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fix: omit parallel_tool_calls when not explicitly enabled (COM-406) #10671

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Merged
mrubens merged 1 commit into from
Jan 13, 2026
Merged

fix: omit parallel_tool_calls when not explicitly enabled (COM-406) #10671

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5 changes: 4 additions & 1 deletion src/api/providers/__tests__/openai-native-tools.spec.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -71,10 +71,13 @@ describe("OpenAiHandler native tools", () => {
function: expect.objectContaining({ name: "test_tool" }),
}),
]),
parallel_tool_calls: false,
}),
expect.anything(),
)
// Verify parallel_tool_calls is NOT included when parallelToolCalls is not explicitly true
// This is required for LiteLLM/Bedrock compatibility (see COM-406)
const callArgs = mockCreate.mock.calls[0][0]
expect(callArgs).not.toHaveProperty("parallel_tool_calls")
})
})

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28 changes: 16 additions & 12 deletions src/api/providers/openai.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -162,9 +162,10 @@ export class OpenAiHandler extends BaseProvider implements SingleCompletionHandl
...(reasoning && reasoning),
...(metadata?.tools && { tools: this.convertToolsForOpenAI(metadata.tools) }),
...(metadata?.tool_choice && { tool_choice: metadata.tool_choice }),
...(metadata?.toolProtocol === "native" && {
parallel_tool_calls: metadata.parallelToolCalls ?? false,
}),
...(metadata?.toolProtocol === "native" &&
metadata.parallelToolCalls === true && {
parallel_tool_calls: true,
}),
}

// Add max_tokens if needed
Expand Down Expand Up @@ -231,9 +232,10 @@ export class OpenAiHandler extends BaseProvider implements SingleCompletionHandl
: [systemMessage, ...convertToOpenAiMessages(messages)],
...(metadata?.tools && { tools: this.convertToolsForOpenAI(metadata.tools) }),
...(metadata?.tool_choice && { tool_choice: metadata.tool_choice }),
...(metadata?.toolProtocol === "native" && {
parallel_tool_calls: metadata.parallelToolCalls ?? false,
}),
...(metadata?.toolProtocol === "native" &&
metadata.parallelToolCalls === true && {
parallel_tool_calls: true,
}),
}

// Add max_tokens if needed
Expand Down Expand Up @@ -357,9 +359,10 @@ export class OpenAiHandler extends BaseProvider implements SingleCompletionHandl
temperature: undefined,
...(metadata?.tools && { tools: this.convertToolsForOpenAI(metadata.tools) }),
...(metadata?.tool_choice && { tool_choice: metadata.tool_choice }),
...(metadata?.toolProtocol === "native" && {
parallel_tool_calls: metadata.parallelToolCalls ?? false,
}),
...(metadata?.toolProtocol === "native" &&
metadata.parallelToolCalls === true && {
parallel_tool_calls: true,
}),
}

// O3 family models do not support the deprecated max_tokens parameter
Expand Down Expand Up @@ -392,9 +395,10 @@ export class OpenAiHandler extends BaseProvider implements SingleCompletionHandl
temperature: undefined,
...(metadata?.tools && { tools: this.convertToolsForOpenAI(metadata.tools) }),
...(metadata?.tool_choice && { tool_choice: metadata.tool_choice }),
...(metadata?.toolProtocol === "native" && {
parallel_tool_calls: metadata.parallelToolCalls ?? false,
}),
...(metadata?.toolProtocol === "native" &&
metadata.parallelToolCalls === true && {
parallel_tool_calls: true,
}),
}

// O3 family models do not support the deprecated max_tokens parameter
Expand Down
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