pydantic-ai Releases

Adds an option to disable schema prompts and fixes various streaming, Google, MCP, and Anthropic issues.

Mar 2, 2026

This release adds Gemini 3.1 Pro Preview support, logprob support for Gemini models, and introduces an args_validator parameter for tools enabling pre-execution validation. Multiple bug fixes are included for MCP tools caching, Cohere typing, Anthropic Bedrock JSON schema output, and message identification.

Feb 23, 2026

This release adds tool approval integration for Vercel AI adapter and introduces new evaluation types including LinePlot analysis, ROCAUCEvaluator, and KolmogorovSmirnovEvaluator. Bug fixes address documentation issues and error handling for Groq and content filter refusals.

Feb 19, 2026

This release adds official Python 3.14 support and upgrades the Anthropic dependency to 0.80.0 with Claude Sonnet 4.6 support. The release focuses on dependency updates and new model compatibility.

Feb 18, 2026

This release adds video_url support to OpenRouterModel and implements instrumentation version 4 to match OpenTelemetry GenAI semantic conventions for multimodal input. Bug fixes address AG-UI parent_message_id handling and streaming iteration issues.

Feb 17, 2026

Introduces OAUTHBEARER authentication for Kafka, new output types for MongoDB, worker scaling based on load, and TLS support for Postgres connectors.

Feb 16, 2026

This release adds a Model.model_id property returning provider:model format, an opt-in flag for aggregated usage attribute names, and enhances the Contains evaluator to support pydantic.BaseModel. Bug fixes address XAI AsyncClient event loop handling.

Feb 14, 2026

Enhances evaluation capabilities with report-level evaluators and experiment-wide analyses, and adds extra headers for Google provider.

Feb 11, 2026

Fixes a base64 decoding issue for A2A FilePart used in image and file uploads.

Feb 10, 2026

Introduces support for Claude Opus 4.6 and new Anthropic settings, alongside security improvements regarding local network file downloads.

Feb 6, 2026

A patch release addressing compatibility issues with OpenAI Responses and fixing deserialization errors for `MultiModalContent`.

Feb 5, 2026

Adds concurrency limiting for Agents and Models to improve resource management and prevent overload.

Feb 4, 2026

Automates gateway base URL configuration by inferring it from the token region for easier setup.

Feb 4, 2026

Adds controls for OpenAI data retention and output validation retries, alongside Vercel AI SDK v5 compatibility fixes.

Feb 3, 2026

A major update introducing new model vendors, native xAI support, and integrations like Google Drive and Inworld.

Feb 2, 2026

Adds customization options for the Chat UI and fixes issues with Gemini tool calls and Bedrock caching when messages end on non-text content.

Jan 31, 2026

Exposes usage limits and model settings to CLI users and fixes serialization issues in Temporal workflows.

Jan 29, 2026

Adds parallel tool call support in DBOSAgent, new Bedrock embedding models, and aligns types with AI SDK v6.

Jan 29, 2026

This release introduces `allowed_domains` support for WebSearchTool, adds a `continuous_usage_stats` model setting for OpenAI, and applies model settings to Mistral streaming JSON mode. It also includes bug fixes for GPT-5.1+ sampling parameters and OpenAI-compatible embeddings APIs.

Jan 27, 2026

Ensures that thought signatures and provider metadata survive a round trip through a Vercel AI frontend, improving compatibility and data integrity.

Jan 24, 2026