Chat Latest
Chat Latest is a moving alias for the Instant model used in ChatGPT. OpenAI regularly updates its underlying snapshot rather than treating it as a fixed release.
A moving alias trades stability for product alignment
The API page lists text and image input, text output and a 400,000-token total window. The separate maximum input is 272,000 tokens. OpenAI directs production API users toward its dedicated API models instead of relying on this changing ChatGPT alias.Chat Latest official model documentation
Separate product exploration from a stable integration
Practical guidance. Use a fixed model choice when repeatable behavior matters to an application. If exploring this alias, record the review date and compare outputs after an update. Do not assume a ChatGPT product setting is also an API setting.
Specifications & access
| Detail | Value and conditions |
|---|---|
| Access | API |
| Model identifiers | chat-latest |
| Context window | 400,000 tokens Published model context; input and output share this budget Chat Latest official model documentation |
| Maximum output | 128,000 tokens Published maximum output; bounded by the remaining context Chat Latest official model documentation |
| Input price | 5 USD per million tokens Standard text processing at the reviewed date Chat Latest official model documentation |
| Output price | 30 USD per million tokens Standard text processing at the reviewed date Chat Latest official model documentation |
| Input and output | text, image in; text outChat Latest official model documentation |
| Maximum input | 272,000 tokensChat Latest official model documentation |
| API routes | Chat Completions (v1/chat/completions); Responses (v1/responses)Chat Latest official model documentation |