pydantic-ai Releases

Enhances `ModelHTTPError` with `headers` and `retry_after` fields. Fixes external cancellation handling at run step boundaries and updates the FastMCP dependency range.

Jul 28, 2026

Introduces sandbox deployments, one-step `mastra build`, new Factory storage backends, a new `@mastra/factory` package, and agent runtime enhancements for durability and multi-turn evaluations.

Jul 27, 2026

Adds `AdvisorTool` support for Anthropic and OpenRouter, expands Google Cloud provider locations, and adds `external_web_access` option to OpenAI Responses WebSearchTool.

Jul 25, 2026

Enables support for arbitrary fields in `RequestUsage` and `RunUsage` for future pricing updates. Optimizes OpenTelemetry serialization and fixes `ContentFilterError` handling.

Jul 24, 2026

Adds Mistral prompt caching, `ToolFailed` status, optional `run_id`, Google Cloud Model Armor support, and new Gemini models. Fixes various durability and tool retry issues.

Jul 23, 2026

Adds explicit prompt caching for GPT-5.6, tool-retry budget override, and DynamicCapability toolsets support for durable execution. Deprecates Exa search common tools.

Jul 22, 2026

Fixes MCP instructions fetching under `DBOSDurability` and temporarily withdraws durable wrapper-agent deprecations to aid migration.

Jul 21, 2026

Introduces `TemporalDurability`, `DBOSDurability`, and `PrefectDurability` capabilities to replace deprecated wrapper agents. Adds Mistral `reasoning_effort` support.

Jul 21, 2026

This release focuses on enhancing observability with new OpenTelemetry settings and caching metrics, introduces hooks for model resolution, and fixes several streaming and context handling bugs.

Jul 18, 2026

This release introduces support for the Moonshot AI `kimi-k3` model and enhances event handling with new events for tracking deferred tool calls and message enqueuing. It also resolves several bugs related to tool binding, serialization, and streaming outputs for providers like Mistral and Google.

Jul 17, 2026

This release focuses on improving error handling and onboarding by exporting the `HistoryProcessor` and adding actionable hints to errors. It also addresses several bug fixes regarding streaming validation, credential suggestions, and schema transformation for Anthropic and Bedrock providers.

Jul 16, 2026

This release significantly enhances agent durability with crash recovery capabilities, introduces scoped sessions for parallel execution, and expands the platform ecosystem with new workspace providers and a public code SDK.

Jul 15, 2026

This release improves provider compatibility by making `message_history` provider-valid out of the box to repair tool-call/result pairing. It also adds support for OpenAI background mode and Anthropic's `stop_reason=pause_turn`, alongside several bug fixes and a security dependency update.

Jul 15, 2026

A patch release addressing critical security vulnerabilities and stability issues, including a ReDoS fix via `soupsieve` and improvements to timeout handling and model availability.

Jul 14, 2026

Adds multi-screen album casting support, improves account deletion flow with clearer confirmations, and implements automatic cache cleanup for device storage.

Jul 13, 2026

This release acknowledges a security advisory affecting AG-UI, introduces a new `/usage` CLI command for tracking tokens, adds support for GPT-5.6 models and reasoning mode, and exposes usage limits in `RunContext`. It also includes several bug fixes related to Anthropic Files API, `repr()` crashes, cancellation deadlocks, and output strategies.

Jul 11, 2026

A security patch release on the v1 line addressing a moderate vulnerability (GHSA-jpr8-2v3g-wgf9) in the AG-UI `UIAdapter.sanitize_messages` method. The patch prevents dangling tool calls from being re-executed with client-chosen arguments when trailing messages are dropped during sanitization.

Jul 11, 2026

This patch release resolves a performance regression affecting the Qwen-Image model and fixes the default operator priority for RMSNorm.

Jul 10, 2026

Adds `--exclude-albums` flag for exports, admin email testing command, and improved passkey/email-OTP compatibility. Fixes handling of tilde and relative paths.

Jul 10, 2026

This release introduces enhanced CLI and web UI capabilities while addressing various validation and response handling bugs.

Jul 10, 2026