小米模型Mimo使用CC Switch接入的问题

[jiang3408]

Question

opencode使用过程中，在使用CC Switch切换成小米的Mimo模型之后，在思考过程中出现报错Bad Request: {"error":{"code":"400","message":"Param Incorrect","param":"The reasoning_content in the thinking mode must be passed back to the API.","type":""}}。

[github-actions]

This issue might be a duplicate of existing issues. Please check:

• DeepSeek thinking mode: reasoning_content not passed back for tool call turns, causing 400 errors #24722: DeepSeek thinking mode: reasoning_content not passed back for tool call turns, causing 400 errors (same root cause — reasoning_content must be passed back to the API in thinking mode)
• thinking is enabled but reasoning_content is missing in assistant tool call message at index ... #25758: thinking is enabled but reasoning_content is missing in assistant tool call message (same error symptom)
• Cerebras zai-glm-4.7 fails on follow-up turn with reasoning_content #26762: Cerebras zai-glm-4.7 fails on follow-up turn with reasoning_content (same error with a different model via CC Switch/custom provider)

The error message "The reasoning_content in the thinking mode must be passed back to the API" is the same underlying issue affecting multiple models/providers. Please check if your issue is already tracked in one of the above.

[Gove2004]

API Error: 400 Param Incorrect

https://blog.csdn.net/qq_36710118/article/details/161172981

[dwi-wijonarko]

is there any progress on this issue?

[Gove2004]

同样的400错误, 但是没有进展

[sgwpss]

找到根因和解法了（已实测）。

根因：OpenCode 是否把上一轮 assistant 的 reasoning_content 回传到后续请求，由该 model 的 interleaved capability 决定（见 packages/opencode/src/provider/transform.ts ~308 行：model.capabilities.interleaved 为带 field 的对象时才回传）。models.dev 内置的 MiMo/DeepSeek 定义本来就带 interleaved（如 providers/xiaomi/models/mimo-v2.5-pro.toml 有 [interleaved] field = "reasoning_content"）。但用自定义 provider（CC Switch、或手写 opencode.json）时，model 定义不继承 models.dev 的 capability，interleaved 丢失 → 不回传 reasoning_content → 多轮工具调用第二轮触发此 400。

解法：在自定义 provider 的每个 model 上手动补：

"reasoning": true,
"interleaved": { "field": "reasoning_content" }

实测（opencode 1.15.12 + mimo-v2.5-pro 直连）：补上后多轮 + 工具调用全程不再报此 400，reasoning 在多轮间正常保留。

同样适用于 #26762（GLM 经自定义 provider）等“自定义 provider + DeepSeek 思考协议族模型”场景，同根 #24722 / #25758。

EN TL;DR: This 400 (reasoning_content must be passed back) is gated on the model's interleaved capability, which triggers OpenCode's reasoning_content round-trip. Built-in models.dev defs (MiMo/DeepSeek) have it, but custom providers don't inherit it. Fix: add "reasoning": true and "interleaved": {"field": "reasoning_content"} to each model in your custom provider config. Verified on opencode 1.15.12 + mimo-v2.5-pro.