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Fix reasoning not working for MiniMax Coding Plan #4062

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Merged
chrarnoldus merged 1 commit into from
Jun 17, 2026
+15 −2
Merged

Fix reasoning not working for MiniMax Coding Plan #4062

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11 changes: 11 additions & 0 deletions apps/web/src/lib/ai-gateway/providers/apply-provider-specific-logic.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -32,6 +32,7 @@ import {
addCacheBreakpoints,
enableReasoningSummaries,
fixResponsesRequest,
isReasoningExplicitlyEnabled,
scrubOpenCodeSpecificProperties,
} from '@/lib/ai-gateway/providers/openrouter/request-helpers';
import { isQwenExplicitCacheModel, isQwenModel } from '@/lib/ai-gateway/providers/qwen';
Expand Down Expand Up @@ -180,6 +181,16 @@ export function applyProviderSpecificLogic(
addCacheBreakpoints(requestToMutate);
}

if (
isMinimaxModel(requestedModel) &&
!isReasoningExplicitlyEnabled(requestToMutate) &&
requestToMutate.kind === 'messages'
) {
// MiniMax defaults to thinking, but the Anthropic provider does not include thinking:disabled in the request, creating a mismatch.
// https://github.com/vercel/ai/blob/4a441d8fb584b231f771348de3e7f383ab7aa95b/packages/anthropic/src/anthropic-language-model.ts#L421-L453
requestToMutate.body.thinking = { type: 'disabled' };
}

provider.transformRequest({
provider,
model: requestedModel,
Expand Down
6 changes: 4 additions & 2 deletions apps/web/src/lib/ai-gateway/providers/model-settings.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -143,8 +143,10 @@ export function getAiSdkProvider(
if (isOpenCodeGoAnthropicMessagesModel(model)) {
return 'anthropic';
}
if (isClaudeModel(model)) {
// on Vercel AI Gateway, this is necessary to support document attachments
if (
isClaudeModel(model) || // on Vercel AI Gateway, this is necessary to support document attachments
isMinimaxModel(model) // on Vercel AI Gateway, this is necessary for reasoning to show
) {
return 'anthropic';
}
if (isOpenAiModel(model) || isGrokModel(model)) {
Expand Down