pydantic-ai

v1.105.0 Feature

This release adds 2 notable features for engineering teams evaluating rollout.

Published 1d AI Agents & Assistants

✓ No known CVEs patched

✓ No known CVEs patched in this version

Topics

agent-framework genai llm pydantic python

Summary

AI summary

Updates 🚀 Features, 🐛 Bug Fixes, and feat across a mixed release.

Type	Severity	Summary	CVE
Feature	Medium	Adds on-demand (deferred loading) capabilities for instructions, tools, model settings, and hooks. Adds on-demand (deferred loading) capabilities for instructions, tools, model settings, and hooks. Source: llm_adapter@2026-06-02 Confidence: high	—
Feature	Medium	Adds Grok 4.3 `reasoning_effort` support and current xAI model names. Adds Grok 4.3 `reasoning_effort` support and current xAI model names. Source: llm_adapter@2026-06-02 Confidence: high	—
Bugfix	Medium	Fixes `gateway/` model construction inside a Temporal workflow by passing provider SDKs through the sandbox. Fixes `gateway/` model construction inside a Temporal workflow by passing provider SDKs through the sandbox. Source: llm_adapter@2026-06-02 Confidence: high	—
Bugfix	Medium	Fixes `GoogleModelSettings.google_cached_content` to omit `system_instruction`, `tools`, and `tool_config` from requests. Fixes `GoogleModelSettings.google_cached_content` to omit `system_instruction`, `tools`, and `tool_config` from requests. Source: llm_adapter@2026-06-02 Confidence: high	—

Full changelog

feat: On-demand (deferred loading) capabilities, including instructions, tools, model settings, and hooks by @adtyavrdhn in https://github.com/pydantic/pydantic-ai/pull/5230
Add Grok 4.3 reasoning_effort support and current xAI model names by @adtyavrdhn in https://github.com/pydantic/pydantic-ai/pull/5454

Fix gateway/ model construction inside a Temporal workflow by passing provider SDKs through the sandbox by @adtyavrdhn in https://github.com/pydantic/pydantic-ai/pull/5733
Fix GoogleModelSettings.google_cached_content so request omits system_instruction, tools, and tool_config by @gaurav0107 in https://github.com/pydantic/pydantic-ai/pull/5681

@gaurav0107 made their first contribution in https://github.com/pydantic/pydantic-ai/pull/5681

Full Changelog: https://github.com/pydantic/pydantic-ai/compare/v1.104.0...v1.105.0

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About pydantic-ai

AI Agent Framework, the Pydantic way

v1.95.0 rename ‘built-in tools’ to ‘native tools’, deprecate old fields, register via capabilities=[NativeTool(...)]