GPT APIs
GPT-5.4 Structured Outputs Broke My Pydantic Schemas
The additionalProperties trap in GPT-5.4’s April refresh The April 2026 GPT-5.4 snapshot tightened how the OpenAI API enforces JSON Schema on the.
GPT News | Large Language Models in Practice
GPT News covers applied LLM engineering, RAG systems, and production AI integrations with working code examples.