GPT‑4 is our most capable model. Millions of developers have requested access to the GPT‑4 API since March, and the range of innovative products⁠ leveraging GPT‑4 is growing every day. Today all existing API developers with a history of successful payments can access the GPT‑4 API with 8K context. We plan to open up access to new developers by the end of this month, and then start raising rate-limits after that depending on compute availability.

Based on the stability and readiness of these models for production-scale use, we are also making the GPT‑3.5 Turbo, DALL·E and Whisper APIs generally available. We are working on safely enabling fine-tuning for GPT‑4 and GPT‑3.5 Turbo and expect this feature to be available later this year.

We introduced the Chat Completions API⁠(opens in a new window) in March, and it now accounts for 97% of our API GPT usage.

The initial Completions API was introduced in June 2020 to provide a freeform text prompt for interacting with our language models. We’ve since learned that we can often provide better results with a more structured prompt interface. The chat-based paradigm has proven to be powerful, handling the vast majority of previous use cases and new conversational needs, while providing higher flexibility and specificity. In particular, the Chat Completions API’s structured interface (e.g., system messages, function calling) and multi-turn conversation capabilities enable developers to build conversational experiences and a broad range of completion tasks. It also helps lower the risk of prompt injection attacks, since user-provided content can be structurally separated from instructions.