pydantic-ai

v1.104.0 Feature

This release adds 1 notable feature for engineering teams evaluating rollout.

Published 5d AI Agents & Assistants

✓ No known CVEs patched

✓ No known CVEs patched in this version

Topics

agent-framework genai llm pydantic python

Summary

AI summary

Added Claude Opus 4.8 support.

Type	Severity	Summary	CVE
Feature	Low	Adds Claude Opus 4.8 support Adds Claude Opus 4.8 support Source: llm_adapter@2026-05-29 Confidence: high	—
Bugfix	Medium	Forwards `thinking=False` on hybrid OpenRouter/xAI/Bedrock routes Forwards `thinking=False` on hybrid OpenRouter/xAI/Bedrock routes Source: llm_adapter@2026-05-29 Confidence: high	—
Bugfix	Medium	Fixes Bedrock single-tool `tool_choice` cache preservation issue Fixes Bedrock single-tool `tool_choice` cache preservation issue Source: llm_adapter@2026-05-29 Confidence: high	—

Full changelog

Add Claude Opus 4.8 support by @dsfaccini in https://github.com/pydantic/pydantic-ai/pull/5709

Forward thinking=False on hybrid OpenRouter/xAI/Bedrock routes, aligning silent-drop with direct routes by @sarth6 in https://github.com/pydantic/pydantic-ai/pull/5433
Fix Bedrock single-tool tool_choice cache preservation by @dsfaccini in https://github.com/pydantic/pydantic-ai/pull/5674

Full Changelog: https://github.com/pydantic/pydantic-ai/compare/v1.103.0...v1.104.0

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About pydantic-ai

AI Agent Framework, the Pydantic way