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feat(opencode): enable 1M context + adaptive thinking for Opus 4.6 (#150) #152

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Merged
randomm merged 1 commit into from
Feb 6, 2026
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feat(opencode): enable 1M context + adaptive thinking for Opus 4.6 (#150) #152

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2 changes: 1 addition & 1 deletion packages/opencode/src/provider/provider.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -73,7 +73,7 @@ export namespace Provider {
options: {
headers: {
"anthropic-beta":
"claude-code-20250219,interleaved-thinking-2025-05-14,fine-grained-tool-streaming-2025-05-14",
"claude-code-20250219,interleaved-thinking-2025-05-14,fine-grained-tool-streaming-2025-05-14,adaptive-thinking-2026-01-28,context-1m-2025-08-07",
},
},
}
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28 changes: 27 additions & 1 deletion packages/opencode/src/provider/transform.ts
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Expand Up @@ -447,8 +447,33 @@ export namespace ProviderTransform {

case "@ai-sdk/anthropic":
// https://v5.ai-sdk.dev/providers/ai-sdk-providers/anthropic
case "@ai-sdk/google-vertex/anthropic":
case "@ai-sdk/google-vertex/anthropic": {
// https://v5.ai-sdk.dev/providers/ai-sdk-providers/google-vertex#anthropic-provider
const modelId = model.id || ""
const isOpus46 =
modelId.includes("claude-opus-4.6") ||
modelId.includes("claude-opus-4-6") ||
modelId.includes("claude-opus-4.6")

if (isOpus46) {
// Opus 4.6 uses adaptive thinking with effort levels
return {
high: {
thinking: {
type: "enabled",
effort: "high",
},
},
max: {
thinking: {
type: "enabled",
effort: "max",
},
},
}
}

// Older models use manual thinking with budgetTokens
return {
high: {
thinking: {
Expand All @@ -463,6 +488,7 @@ export namespace ProviderTransform {
},
},
}
}

case "@ai-sdk/amazon-bedrock":
// https://v5.ai-sdk.dev/providers/ai-sdk-providers/amazon-bedrock
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