Releases·Tool Release
pydantic-ai v2.37.0 adds glm-5.3-flash support and Z.AI fixes
Pydantic AI released v2.37.0 (2026-08-31), adding the glm-5.3-flash model and reworking the Z.AI test suite onto cassettes. The release also fixes Z.AI's non-standard finish_reason mapping and AG-UI streaming behavior, improving agent-framework compatibility with Z.AI models.
0 engagement1 sourceTue, Sep 1, 2026, 01:48 AM
AI Overview
- Adds `glm-5.3-flash` as a supported model and reworks the Z.AI test suite onto cassettes (PR #7887)
- Maps Z.AI's non-standard `finish_reason` values to standard ones (PR #7685)
- Emits an AG-UI `TEXT_MESSAGE_START` for the assistant message owning a response's tool calls (PR #7699)
- Preserves all conditions in pruned span queries (PR #7499)
Related
Releases·Tool Release
Pydantic AI v2.32.1 fixes nested run_sync, Anthropic thinking blocks
Pydantic AI v2.32.1, released on 2026-08-19, fixes critical bugs: rejecting nested run_sync() calls from synchronous callbacks, avoiding empty-signature Anthropic thinking blocks, and broadening callable support for FunctionModel. The release follows v2.32.0's features like xAI attachment search and OpenRouter web-search sources.
Pydantic AI v2.32.1, released on 2026-08-19, fixes critical bugs: rejecting nested run_sync() calls from synchronous callbacks, avoiding empty-signature Anthropic thinking blocks, and broadening callable support for FunctionModel. The release follows v2.32.0's features like xAI attachment search and OpenRouter web-search sources.
0404 engagement4 sourcesgithub, redditWed, Aug 19, 2026, 12:00 AM
Releases·Tool Release
pydantic-ai v2.42.0 adds GitHub Copilot provider, rejects invalid DeferredToolResults approvals
Pydantic released six consecutive pydantic-ai versions (v2.38.0–v2.43.0, 2026-09-03 to 2026-09-11). Highlights include support for OpenAI gpt-6-astra and gemini-3.8-flash, Claude Fable 5.1 and Mythos 5.1, a vLLM provider, a GitHub Copilot provider, ChatGPT/Codex subscription auth, context-window tracking, barge-in handling in realtime sessions, and an @agent.on_event listener API. The releases matter to practitioners building agents who need current model support, cost tracking, and realtime voice control.
Pydantic released six consecutive pydantic-ai versions (v2.38.0–v2.43.0, 2026-09-03 to 2026-09-11). Highlights include support for OpenAI gpt-6-astra and gemini-3.8-flash, Claude Fable 5.1 and Mythos 5.1, a vLLM provider, a GitHub Copilot provider, ChatGPT/Codex subscription auth, context-window tracking, barge-in handling in realtime sessions, and an @agent.on_event listener API. The releases matter to practitioners building agents who need current model support, cost tracking, and realtime voice control.
Updated Sat, Sep 12, 2026, 12:54 AM — v2.43.0 (2026-09-11) adds a first-run clai session banner and fixes OpenAI text-part boundaries after tool calls
0600 engagement6 sourcesgithubThu, Sep 3, 2026, 07:48 AM
Releases·Tool Release
Pydantic releases pydantic-ai v2.15.0 with GPT-5.6 prompt caching and Mistral inline files
Pydantic released version 2.15.0 of pydantic-ai on July 21, 2026. The update adds explicit prompt caching support for OpenAI's GPT-5.6, inline text-like file support in MistralModel prompts, and the ability to override tool-retry budgets at runtime. It also introduces DynamicCapability toolsets for durable execution with DBOS and Prefect.
Pydantic released version 2.15.0 of pydantic-ai on July 21, 2026. The update adds explicit prompt caching support for OpenAI's GPT-5.6, inline text-like file support in MistralModel prompts, and the ability to override tool-retry budgets at runtime. It also introduces DynamicCapability toolsets for durable execution with DBOS and Prefect.
Updated Thu, Jul 23, 2026, 02:25 AM — v2.15.0 adds GPT-5.6 prompt caching, Mistral inline files, and DynamicCapability toolsets for durable execution.
0404 engagement4 sourcesgithubTue, Jul 21, 2026, 12:00 AM
Releases·Tool Release
Pydantic AI v2.26.0 adds tool hiding, run cancellation, prompt-cache retention
Pydantic AI v2.26.0, released August 6, 2026, introduces support for hiding function tools until revealed via tool search or load_capability, first-party run cancellation, and a method to resolve effective prompt-cache retention. These features give developers finer control over tool exposure and runtime management.
Pydantic AI v2.26.0, released August 6, 2026, introduces support for hiding function tools until revealed via tool search or load_capability, first-party run cancellation, and a method to resolve effective prompt-cache retention. These features give developers finer control over tool exposure and runtime management.
2 engagement1 sourcegithubThu, Aug 6, 2026, 12:00 AM
Releases·Tool Release
Pydantic AI v2.23.0 adds cost tracking, Bedrock extra headers, Gemini image aliases
Pydantic AI v2.23.0 released on 2026-08-03, introducing cost tracking via RunUsage and UsageLimits, Bedrock support for extra headers, and restored stable Gemini image model aliases. It also adds native tool addition rendering for dynamic tools.
Pydantic AI v2.23.0 released on 2026-08-03, introducing cost tracking via RunUsage and UsageLimits, Bedrock support for extra headers, and restored stable Gemini image model aliases. It also adds native tool addition rendering for dynamic tools.
0 engagement2 sourcesgithubMon, Aug 3, 2026, 12:00 AM