# CC Switch v3.16.4

> 🎉 **CC Switch is now in the global top 100 on GitHub by stars!**
> Thank you to every user, contributor, and Star — you brought it here. 🙏

> After v3.16.3 made usage billing accurate, this release shifts the focus to polishing the Codex proxy chain and enriching the usage / pricing tooling — migrating Chinese providers to native Responses, decoupling the upstream-format selector from model mapping, decompressing zstd request / error bodies, and a batch of tool-call and OAuth-through-proxy fixes — while also adding local proxy request overrides, an in-app recovery screen when the database version is too new, native Windows ARM64 builds, and a wave of preset and branding updates (SubRouter, OpenCode Go, the CTok→ETok rename, the Kimi brand refresh, and a prime-partner badge).

**[中文版 →](v3.16.4-zh.md) | [日本語版 →](v3.16.4-ja.md)**

---

## Usage Guides

This release is mostly polish and expansion, with the new capabilities landing mainly in the usage dashboard and the provider form's advanced options. The following docs are worth reading alongside it:

- **[Can't see custom models in the Codex desktop app?](../guides/codex-desktop-custom-model-visibility-en.md)**: many users report that their configured third-party / custom models do not show up in the Codex desktop app's model picker. This is the Codex desktop app's **own upstream gating behavior** (it gates the model picker by official login state), not a CC Switch local-config problem, and **this release (v3.16.4) does not change it**. The doc explains the cause and the available mitigation (keep official login + route takeover).
- **[Usage Statistics](../user-manual/en/4-proxy/4.4-usage.md)**: understand the Usage Dashboard's data sources and how the statistics are counted. This release adds bulk import of model pricing from models.dev, AK/SK usage queries for Volcengine Ark Coding / Agent Plan, and a live end time for custom date ranges.
- **[Settings](../user-manual/en/1-getting-started/1.5-settings.md)**: local proxy request overrides (custom headers / request body), the Codex upstream-format selector, the local routing toggle, and more live in the provider form's advanced options.

---

> [!WARNING]
>
> ## Only Official Channels (Please Read)
>
> CC Switch is a **fully free and open-source** desktop app, and we **do not charge users any fees**. Please only obtain the software through the official channels listed below:
>
> | Channel            | Only Official                                                                  |
> | ------------------ | ------------------------------------------------------------------------------ |
> | Website            | **[ccswitch.io](https://ccswitch.io)**                                         |
> | Source             | **[github.com/farion1231/cc-switch](https://github.com/farion1231/cc-switch)** |
> | Downloads          | **[GitHub Releases](https://github.com/farion1231/cc-switch/releases)**        |
> | Author             | **[@farion1231](https://github.com/farion1231)**                               |
> | Report an Imposter | **[GitHub Issues](https://github.com/farion1231/cc-switch/issues)**            |
>
> **Any "CC Switch" website or client that asks you for payment, top-ups, or login credentials is fake.** If you have been tricked into paying, stop the transaction immediately and file a report through GitHub Issues.

---

## Overview

CC Switch v3.16.4 is a maintenance update following v3.16.3. This release tightens the Codex proxy chain — switching several Chinese providers that have native OpenAI Responses endpoints to the native format (dropping the Responses→Chat route-takeover conversion), promoting "upstream format" out of the "local routing" toggle into its own control, adding decompression for zstd request and error response bodies, and fixing a string of tool-call and "OAuth module bypassing the global proxy" issues.

Alongside that, this release enriches the usage and pricing tooling (import pricing from models.dev, AK/SK usage queries for Volcengine Ark Coding / Agent Plan, a live end time for custom date ranges, GLM-5.2 and Doubao Seed 2.1 pricing), adds a batch of proxy and resilience capabilities (custom header / request-body overrides, an in-app recovery screen when the database version is too new, native Windows ARM64 builds), and brings a wave of preset and branding updates (SubRouter and OpenCode Go subscriptions, the CTok→ETok rename, the Kimi brand refresh and prime-partner badge, and a Kimi K2.7 Code sponsor banner).

