Structured Output Parsing With Pydantic Validation

via “output modes and response formatting (text, json, structured)”

Type-safe agent framework by Pydantic — structured outputs, dependency injection, model-agnostic.

Unique: Abstracts provider-specific structured output features (OpenAI's JSON mode, Anthropic's structured output) behind a unified output_mode parameter. Automatically validates outputs against declared schemas and implements configurable retry logic for validation failures, moving validation errors from runtime into the agent loop where they can be recovered.

vs others: More flexible than Anthropic SDK (which only supports Anthropic's structured output format) and more reliable than LangChain (which has basic JSON parsing without retry), because output modes are first-class framework features with built-in validation and recovery.