v2.39.0 (2026-09-03)

What's Changed

🚀 Features

• Add OpenAI gpt-6-astra model support by @dsfaccini in #8055

🐛 Bug Fixes

• Fix the context_subtree() exporter cache and its span-processor leaks by @dsfaccini in #7667
• Restore the Instrumentation spec option include_model_request_parameters and sharpen the undeclared-attribute merge error by @DouweM in #8046
• Detect Azure content-filter errors for AzureProvider and for AsyncAzureOpenAI clients on OpenAIProvider by @quinnarnold in #7922
• Emit speech finalized by a tool call on stream_transcripts() by @DouweM in #8062
• Attribute tool-returned media to its originating tool call when it can't ride the tool result by @dsfaccini in #7830
• Restore capability composition invariants by @dsfaccini in #8047

Full Changelog: v2.38.0...v2.39.0