**Release date**: 2026-06-27

**Stats**: 53 commits | 126 files changed | +8,149 / -1,016 lines

---

## Highlights

- **Native Responses for Chinese Codex providers**: Qwen / DashScope, Xiaomi MiMo, Volcengine Doubao, Meituan LongCat, and MiniMax (domestic / international) now connect directly to their native Responses endpoints instead of going through the Responses→Chat format-conversion takeover, for a shorter and more stable chain.
- **Local proxy request overrides**: providers can configure custom header and request-body overrides, applied by the local proxy when forwarding, with interception validation that blocks protected security headers.
- **In-app recovery screen for a too-new database**: when the SQLite version is newer than the current app supports, you no longer get stuck in a native dialog where "retry just fails again"; instead you are guided to a recovery screen that can upgrade the app in one click.
- **Richer usage / pricing tooling**: bulk import of model pricing from models.dev, AK/SK usage queries for Volcengine Ark Coding / Agent Plan, a live end time for custom date ranges, and pricing for GLM-5.2 and Doubao Seed 2.1.
- **New presets and branding updates**: added SubRouter and OpenCode Go subscription presets, renamed CTok to ETok, refreshed the Kimi brand mark, and added a prime-partner heart badge to the official Kimi presets.
- **Native Windows ARM64 builds**: release artifacts now include native ARM64 builds, so ARM Windows devices no longer depend on x64 emulation.

---

## Added

### In-App Recovery Screen for a Too-New Database

When the SQLite `user_version` is newer than the current app's supported `SCHEMA_VERSION` (for example after downgrading to an older release, or because a third-party client wrote the file), startup used to die in a native "retry / quit" dialog — where "retry" just fails again. The app now routes to a dedicated recovery screen: when an update is available it offers a one-click "Upgrade App" button (download + install + restart, with a progress bar), and when none is available it explains that even the latest version cannot read this database. The "too new" check runs before any write to the database, so the app never runs DDL against a database it cannot understand; a native close in recovery mode exits cleanly (the tray has not been created yet). ([#4575](https://github.com/farion1231/cc-switch/pull/4575))

### Local Proxy Request Overrides (Custom Headers and Request Body)

Provider configs can now define custom header and request-body overrides that the local proxy applies when forwarding, exposed via new fields in the Claude and Codex provider forms. Input is validated against a protected-header list that blocks overriding security-sensitive headers. ([#4589](https://github.com/farion1231/cc-switch/pull/4589))

### Volcengine Ark Coding / Agent Plan Usage Queries

The usage panel can now query Volcengine Ark's Coding Plan and Agent Plan quotas. Because the Ark control-plane OpenAPI (`open.volcengineapi.com`) requires an account-level AccessKey signature rather than an inference API key, the usage script gains a dedicated AK/SK input area with a clickable link straight to the Volcengine IAM key-management console (`https://console.volcengine.com/iam/keymanage`); the proxy implements Volcengine Signature V4 (an AWS SigV4 variant: a fixed canonical-header order, the `HMAC-SHA256` algorithm, and the `ark` service scope). It first probes `GetAFPUsage` (the Agent Plan's 5-hour / weekly / monthly quotas) to auto-detect the plan and falls back to `GetCodingPlanUsage`, parsing the window label from the `Level` field (with a guard for `ResetTimestamp <= 0`), and adds the `monthly` tier label across the usage footer, the tray menu, and all four locales.

### Import Model Pricing from models.dev

The "Add Pricing" panel gains an "Import from models.dev" button: it fetches `https://models.dev/api.json`, supports full-text search across the entire catalog, and imports the selected entries through the same `update_model_pricing` path as manual entry. Imported model ids are normalized by the backend's `clean_model_id_for_pricing` rules (strip the provider prefix, lowercase, truncate the `:` suffix, map `@` to `-`, drop the `[1m]` marker) so the persisted rows actually match cost-attribution queries. A companion fix changes "backfill zero-cost over a range" to match in Rust by raw model alias (route prefixes, `:free` variants, date suffixes) rather than by exact SQL string match, so newly priced alias rows are priced immediately instead of waiting for the next startup backfill (fixes [#4017](https://github.com/farion1231/cc-switch/issues/4017)). ([#4079](https://github.com/farion1231/cc-switch/pull/4079))

