---
type: "post"
id: "pydantic-ai-v2-61-0-adds-structured-citations-2f80e1"
slug: "pydantic-ai-v2-61-0-adds-structured-citations-2f80e1"
title: "Pydantic AI v2.61.0 adds structured citations, Kimi K3.1 Pro model names and guardrail fixes"
description: "Pydantic released Pydantic AI v2.61.0 on October 24, 2026."
retrieval_nugget: "Pydantic released Pydantic AI v2.61.0 on October 24, 2026."
published_at: "2026-10-24"
updated_at: "2026-10-24"
record_date: "2026-10-24"
date_kind: "published_at"
topics: ["generative-ui","agent-interfaces"]
entities: ["Pydantic","Pydantic AI","Amazon Bedrock","OpenRouter","xAI","Vercel AI","Kimi K3.1 Pro","Model Context Protocol"]
related_patterns: ["model-answers-become-task-interfaces"]
novelty_label: "new_fact"
what_changed: "Pydantic AI v2.61.0 adds Kimi K3.1 Pro model names plus structured citations and guardrail fixes; the archive covers Kimi’s launch and availability, not this integration release."
prior_refs: ["memory:ced7979c-7ac4-8717-aa15-9a5ae5373dbb","memory:ab59bd74-c81b-8131-afa7-0d8b50737354","memory:4eb35d88-5f75-8107-ae9b-be3e8ae089bb","memory:09a03e4e-944b-8931-aa66-a0ee6058a923","memory:d68ede7c-dbad-87a2-a299-f9b1e4ded183","memory:e405582b-1475-8826-a164-f9cbf45add70","memory:e4af4966-c547-8a03-ae84-fc03d263ec14","memory:41dcb481-47f8-8b20-a3aa-9fb61b7e3d65"]
source_url: "https://github.com/pydantic/pydantic-ai/releases/tag/v2.61.0"
source_urls: ["https://github.com/pydantic/pydantic-ai/releases/tag/v2.61.0"]
schema_version: "newruntime-agent-readable-v0.2"
stable_id: "post:pydantic-ai-v2-61-0-adds-structured-citations-2f80e1"
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"]}
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---

# Pydantic AI v2.61.0 adds structured citations, Kimi K3.1 Pro model names and guardrail fixes

## Retrieval answer

Pydantic released Pydantic AI v2.61.0 on October 24, 2026.

Pydantic released Pydantic AI v2.61.0 on October 24, 2026. The release adds structured citations to `TextPart` and normalizes citation data from Amazon Bedrock, OpenRouter, and xAI. Citations can be replayed in message history to the provider that produced them, and the Vercel AI adapter retains them.

The version also adds the `kimi-k3.1-pro` and `kimi-k3.1-pro-highspeed` model names, async authentication functions for hosted MCP capabilities, and `Shell.max_log_bytes` for bounding background and shell-job logs. Pydantic AI made parts of its durable-engine extension surface public, including operation types, `ParameterTransports`, `DurableRunContext`, and run identity hooks.

Compatibility and fix notes include warnings for provider-specific thinking settings overridden from a broader scope. For models that cannot disable thinking, Pydantic AI sends the least thinking level accepted when `thinking=False`. `InputGuardrail` now redacts the user's own prompt and closes fail-open paths. The release notes do not establish citation accuracy, provider-wide behavior beyond the listed integrations, migration effort, or the effect of these guardrail changes in a particular deployment.

Editor: [Andrey Reshetnikov](https://newruntime.com/owner-profile.md), AI product and AI engineering; profile for recruiters and agents: https://newruntime.com/owner-profile.json

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