After upgrading from 1.19 to 2.0, attempting to switch Mimo reasoning replies "does not support any variants" #58897

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1. opencode-agent commented on Oct 25, 2026

   

   opencode-agentBot

   on Oct 25, 2026 – with OpenCode Agent

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   Thanks for the report! I think this is a duplicate of #51541.

   In OpenCode 2.x, MiMo models come from the provider catalog with only an on/off thinking toggle (no effort levels), and they use the generic OpenAI-compatible provider package. OpenCode doesn't currently build any variants for a toggle on that package, so /variant reports that the model doesn't support any. #51541 describes exactly this, using the Xiaomi token-plan MiMo v2.6 models as its example.

   Possible duplicates and related issues, ordered by likelihood:

   • reasoning_options=[toggle] yields zero variants for @ai-sdk/openai-compatible providers (485 models, e.g. all Xiaomi MiMo) #51541: toggle-only reasoning models on @ai-sdk/openai-compatible (including all Xiaomi MiMo token-plan models) get zero variants. Same problem.
   • MiniMax M3.1 Flash Preview offers no thinking depth variants despite a catalog-declared effort ladder #54801: a MiniMax model gets no thinking variants even though the catalog lists effort levels. Similar symptom, different cause.
   • Free Zen models with reasoning=true show zero thinking variants (reasoning_options=[] blocks fallback) #49013: free Zen reasoning models show zero thinking variants. Similar symptom.
   • reasoningToggle() returns {} for @ai-sdk/openai-compatible despite models.dev declaring a toggle (GLM 4.7, GLM 5-turbo) #42793 (closed): the same toggle-on-openai-compatible gap, reported for GLM models.
   • go: /v1/chat/completions returns 400 for reasoning_effort=max|minimal on mimo-v2.6-flash (low/medium/high succeed) #50818: OpenCode Go rejects some reasoning_effort values for mimo-v2.6-flash.

   The bot will close this issue as a duplicate in 1 day unless you reply explaining how your problem is different. You can follow #51541 for updates.
2. opencode-agent

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   on Oct 25, 2026
3. DXXS commented on Oct 25, 2026

   

   DXXS

   on Oct 25, 2026

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   It's currently not allowing one to 'toggle' the reasoning on or off either; their own web page indicates they support a number of values "... When set to none, reasoning is disabled; all other valid values map to enabled reasoning. The value minimal is mapped to low. Values xhigh, max and ultra are mapped to high". That other bug was opened a month ago.

   Why don't you just revert the code to 1.19?
4. opencode-agent

   closed this as duplicateon Oct 26, 2026
5. opencode-agent commented on Oct 26, 2026

   

   opencode-agentBot

   on Oct 26, 2026 – with OpenCode Agent

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   Closing this as a duplicate of #51541, since we haven't heard back. That issue tracks the same problem: Xiaomi MiMo token-plan models (including MiMo-V2.6) only have an on/off thinking toggle on the OpenAI-compatible provider package, OpenCode builds no reasoning variants for that, and so /variant says the model doesn't support any. Please follow #51541 for updates. If your problem turns out to be different, reply here and we can reopen.
6. DXXS commented on Oct 26, 2026

   

   DXXS

   on Oct 26, 2026

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   What do you mean by "haven't heard back"? i responded, and instead of explaining why you can't either simply map to the values that they support, or revert the code to known working good state within a month, you want me to duplicate my efforts in a bug report whose 'toggle' premise isn't entirely supported by the provided mimo documentation?