### Native Windows ARM64 Builds

Release artifacts now include native Windows ARM64 builds, so ARM Windows devices can grab the matching native build instead of relying on x64 emulation. The release matrix now also runs each platform independently (fail-fast disabled), so a job that fails for a missing secret (e.g. macOS signing in a fork) no longer cancels its still-running siblings. ([#3950](https://github.com/farion1231/cc-switch/pull/3950))

### Live End Time for Custom Date Ranges

The custom date-range picker gains a "follow the current time as the end time" checkbox; when enabled, the end time becomes read-only and tracks now, so usage data always reflects the live consumption from the chosen start to the present moment. This is especially useful within the Coding Plan's 5-hour quota window. `liveEndTime` is now part of the React Query cache key, so a live range and a fixed range with the same endpoint no longer share the same stale cache entry. ([#4438](https://github.com/farion1231/cc-switch/pull/4438))

### Source File Name in the Session Detail Header

The session detail header now shows the session log's file name next to the project directory (hover for the full path, click to copy), so you can locate and open the underlying JSONL file directly from the UI. For long file names without spaces, such as the ~70-character Codex rollout names, it truncates at `max-w-[200px]` to avoid overflowing into the action buttons in a narrow window. ([#4113](https://github.com/farion1231/cc-switch/pull/4113))

### Unmanaged-Skill Hint on the Import Button

The Skills import button in the top bar now shows a green dot and a tooltip when there are unmanaged Skills on disk available to import, so you can tell at a glance that a Skill on disk hasn't been brought under management yet. The scan runs once on mount and is shared across navigations (30s `staleTime` + `keepPreviousData`) to avoid redundant disk IO.

### OpenCode Go Subscription Presets

Added the OpenCode Go (`opencode.ai/zen/go`) preset, covering Claude, Codex, and OpenCode, using a paste-ready bare API key (no OAuth). The Codex preset uses `openai_chat` conversion with a GLM / Kimi / DeepSeek / MiMo model catalog (and without a static `codexChatReasoning`, inferring each model's capabilities), while OpenCode points at `/zen/go/v1` via `@ai-sdk/openai-compatible`. All four OpenCode Go presets — Claude, Claude Desktop, Codex, and OpenCode — carry the referral link and in-app promotion copy; the promotion banner now shows on `partnerPromotionKey` alone (no longer bound to `isPartner`), so a preset can surface a referral promotion without earning the gold paid-partner star (which incidentally brings the existing MiniMax promotion back into view).

### Prime-Partner Preset Badge and Sorting

The first-party Moonshot Kimi presets (Kimi / Kimi For Coding / Kimi K2.7 Code) are now marked as prime partners: instead of the gold star they render a solid gold heart (no badge border) and, in the default (Original) sort, float to just after the official-category presets and before the rest. The grouping is done with a three-way partition that keeps each group's internal order, and an official preset that is also marked prime-partner stays only in the official group.

### GLM-5.2 and Doubao Seed 2.1 Pricing

The seed model pricing now includes GLM-5.2 ([#4385](https://github.com/farion1231/cc-switch/pull/4385)) and Doubao Seed 2.1 Pro / Turbo, so these models' usage is priced correctly instead of being recorded at zero cost. Doubao prices use Volcengine's official list pricing (converted at roughly 7.14); `cache_creation` stays at 0 because Doubao bills cache storage by time rather than by token writes, and the existing 2.0 rows are retained for historical accounting.

### Kimi For Coding Auto-Compact Window

The Kimi For Coding preset now defaults `CLAUDE_CODE_AUTO_COMPACT_WINDOW` to 262144, matching Kimi's official documentation, and exposes it via `templateValues` so users can customize the value for future models or performance tuning. ([#4401](https://github.com/farion1231/cc-switch/pull/4401))

### SubRouter Partner Provider

Added SubRouter (`subrouter.ai`, an AI relay aggregator that lets one key reach many models across many providers) as a preset covering all seven managed apps — an Anthropic-format endpoint for Claude Code / Claude Desktop / OpenClaw / Hermes, an OpenAI-compatible `/v1` endpoint (`gpt-5.5`) for Codex and OpenCode, and a Gemini-compatible `/v1beta` endpoint (`gemini-3.5-flash`) for Gemini CLI — with its own brand icon, a gold partner star, four-language promotion copy, and a referral signup link prefilled to the API-key registration page (`?aff=l3ri`). ([#4522](https://github.com/farion1231/cc-switch/pull/4522))

