PostHog/posthog-js @posthog/ai@8.10.4

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8.10.4

Patch Changes

• #4818 475743c Thanks @bernatixer! - fix(ai): only record a service tier the provider actually served. The requested service_tier no longer reaches $ai_model_parameters from any capture path — OpenAI error paths, the LangChain callback, and Anthropic events (whose 'auto'/'standard_only' request values were previously recorded) — so cost processing cannot price tokens at an unconfirmed tier. The LangChain callback now reads the served tier from the response (message response_metadata or generationInfo, depending on the adapter), and OpenAI and LangChain generations additionally emit the served tier as the explicit $ai_service_tier event property, which cost processing prices from.
  (2026-09-10)