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Support OpenAI-compatible providers (Kimi, DeepSeek) with chat-completions API #18050
Closed as not planned
Description
Problem
OpenCode uses /v1/responses endpoint by default, but many popular providers (Kimi, DeepSeek, Gemini via OpenAI-compatible mode) only support /v1/chat/completions, resulting in 404 errors.
Affected Providers
- Kimi (Moonshot): Returns 404 for
/v1/responses- the endpoint does not exist - DeepSeek: Authentication fails due to endpoint mismatch
- Gemini (OpenAI-compatible): Similar issues with endpoint compatibility
Error Examples
Kimi
POST https://api.moonshot.cn/v1/responses → 404 Not Found
DeepSeek
Unauthorized: Authentication Fails (governor)
Proposed Solution
Add apiType configuration option to allow providers to specify which API endpoint to use.
Example Configuration
{
"provider": {
"kimi": {
"npm": "@ai-sdk/openai-compatible",
"apiType": "chat-completions",
"options": {
"baseURL": "https://api.moonshot.cn/v1"
}
}
}
}Backward Compatibility
Default to apiType: "responses" to maintain existing behavior for OpenAI and other providers.
Workaround
Currently users have to use OpenAI-compatible SDK with custom configuration, but the model selection and provider detection don't work properly.
Related
This affects the growing ecosystem of OpenAI-compatible APIs in China and other regions where providers have not yet migrated to the responses API.
Environment
- OpenCode version: 1.2.27
- OS: Linux
- Providers tested: Kimi (Moonshot), DeepSeek, Gemini
Activity
github-actions commentedon Mar 18, 2026
This issue doesn't fully meet our contributing guidelines.
What needs to be fixed:
[FEATURE]:, and the template's verification checkbox and description fields must be filled in).Please edit this issue to address the above within 2 hours, or it will be automatically closed.
This issue might be a duplicate of existing issues. Please check:
/v1/chat/completions, not/v1/responses)If you believe this was flagged incorrectly, please let a maintainer know.
feat: support OpenAI-compatible providers with chat-completions API
github-actions commentedon Mar 18, 2026
This issue has been automatically closed because it was not updated to meet our contributing guidelines within the 2-hour window.
Feel free to open a new issue that follows our issue templates.
rekram1-node commentedon Mar 18, 2026
ai-sdk/openai-compatible doesn't support responses api, so that shouldn't happen unless u are using ai-sdk/openai