---

## Changed

### Chinese Codex Providers Use the Native Responses API

Several Chinese providers (Qwen / DashScope, Xiaomi MiMo, Volcengine Doubao, Meituan LongCat, MiniMax domestic / international) now expose native OpenAI Responses endpoints, so their Codex presets switch to `apiFormat: "openai_responses"`, connecting directly to the upstream instead of going through the Responses→Chat route-takeover conversion. Dropping the no-longer-needed `codexChatReasoning` and `modelCatalog` also keeps the "local routing mapping" toggle unchecked by default. SiliconFlow-hosted MiniMax stays on `openai_chat` because that is a third-party endpoint, not MiniMax's own base_url. The remaining chat-based providers also refreshed stale model ids (GLM 5.1→5.2, StepFun 3.5-flash-2603→3.7-flash, Ling 2.5-1T→2.6-1T).

### Upstream-Format Selector Decoupled from the Model-Mapping Toggle

The Codex provider form previously bound Chat format conversion and route takeover (model mapping) to the same toggle, which meant a provider offering a native Responses API couldn't use model mapping without forcing Chat Completions conversion. "Upstream format" (Chat Completions / Responses) is now a separate, always-visible selector, while the local routing toggle only controls the advanced subsection (the model-mapping catalog, plus reasoning capabilities when the format is Chat). Its initial state is derived from whether a saved catalog exists, adding no new persisted field; the four-language (zh / en / ja / zh-TW) `codexConfig` copy was rewritten to match.

### Doubao Seed 2.1 Pro Preset

The DouBaoSeed preset now points to `doubao-seed-2-1-pro` (replacing `doubao-seed-2-0-code-preview-latest`) across all six clients (claude, claude-desktop, codex, opencode, openclaw, hermes), updates the display name to "Doubao Seed 2.1 Pro", and corrects the OpenClaw cost fields from 0.002 / 0.006 to 0.84 / 4.2 USD per million tokens to match the new model.

### CTok Renamed to ETok

Following the vendor's domain, endpoint, and trademark rename, all user-facing branding migrates from CTok to ETok (`ctok.ai`→`etok.ai`, `api.ctok.ai`→`api.etok.ai`, plus the internal id, display name, icon, and README partner banner), across every client preset. The Codex history-migration whitelist still keeps `ctok` as a legacy id alongside the new `etok`, so existing users' local session history stays correctly bucketed after the rename.

### Kimi Preset Naming Unified

The Kimi presets that OpenCode and OpenClaw previously labeled "Kimi K2.7 Code" are renamed to "Kimi" to match the other apps (OpenCode's provider display name is renamed too); the model label still keeps "Kimi K2.7 Code" because it describes the actual model.

### JSON Editor Dark Mode

The CodeMirror `JsonEditor` in the usage-script dialog, the provider form, and the universal provider form now follows the app theme via `useDarkMode()`, switching to the `oneDark` editor theme instead of staying light while the rest of the app is already dark. ([#4556](https://github.com/farion1231/cc-switch/pull/4556))

### More Compact "Add Provider" Header and Footer Hint

The "Add Provider" dialog tightens the vertical spacing from the title to the tabs and from the tabs to the cards from 24px to 12px, and adds an always-visible fixed footer hint guiding users to fill in the fields below after choosing a preset. `FullScreenPanel` gains an optional `contentClassName` prop so the padding override applies only to this panel without affecting other panels that share it.

### Theme-Adaptive Kimi Mark

The inline Kimi placeholder mark is replaced with the vendor's refreshed mark. The K glyph uses `currentColor` so it follows the theme text color (dark in light mode, white in dark mode), while the brand accent color is fixed to the new `#1783FF`, with the metadata fallback color aligned accordingly.

### Removed the Fable 5 Verified Banner

The Settings About page no longer shows the Fable 5 Verified commemorative banner that 3.16.3 added beside the app name to mark a special build; the banner image and its marker are removed, and the About panel returns to the standard version-badge layout.

