Pydantic AI Updates: August 8, 2026

1. Pydantic AI v2.27.0 Adds a Snowflake Cortex Provider

Pydantic AI. Pydantic AI v2.27.0 introduces SnowflakeModel and SnowflakeProvider for running agents against Snowflake Cortex, letting teams keep model calls inside their Snowflake data environment. The release also adds an xai_agent_count setting to XaiModelSettings and implements CompactionPart round-trip support through the Vercel AI and AG-UI adapters, improving fidelity when conversation history is compacted and passed across those integrations. The Snowflake addition is the notable one, extending Pydantic AI’s provider coverage into the data-warehouse-native inference space. Source

2. Pydantic AI Patches Unbounded Memory Use in web_fetch and Media Downloads

Pydantic AI. A backported release, v1.107.2, fixes a vulnerability (GHSA-v2xh-2vp8-57h8) where downloading remote content through the local web_fetch tool or FileUrl media downloads could consume unbounded memory, enforcing a default 50 MiB cap on response bodies. The issue is a denial-of-service risk for agents that fetch attacker-influenced URLs, since a large or streaming response could exhaust host memory. Teams running agents with web or file-fetch tools enabled on the 1.x line should upgrade. Source