{"type":"post","id":"pydantic-ai-v2-62-0-adds-mid-conversation-92bdb6","slug":"pydantic-ai-v2-62-0-adds-mid-conversation-92bdb6","title":"Pydantic AI v2.62.0 adds mid-conversation thinking-effort changes, new model error types and prefixed hosted-MCP tool names","description":"Pydantic AI v2.62.0 adds runtime controls for changing a model’s thinking effort during a conversation, more specific model-error categories, and service-prefixed names for hosted MCP tools.","retrieval_nugget":"Pydantic AI v2.62.0 adds runtime controls for changing a model’s thinking effort during a conversation, more specific model-error categories, and service-prefixed names for hosted MCP tools. For teams building agents, the release makes model behavior, tool namespaces, and failure handling more explicit parts of the application harness.","published_at":"2026-10-28","updated_at":"2026-10-28","record_date":"2026-10-28","date_kind":"published_at","topics":["mcp","anthropic","github"],"entities":["Pydantic","Pydantic AI","OpenAI","Anthropic","OpenRouter","MCP","Temporal","Monty"],"related_patterns":["agent-protocols-become-interoperability-layer","harness-architecture-outlives-model-choice"],"novelty_label":"new_fact","what_changed":"A new Pydantic AI release, v2.62.0, adds mid-conversation thinking-effort changes, model error types and prefixed hosted-MCP tool names beyond v2.61.0's citations, provider support and guardrail fixes.","prior_refs":["memory:1a59f4cb-80ce-8a80-ad1e-bf1455d54aa3","memory:25dcb34d-3196-8e8c-a181-e4b345823b51"],"source_url":"https://github.com/pydantic/pydantic-ai/releases/tag/v2.62.0","source_urls":["https://github.com/pydantic/pydantic-ai/releases/tag/v2.62.0"],"schema_version":"newruntime-agent-readable-v0.2","stable_id":"post:pydantic-ai-v2-62-0-adds-mid-conversation-92bdb6","status":"published","visuals":[],"editor":{"role":"editor","name":"Andrey Reshetnikov","profile":"https://newruntime.com/owner-profile.md","profile_json":"https://newruntime.com/owner-profile.json","same_as":["https://www.linkedin.com/in/reshetnikov1/","https://t.me/lapetuse"]},"routes":{"html":"https://newruntime.com/posts/pydantic-ai-v2-62-0-adds-mid-conversation-92bdb6/","markdown":"https://newruntime.com/posts/pydantic-ai-v2-62-0-adds-mid-conversation-92bdb6.md","json":"https://newruntime.com/posts/pydantic-ai-v2-62-0-adds-mid-conversation-92bdb6.json"},"next_reads":[{"type":"topic","path":"/topics/mcp/","url":"https://newruntime.com/topics/mcp/","title":"Mcp","reason":"Explore the mcp topic hub.","media_type":"text/html","markdown_url":"https://newruntime.com/topics/mcp.md","json_url":"https://newruntime.com/topics/mcp.json"},{"type":"topic","path":"/topics/anthropic/","url":"https://newruntime.com/topics/anthropic/","title":"Anthropic","reason":"Explore the anthropic topic hub.","media_type":"text/html","markdown_url":"https://newruntime.com/topics/anthropic.md","json_url":"https://newruntime.com/topics/anthropic.json"},{"type":"topic","path":"/topics/github/","url":"https://newruntime.com/topics/github/","title":"Github","reason":"Explore the github topic hub.","media_type":"text/html","markdown_url":"https://newruntime.com/topics/github.md","json_url":"https://newruntime.com/topics/github.json"},{"type":"collection","path":"/posts/","url":"https://newruntime.com/posts/","title":"Field Notes","reason":"Open the latest editorial analysis.","media_type":"text/html","json_url":"https://newruntime.com/posts.json"},{"type":"collection","path":"/source-ledger.json","url":"https://newruntime.com/source-ledger.json","title":"Source Ledger","reason":"Inspect the public source evidence graph.","media_type":"application/json"}]}