---

## Fixed

### Copilot / Codex OAuth Requests Now Honor the Global Proxy

`CopilotAuthManager` and `CodexOAuthManager` hardcoded `Client::new()` at construction, so their auth flows (token exchange, fetching the `/models` list, determining model vendor, device-code and OAuth refresh requests) ignored the configured global proxy and connected directly to the target services. On Copilot, a direct connection made `/models` return 0 Claude models, breaking live model resolution, and the upstream rejected requests with `400 model_not_supported`. Both managers now pull from the shared client on each request (`crate::proxy::http_client::get()`), honoring the global proxy URL and supporting runtime hot reload. Fixes [#2016](https://github.com/farion1231/cc-switch/issues/2016) and [#2931](https://github.com/farion1231/cc-switch/issues/2931). ([#4583](https://github.com/farion1231/cc-switch/pull/4583))

### Decompressing Compressed Request and Error Bodies

Codex Desktop sends zstd-compressed request bodies when authenticating to the Codex backend, which broke local proxy routing because the handlers parsed the raw compressed bytes directly with `serde_json`. The proxy now decompresses the request body before JSON parsing (gzip / br / deflate, plus the newly added zstd support, including stacked encodings like `gzip, zstd`), across three Codex handlers, and strips the stale `content-encoding` / `content-length` / `transfer-encoding` request headers so the forwarder regenerates them. Upstream non-2xx error bodies are decompressed the same way, so compressed rate-limit and auth details are no longer dropped and hidden from the client. Fixes [#3764](https://github.com/farion1231/cc-switch/issues/3764) and [#3696](https://github.com/farion1231/cc-switch/issues/3696). ([#3817](https://github.com/farion1231/cc-switch/pull/3817))

### DeepSeek Endpoint 400 with `thinking: disabled`

DeepSeek's Anthropic-compatible endpoint rejects requests where `thinking.type=disabled` coexists with an effort parameter, returning HTTP 400, which broke Claude Code 2.1.166+ sub-agents (Workflow / Dynamic Workflow) that hardcode `thinking: disabled`. Rather than overriding the client's intent, the proxy now strips the conflicting `output_config.effort` / `reasoning_effort` parameters for the official DeepSeek endpoint, since sub-agents don't need to surface reasoning anyway. ([#4239](https://github.com/farion1231/cc-switch/pull/4239))

### Reverted Hoisting Anthropic system Messages

Reverted the [#3775](https://github.com/farion1231/cc-switch/pull/3775) change that hoisted `role=system` messages on Anthropic-compatible providers from `messages[]` up to the top-level `system` field. The DeepSeek endpoint natively accepts inline system messages, and the rewrite changed the request prefix; keeping messages in place preserves the prompt prefix and avoids a suspected cache-hit-rate regression (see [#4297](https://github.com/farion1231/cc-switch/issues/4297)). The unrelated Windows test fix and the tool-thinking-history normalization from #3775 are retained.

### Chat Tool Calls Missing Function Names

Some upstreams send empty or missing function names in streaming tool-call deltas, which used to produce invalid Codex Chat output items (or an `unknown_tool` fallback). Accumulated tool-call state is no longer overwritten by an empty delta, and tool calls that never receive a `call_id` and a valid name are skipped at finalization, across the streaming, non-streaming, and legacy `function_call` paths. ([#4159](https://github.com/farion1231/cc-switch/pull/4159))

### Restore Cached Codex Tool-Call Fields

When Codex makes a follow-up Chat request that references a `previous_response_id`, its `function_call` items may carry only the `call_id`. History enhancement previously backfilled only `reasoning` / `reasoning_content`, leaving the function's `name`, `arguments`, `status`, and other fields empty; it now restores all cached tool-call fields from history so the call can be correctly reconstructed for the Chat upstream. ([#4160](https://github.com/farion1231/cc-switch/pull/4160))

### Duplicate Codex base_url Entries in config.toml

Writing Codex's `base_url` into `config.toml` previously replaced or removed only one matching assignment per section, so a section that already contained multiple `base_url` lines kept the extras and accumulated duplicates. `setCodexBaseUrl` now collapses all matches in the target section or at the top level (replacing the first, removing the rest), and the TOML `base_url` regex now handles escaped quotes. ([#4316](https://github.com/farion1231/cc-switch/pull/4316))

### History Migration Probes the CODEX_SQLITE_HOME State DB

Codex session-history migration previously scanned only `~/.codex/state_5.sqlite` and the `sqlite_home` location in `config.toml`, so when Codex's SQLite state was relocated via the `CODEX_SQLITE_HOME` environment variable, the state DB was never scanned and its threads stayed in the old provider bucket. The `codex_state_db_paths` helper shared by both the third-party and unified-session migrations now falls back to `CODEX_SQLITE_HOME` (the `sqlite_home` in `config` still takes precedence).

