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-rw-r--r--packages/opencode/src/provider/transform.ts35
-rw-r--r--packages/opencode/test/provider/transform.test.ts111
2 files changed, 144 insertions, 2 deletions
diff --git a/packages/opencode/src/provider/transform.ts b/packages/opencode/src/provider/transform.ts
index dcc2605ab..be06340d6 100644
--- a/packages/opencode/src/provider/transform.ts
+++ b/packages/opencode/src/provider/transform.ts
@@ -377,6 +377,31 @@ export namespace ProviderTransform {
case "@ai-sdk/deepinfra":
// https://v5.ai-sdk.dev/providers/ai-sdk-providers/deepinfra
case "@ai-sdk/openai-compatible":
+ // When using openai-compatible SDK with Claude/Anthropic models,
+ // we must use snake_case (budget_tokens) as the SDK doesn't convert parameter names
+ // and the OpenAI-compatible API spec uses snake_case
+ if (
+ model.providerID === "anthropic" ||
+ model.api.id.includes("anthropic") ||
+ model.api.id.includes("claude") ||
+ model.id.includes("anthropic") ||
+ model.id.includes("claude")
+ ) {
+ return {
+ high: {
+ thinking: {
+ type: "enabled",
+ budget_tokens: 16000,
+ },
+ },
+ max: {
+ thinking: {
+ type: "enabled",
+ budget_tokens: 31999,
+ },
+ },
+ }
+ }
return Object.fromEntries(WIDELY_SUPPORTED_EFFORTS.map((effort) => [effort, { reasoningEffort: effort }]))
case "@ai-sdk/azure":
@@ -656,9 +681,15 @@ export namespace ProviderTransform {
const modelCap = modelLimit || globalLimit
const standardLimit = Math.min(modelCap, globalLimit)
- if (npm === "@ai-sdk/anthropic" || npm === "@ai-sdk/google-vertex/anthropic") {
+ // Handle thinking mode for @ai-sdk/anthropic, @ai-sdk/google-vertex/anthropic (budgetTokens)
+ // and @ai-sdk/openai-compatible with Claude (budget_tokens)
+ if (npm === "@ai-sdk/anthropic" || npm === "@ai-sdk/google-vertex/anthropic" || npm === "@ai-sdk/openai-compatible") {
const thinking = options?.["thinking"]
- const budgetTokens = typeof thinking?.["budgetTokens"] === "number" ? thinking["budgetTokens"] : 0
+ // Support both camelCase (for @ai-sdk/anthropic) and snake_case (for openai-compatible)
+ const budgetTokens =
+ typeof thinking?.["budgetTokens"] === "number" ? thinking["budgetTokens"] :
+ typeof thinking?.["budget_tokens"] === "number" ? thinking["budget_tokens"] :
+ 0
const enabled = thinking?.["type"] === "enabled"
if (enabled && budgetTokens > 0) {
// Return text tokens so that text + thinking <= model cap, preferring 32k text when possible.
diff --git a/packages/opencode/test/provider/transform.test.ts b/packages/opencode/test/provider/transform.test.ts
index b818ab98c..22d1a7070 100644
--- a/packages/opencode/test/provider/transform.test.ts
+++ b/packages/opencode/test/provider/transform.test.ts
@@ -267,6 +267,56 @@ describe("ProviderTransform.maxOutputTokens", () => {
expect(result).toBe(OUTPUT_TOKEN_MAX)
})
})
+
+ describe("openai-compatible with thinking options (snake_case)", () => {
+ test("returns 32k when budget_tokens + 32k <= modelLimit", () => {
+ const modelLimit = 100000
+ const options = {
+ thinking: {
+ type: "enabled",
+ budget_tokens: 10000,
+ },
+ }
+ const result = ProviderTransform.maxOutputTokens("@ai-sdk/openai-compatible", options, modelLimit, OUTPUT_TOKEN_MAX)
+ expect(result).toBe(OUTPUT_TOKEN_MAX)
+ })
+
+ test("returns modelLimit - budget_tokens when budget_tokens + 32k > modelLimit", () => {
+ const modelLimit = 50000
+ const options = {
+ thinking: {
+ type: "enabled",
+ budget_tokens: 30000,
+ },
+ }
+ const result = ProviderTransform.maxOutputTokens("@ai-sdk/openai-compatible", options, modelLimit, OUTPUT_TOKEN_MAX)
+ expect(result).toBe(20000)
+ })
+
+ test("returns 32k when thinking type is not enabled", () => {
+ const modelLimit = 100000
+ const options = {
+ thinking: {
+ type: "disabled",
+ budget_tokens: 10000,
+ },
+ }
+ const result = ProviderTransform.maxOutputTokens("@ai-sdk/openai-compatible", options, modelLimit, OUTPUT_TOKEN_MAX)
+ expect(result).toBe(OUTPUT_TOKEN_MAX)
+ })
+
+ test("returns 32k when budget_tokens is 0", () => {
+ const modelLimit = 100000
+ const options = {
+ thinking: {
+ type: "enabled",
+ budget_tokens: 0,
+ },
+ }
+ const result = ProviderTransform.maxOutputTokens("@ai-sdk/openai-compatible", options, modelLimit, OUTPUT_TOKEN_MAX)
+ expect(result).toBe(OUTPUT_TOKEN_MAX)
+ })
+ })
})
describe("ProviderTransform.schema - gemini array items", () => {
@@ -1494,6 +1544,67 @@ describe("ProviderTransform.variants", () => {
expect(result.low).toEqual({ reasoningEffort: "low" })
expect(result.high).toEqual({ reasoningEffort: "high" })
})
+
+ test("Claude via LiteLLM returns thinking with snake_case budget_tokens", () => {
+ const model = createMockModel({
+ id: "anthropic/claude-sonnet-4-5",
+ providerID: "anthropic",
+ api: {
+ id: "claude-sonnet-4-5-20250929",
+ url: "http://localhost:4000",
+ npm: "@ai-sdk/openai-compatible",
+ },
+ })
+ const result = ProviderTransform.variants(model)
+ expect(Object.keys(result)).toEqual(["high", "max"])
+ expect(result.high).toEqual({
+ thinking: {
+ type: "enabled",
+ budget_tokens: 16000,
+ },
+ })
+ expect(result.max).toEqual({
+ thinking: {
+ type: "enabled",
+ budget_tokens: 31999,
+ },
+ })
+ })
+
+ test("Claude model (by model.id) via openai-compatible uses snake_case", () => {
+ const model = createMockModel({
+ id: "litellm/claude-3-opus",
+ providerID: "litellm",
+ api: {
+ id: "claude-3-opus-20240229",
+ url: "http://localhost:4000",
+ npm: "@ai-sdk/openai-compatible",
+ },
+ })
+ const result = ProviderTransform.variants(model)
+ expect(Object.keys(result)).toEqual(["high", "max"])
+ expect(result.high).toEqual({
+ thinking: {
+ type: "enabled",
+ budget_tokens: 16000,
+ },
+ })
+ })
+
+ test("Anthropic model (by model.api.id) via openai-compatible uses snake_case", () => {
+ const model = createMockModel({
+ id: "custom/my-model",
+ providerID: "custom",
+ api: {
+ id: "anthropic.claude-sonnet",
+ url: "http://localhost:4000",
+ npm: "@ai-sdk/openai-compatible",
+ },
+ })
+ const result = ProviderTransform.variants(model)
+ expect(Object.keys(result)).toEqual(["high", "max"])
+ expect(result.high.thinking.budget_tokens).toBe(16000)
+ })
})
describe("@ai-sdk/azure", () => {