Pydantic AI Updates: April 2, 2026

1. Pydantic AI v1.76.0 Adds ImageGeneration Auto-Fallback to Subagents

Pydantic. Pydantic AI released v1.76.0 on April 2, 2026, adding an ImageGeneration capability with automatic fallback to a subagent with an image-generation model if the main model lacks native image generation support. The release also adds an agent reference to RunContext, includes a gen_ai.operation.name span attribute in agent runs for improved observability, and updates the Mistral integration to the mistralai SDK v2. Source

2. Pydantic AI v1.75.0 Adds Gemini Embedding Support and Flex PayGo for VertexAI

Pydantic. Pydantic AI released v1.75.0 on April 1, 2026, adding Gemini embedding type support with configurable limits and Flex PayGo support for VertexAI, expanding the framework’s multicloud coverage. The release also fixes a cache control TTL stripping bug in Bedrock clients, enhances the Vercel AI adapter to handle DataUIPart in user messages, improves system message insertion logic, and standardizes error handling between synchronous and streaming execution paths. Seven contributors were involved, including six new ones. Source