### Provider Terminal Honors the User Shell

Launching a provider terminal on macOS / Linux previously hardcoded `bash`, so zsh / fish users' rc files weren't loaded. The launcher now detects the user's default shell from `$SHELL` (falling back to `/bin/zsh` on macOS, `/bin/bash` on Linux) and execs into it with the clean-start flag, while the launch script itself now uses POSIX `sh` for portability (e.g. fish, and NixOS where `/bin/sh` may not exist). ([#4140](https://github.com/farion1231/cc-switch/pull/4140), fixes [#1546](https://github.com/farion1231/cc-switch/issues/1546))

### Claude MCP Paths Honor the Custom Config Directory

When a custom Claude config directory is configured, MCP server reads and writes now resolve to the MCP file under that directory instead of the default location, isolating MCP state per profile. The old "copy on access" migration of the legacy file was removed in favor of resolving the override path directly. ([#3431](https://github.com/farion1231/cc-switch/pull/3431))

### Preset Results Clickable After Search

After searching in the "Add Provider" preset selector, results briefly couldn't be clicked or selected. The `requestAnimationFrame` `select()` that fought the input and swallowed the first character (e.g. "gateway" → "ateway") was removed, input auto-focus on the open-and-click path was restored, and pressing Ctrl/Cmd+F while the search box is already open now refocuses it. The provider list's typing guard was also narrowed to the Ctrl/Cmd+F branch so Escape can still close the search panel. ([#4315](https://github.com/farion1231/cc-switch/pull/4315))

### Skills Browsing and Provider Card Display Fixes

Fixed several display and interaction issues: repository management actions stay available while browsing skills.sh, and refresh stays available when a repository returns empty results; overly long provider names and website URLs on provider cards now truncate instead of overflowing; the OMO model-variant dropdown truncates the selected label with a full-text tooltip; and Select menu items show a checkmark on the currently selected item. ([#4323](https://github.com/farion1231/cc-switch/pull/4323))

### Reset Scroll When Switching Settings Tabs

Switching tabs in the Settings dialog used to keep the previous tab's scroll position, sometimes landing halfway down the new tab; the scroll container now resets to the top whenever the active tab changes. ([#4165](https://github.com/farion1231/cc-switch/pull/4165))

---

## Documentation

### Kimi Pinned Sponsor Banner

The pinned sponsor banner at the top of all four README languages (en / zh / ja / de) is now Kimi K2.7 Code, replacing the previous MiniMax M2.7 banner. The copy reflects the K2.7 Code release (a coding-oriented agentic model with thinking-token usage down roughly 30% from K2.6), the banner is now served from in-repo assets (`assets/partners/banners/kimi-banner-en.png` / `kimi-banner-zh.png`) instead of the Moonshot CDN, and it carries a clickable call to action pointing at the `aff=cc-switch` Moonshot console.

### Codex Unified Session History Guide

Added a three-language (zh / en / ja) guide explaining what the unified Codex session history toggle's enable-time migration (when enabled) and ledger-based restore (when disabled) actually do, why session data is never truly deleted (only re-tagged + auto-backed-up), and how to verify whether files really are on disk or were just filed into another provider's drawer. It includes a symptom table for the common "my sessions are gone" misunderstanding and disk-verification commands for macOS / Linux / Windows, and is linked as the first item in the v3.16.3 release notes' "Usage Guides".

### Simplified Homebrew Install Instructions

The install guide no longer asks users to run `brew tap farion1231/ccswitch` before `brew install --cask cc-switch`; this deprecated tap step is removed from the en / ja / zh user manuals, and the cask now installs directly. ([#4319](https://github.com/farion1231/cc-switch/pull/4319))

### Star-History Global Ranking Badge

Added a star-history global ranking badge next to the existing Trendshift badge across all four README languages, with light / dark theme variants.

