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Yevhenii Shcherbina
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## Summary Adds BYOK (Personal API Key) documentation for OpenCode. ## BYOK support | Client | Personal API Key | ChatGPT Subscription | Claude Subscription | |--------------|------------------|----------------------|---------------------| | Codex CLI | ✅ | ✅ | - | | Claude Code | ✅ | - | ✅ | | Mux | ? | ? | ? | | OpenCode | ✅ | ❌ | ❌ | | Factory | ✅ | ❌ | ❌ | | Cline | ✅ Only OpenAI API | ❌ | ❌ | | KiloCode | ❌ (client-side bug) | ❌ | ❌ | | RooCode | ✅ Only OpenAI API | ❌ | ❌ | | VSCode | ❌ | ❌ | ❌ | | JetBrains | ❌ | ❌ | ❌ | | Zed | ❌ | ❌ | ❌ | | Copilot CLI | ? | ? | ? | <details> <summary>Why OpenCode doesn't support subscriptions through AI Bridge</summary> **ChatGPT subscription**: OpenCode's codex plugin [hardcodes the upstream URL](https://github.com/anomalyco/opencode/blob/3a0e00dd7f9192730f6d0eeee37ae0a5fb023927/packages/opencode/src/plugin/codex.ts#L458-L460) to `https://chatgpt.com/backend-api/codex/responses` inside a custom `fetch`, bypassing any configured `baseURL`. **Claude subscription**: Anthropic [no longer supports](https://www.reddit.com/r/ClaudeAI/comments/1r9hqdk/claude_subscriptions_will_no_longer_be_usable_in/) using subscriptions in third-party clients. </details> ## Notes - Anthropic forbids Claude subscription in all 3rd-party clients - OpenCode supports ChatGPT subscription, but there is no way to customize BaseURL - Does it make sense to investigate Mux? - Factory doesn't support ChatGPT subscription - Cline supports ChatGPT subscription, but there is no way to customize BaseURL - KiloCode supports CustomHeaders, but I wasn't able to make it work neither for centralized key nor for BYOK. Seems support for custom providers has bugs. I got different errors for different models, this one is common: `Unsupported parameter: 'max_tokens' is not supported with this model. Use 'max_completion_tokens' instead.` Seems should be fixed on KiloCode side. - RooCode and Cline support only OpenAI. They have special OpenAI-Compatible provider which allows adding custom headers. - VSCode (NativeChat) uses github copilot under the hood. I wasn't able to make it work, neither in VSCode nor in VSCode-Insiders on my MacOS. I used VSCode-Insiders Version: 1.116.0-insider (Universal). I got different errors. When I used Github Copilot Chat (stable release - it ignored my AI Gateway configuration), when I tried to install Github Copilot Chat pre-release it failed with `~/.vscode-insiders/extensions/github.copilot-chat-0.43.2026040705` - JetBrains (embedded AI assistant). OpenAI Compatible provider doesn't support custom headers. Also I got some errors even for centralized key setup. - Zed doesn't support custom headers - Copilot CLI is special, because it's only supported via gateway proxy. But it also means that we don't need support of custom headers, because `X-AI-Gov-Token` is set by proxy itself. So if BYOK is supported in CopilotCLI - it should be supported for CopilotCLI via Bridge and BridgeProxy. ## Questions - Do we want to explicitly state that Claude Max/Pro or ChatGPT Plus/Pro subscriptions aren’t supported by OpenCode via AIBridge? I initially avoided mentioning it since this could change over time, and keeping that information up to date across clients might be difficult.
