OpenAI Assistant API

OpenAI charged for PDF retrieval in the Assistant API despite stating the feature would be free until January 12, 2024. Developers incurred significantly inflated costs from repeated retrieval charges that contradicted official pricing claims.

The Assistant API automatically appends the entire conversation thread and PDFs to each message up to the 128k token limit, with no user control over context window management. OpenAI is considering this feature but has provided no timeline.