### Volcengine Ark Coding Plan Activity Link

The "developers in mainland China click here" link in the ByteDance / Volcengine Ark sponsor entry now points to Volcengine's `ai618` activity page, replacing the previous `codingplan` referral URL, across all four README languages.

### CCSub Sponsor Banner Vector Asset

Replaced the low-resolution `ccsub.jpg` sponsor logo with the vector `ccsub.svg`, letterboxed from 2046x648 to 2046x850 (roughly 2.406:1) so it matches the other sponsor-table banners and renders at the same 62px height. All four README languages point to the new asset.

---

## Upgrade Notes

### Chinese Codex Providers' Native Responses Migration

This release switches the Codex presets of several Chinese providers with native Responses endpoints (Qwen / DashScope, Xiaomi MiMo, Volcengine Doubao, Meituan LongCat, MiniMax domestic / international) to `openai_responses` and removes their `modelCatalog`. Existing providers already configured from these presets are unaffected and keep their configuration as-is; if you want to switch to native Responses (dropping the format-conversion takeover), re-pick the preset once and save. SiliconFlow-hosted MiniMax stays on `openai_chat` and is not part of this migration.

### Recovery from a Too-New Database

If you opened the database with a higher version of CC Switch and then switched back to an older version, the older version will enter the new "database version too new" recovery screen on startup and guide you to upgrade to a version that can read the database. This is expected behavior — upgrading to the latest version restores normal operation.

---

## Risk Notice

This release continues the risk notices from previous versions for reverse-proxy-style features.

**Codex OAuth reverse proxy**: using a ChatGPT subscription's Codex OAuth through a reverse proxy may violate OpenAI's terms of service. See the [v3.13.0 release notes](v3.13.0-en.md#️-risk-notice) for details.

**Codex third-party provider Chat routing**: when CC Switch local proxy converts and forwards Codex requests to third-party providers, each provider may have different requirements for billing, compliance, and data retention. Read the target provider's terms before use.

**Claude Desktop third-party provider proxy switching**: when CC Switch's built-in proxy gateway forwards Claude Desktop requests to third-party providers, you must also follow the target provider's billing, compliance, and data-retention terms.

By enabling these features, users accept the related risks. CC Switch is not responsible for account restrictions, warnings, or service suspensions caused by using these features.

---

## Thanks

Thanks to the following contributors for the features and fixes in v3.16.4:

- [#3817](https://github.com/farion1231/cc-switch/pull/3817): decompress the request body before forwarding and add zstd support, thanks @chenx-dust.
- [#4583](https://github.com/farion1231/cc-switch/pull/4583): fix the Copilot / Codex OAuth modules bypassing the global proxy and causing Claude model 400s, thanks @zymouse.
- [#4589](https://github.com/farion1231/cc-switch/pull/4589): add local proxy request overrides (custom headers and request body), thanks @mfzzf.
- [#4575](https://github.com/farion1231/cc-switch/pull/4575): add an in-app recovery screen for a too-new database version, thanks @SaladDay.
- [#4556](https://github.com/farion1231/cc-switch/pull/4556): wire dark mode into the JsonEditor in several places, thanks @TanKimzeg.
- [#4438](https://github.com/farion1231/cc-switch/pull/4438): add a live end time for custom date ranges, thanks @arichyx.
- [#3950](https://github.com/farion1231/cc-switch/pull/3950): add Windows ARM64 release support, thanks @MOON-DREAM-STARS.
- [#4401](https://github.com/farion1231/cc-switch/pull/4401): add CLAUDE_CODE_AUTO_COMPACT_WINDOW to the Kimi For Coding preset, thanks @cyijun.
- [#4323](https://github.com/farion1231/cc-switch/pull/4323): fix the Skills management and model-config interaction display, thanks @thisTom.
- [#3431](https://github.com/farion1231/cc-switch/pull/3431): align Claude MCP paths to the custom config directory, thanks @makoMakoGo.
- [#4159](https://github.com/farion1231/cc-switch/pull/4159): skip Chat tool calls missing function names, thanks @hueifeng.
- [#4385](https://github.com/farion1231/cc-switch/pull/4385): add glm-5.2 pricing, thanks @arichyx.
- [#4079](https://github.com/farion1231/cc-switch/pull/4079): support importing model pricing from models.dev, thanks @kingcanfish.
- [#4315](https://github.com/farion1231/cc-switch/pull/4315): fix preset results not being clickable / selectable after search, thanks @RuixeWolf.
- [#4316](https://github.com/farion1231/cc-switch/pull/4316): prevent duplicate Codex base_url entries, thanks @jeffwcx.
- [#4140](https://github.com/farion1231/cc-switch/pull/4140): make the provider terminal honor the user shell, thanks @zkforge.
- [#4113](https://github.com/farion1231/cc-switch/pull/4113): show the source file name in the session detail header, thanks @xu-song.
- [#4160](https://github.com/farion1231/cc-switch/pull/4160): restore cached Codex tool-call fields, thanks @chen-985211.
- [#4239](https://github.com/farion1231/cc-switch/pull/4239): strip the effort parameter when thinking:disabled on DeepSeek endpoints, thanks @maskshell.
- [#4165](https://github.com/farion1231/cc-switch/pull/4165): reset scroll when switching settings tabs, thanks @Muleizhang.
- [#4319](https://github.com/farion1231/cc-switch/pull/4319): remove the deprecated Homebrew tap step, thanks @tianpeng-dev.
- [#4522](https://github.com/farion1231/cc-switch/pull/4522): add the SubRouter provider preset, thanks @abingyyds.

