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fix(core): keep thinking on for Claude Opus 5.5 variants (#51338)

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This commit is contained in:
Shoubhit Dash
2026-09-25 18:32:41 +05:30
committed by GitHub
parent c34ffa117e
commit 14fc63ba9e
2 changed files with 35 additions and 2 deletions
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packages/core/src/variant.ts
+11 -2
View File
@@ -54,7 +54,8 @@ const modelID = (model: Model.Info) => model.modelID ?? model.id
function claudeInfo(model: Model.Info) {
const id = modelID(model)
const familyFirst = /(?:claude-)?(opus|sonnet|haiku|fable|mythos)-(\d+)(?:[.-](\d+))?/i.exec(id)
// Versions are at most two digits so snapshot dates such as `-20260901` are not read as versions.
const familyFirst = /(?:claude-)?(opus|sonnet|haiku|fable|mythos)-(\d{1,2})(?:[.-](\d{1,2}))?(?!\d)/i.exec(id)
const versionFirst = /claude-(\d+)(?:[.-](\d+))?-(opus|sonnet|haiku|fable|mythos)/i.exec(id)
const family = (familyFirst?.[1] ?? versionFirst?.[3])?.toLowerCase()
const major = Number(familyFirst?.[2] ?? versionFirst?.[1])
@@ -64,7 +65,12 @@ function claudeInfo(model: Model.Info) {
major,
minor,
manual: (major === 3 && minor === 7) || (major === 4 && minor < 6),
always: family === "fable" || family === "mythos" || id.toLowerCase().includes("mythos-preview"),
// Opus 5.5 and later reject disabled thinking.
always:
family === "fable" ||
family === "mythos" ||
id.toLowerCase().includes("mythos-preview") ||
(family === "opus" && (major > 5 || (major === 5 && minor >= 5))),
}
}
@@ -390,6 +396,7 @@ const bedrockConverse: Protocol = (model, support) => {
return fields({ reasoningConfig: { type: "enabled", maxReasoningEffort: effort } })
})
case "toggle":
if (claude && claudeInfo(model).always) return []
return claude
? toggle(fields({ thinking: { type: "disabled" } }), fields({ thinking: ADAPTIVE_THINKING }))
: toggle(fields({ reasoningConfig: { type: "disabled" } }), fields({ reasoningConfig: { type: "enabled" } }))
@@ -449,6 +456,7 @@ const bedrockAISDK: Protocol = (model, support) => {
: { reasoningConfig: { type: "enabled", maxReasoningEffort: effort } },
}))
case "toggle":
if (claude && claudeInfo(model).always) return []
return claude
? toggle(
{ settings: { additionalModelRequestFields: { thinking: { type: "disabled" } } } },
@@ -507,6 +515,7 @@ const sapAICore: Protocol = (model, support) => {
sap({ additionalModelRequestFields: { thinking: { type: "disabled" } } }),
sap({ additionalModelRequestFields: { thinking: { type: "enabled" } } }),
)
if (id.includes("anthropic") && claudeInfo(model).always) return []
if (id.includes("anthropic"))
return toggle(
sap({ additionalModelRequestFields: { thinking: { type: "disabled" } } }),
packages/core/test/variant.test.ts
+24
View File
@@ -104,6 +104,30 @@ test("recognizes Claude version spellings and future models", () => {
])
})
test("keeps thinking on for Claude Opus 5.5 and later", () => {
const supports: Variant.Support[] = [{ type: "toggle" }, { type: "effort", values: ["low", "high"] }]
const adaptive = ["low", "high"].map((effort) => ({
id: effort,
settings: { effort, thinking: { type: "adaptive", display: "summarized" } },
}))
for (const input of [
model("@opencode/ai/providers/cloudflare-ai-gateway", "anthropic/claude-opus-5.5"),
model("@opencode/ai/providers/anthropic", "claude-opus-5-5"),
model("@opencode/ai/providers/anthropic", "claude-opus-6"),
])
expect(resolve(input, supports)).toEqual(adaptive)
expect(
resolve(model("@opencode/ai/providers/amazon-bedrock", "us.anthropic.claude-opus-5-5-v1:0"), [{ type: "toggle" }]),
).toEqual([])
for (const id of ["claude-opus-5", "claude-opus-5-20260901"])
expect(resolve(model("@opencode/ai/providers/anthropic", id), supports)).toEqual([
{ id: "none", settings: { thinking: { type: "disabled" } } },
...adaptive,
])
})
test("spells Cloudflare AI Gateway variants for their upstream routes", () => {
const pkg = "@opencode/ai/providers/cloudflare-ai-gateway"
expect(resolve(model(pkg, "openai/gpt-5.4"), [{ type: "effort", values: ["low", "xhigh"] }])).toEqual([