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feat(ai): add reasoning token counts to Usage

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Add optional reasoning?: number to Usage as a subset of output. Populate
for Anthropic (output_tokens_details.thinking_tokens), OpenAI
Responses/Codex/Azure (output_tokens_details.reasoning_tokens), OpenAI
Completions (completion_tokens_details.reasoning_tokens), and Google
Generative AI / Vertex (thoughtsTokenCount). Bedrock Converse and Mistral
do not return a reasoning breakdown, so they stay unset.

closes #6057
This commit is contained in:
Mario Zechner
2026-06-25 10:34:47 +02:00
parent 5c76ae407d
commit d7868b0998
7 changed files with 23 additions and 0 deletions
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packages/ai/src/api/google-vertex.ts
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@@ -238,6 +238,7 @@ export const stream: StreamFunction<"google-vertex", GoogleVertexOptions> = (
(chunk.usageMetadata.candidatesTokenCount || 0) + (chunk.usageMetadata.thoughtsTokenCount || 0),
cacheRead: chunk.usageMetadata.cachedContentTokenCount || 0,
cacheWrite: 0,
reasoning: chunk.usageMetadata.thoughtsTokenCount || 0,
totalTokens: chunk.usageMetadata.totalTokenCount || 0,
cost: {
input: 0,