Thanks also to everyone who reported Codex proxy chain, usage billing, local proxy robustness, and platform compatibility issues after the v3.16.3 release. Many of these patches came directly from real-world reproduction clues.

---

## Download & Install

Visit [Releases](https://github.com/farion1231/cc-switch/releases/latest) and download the build for your system.

### System Requirements

| System  | Minimum Version          | Architecture                        |
| ------- | ------------------------ | ----------------------------------- |
| Windows | Windows 10 and later     | x64 / ARM64                         |
| macOS   | macOS 12 (Monterey)+     | Intel (x64) / Apple Silicon (arm64) |
| Linux   | See table below          | x64 / ARM64                         |

### Windows

| File                                     | Description                                      |
| ---------------------------------------- | ------------------------------------------------ |
| `CC-Switch-v3.16.4-Windows.msi`          | **Recommended** - MSI installer with auto-update |
| `CC-Switch-v3.16.4-Windows-Portable.zip` | Portable build, unzip and run                    |

Windows ARM64 devices should pick the artifact whose file name carries the `arm64` tag.

### macOS

| File                             | Description                                           |
| -------------------------------- | ----------------------------------------------------- |
| `CC-Switch-v3.16.4-macOS.dmg`    | **Recommended** - DMG installer, drag to Applications |
| `CC-Switch-v3.16.4-macOS.zip`    | Unzip and drag to Applications, Universal Binary      |
| `CC-Switch-v3.16.4-macOS.tar.gz` | For Homebrew install and auto-update                  |

Homebrew install:

```bash
brew install --cask cc-switch
```

Upgrade:

```bash
brew upgrade --cask cc-switch
```

### Linux

Linux assets are available for both **x86_64** and **ARM64** (`aarch64`). Choose the file whose architecture tag matches your machine's `uname -m` output:

- `CC-Switch-v3.16.4-Linux-x86_64.AppImage` / `.deb` / `.rpm`
- `CC-Switch-v3.16.4-Linux-arm64.AppImage` / `.deb` / `.rpm`

| Distribution                            | Recommended Format | Install Command                                                        |
| --------------------------------------- | ------------------ | --------------------------------------------------------------------- |
| Ubuntu / Debian / Linux Mint / Pop!\_OS | `.deb`             | `sudo dpkg -i CC-Switch-*.deb` or `sudo apt install ./CC-Switch-*.deb` |
| Fedora / RHEL / CentOS / Rocky Linux    | `.rpm`             | `sudo rpm -i CC-Switch-*.rpm` or `sudo dnf install ./CC-Switch-*.rpm`  |
| openSUSE                                | `.rpm`             | `sudo zypper install ./CC-Switch-*.rpm`                                |
| Arch Linux / Manjaro                    | `.AppImage`        | Make executable and run directly, or use AUR                          |
| Other distributions / unsure            | `.AppImage`        | `chmod +x CC-Switch-*.AppImage && ./CC-Switch-*.AppImage`             |
