fix(core): Fix and add missing cache attributes in Vercel AI #17982
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JPeer264
reviewed
Oct 21, 2025
| * The number of cached input tokens that were used | ||
| * @see https://ai-sdk.dev/docs/ai-sdk-core/telemetry#basic-llm-span-information | ||
| */ | ||
| export const AI_USAGE_CACHED_INPUT_TOKENS_ATTRIBUTE = 'ai.usage.cachedInputTokens'; |
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l: I couldn't find the ai.usage.cachedInputTokens in the given docs. Not sure if that is wanted
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it exists in their otel attributes, unfortunately not everything is documented.
JPeer264
approved these changes
Oct 21, 2025
size-limit report 📦
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node-overhead report 🧳Note: This is a synthetic benchmark with a minimal express app and does not necessarily reflect the real-world performance impact in an application.
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RulaKhaled
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rolaabuhasna/js-1035-vercelai-instrumentation-missing-cached-token-usage-data
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With the relay now handling cache token attributes (instead of scrubbing them), some Anthropic related token attributes were still missing. This PR adds the missing cache attributes and corrects the types in the Anthropic provider metadata used for extracting token data.
Fixes: #17890