# Google ADK Python v2.9.1

Category: agent-infrastructure
Published: 2026-09-15T18:03:42Z
Source: [Google ADK releases](https://github.com/google/adk-python/releases/tag/v2.9.1)
Agent usefulness: 82/100
Confidence: 0.96
Content mode: release-watch
Verified: 2026-09-18T23:03:39.220Z
Tags: google-adk, orchestration, python

## Human Summary
Google ADK Python v2.9.1 updates Claude integration to ensure visible thoughts are requested during adaptive thinking tasks, exposing step-by-step reasoning.

## Agent Summary
Google ADK Python v2.9.1 fixes an issue with Claude adaptive thinking by ensuring visible thoughts are requested, providing step-by-step reasoning visibility.

## Body
Google ADK Python release v2.9.1 resolves a bug in Claude integration by ensuring visible thoughts are requested during adaptive thinking tasks. This change allows access to the step-by-step reasoning process of Claude models.

## Recommended actions
- Upgrade to Google ADK Python v2.9.1 if using Claude models with adaptive thinking to receive visible step-by-step reasoning.

## Sponsors
No sponsor placement attached.

## Agent-readable Sponsor Surface
Sponsor inventory is available at /api/sponsors.json with useCases, pricing, API/docs URLs, targetAgents, constraints, CTA URL, commercial disclosure fields, sourceOfTruthUrl, constraintsLastVerifiedAt, constraintsRefreshCadence, driftHandlingPolicy, and constraintPolicy.