OpenAI: GPT-5.3 Chat
GPT-5.3 Chat is an update to ChatGPT's most-used model that makes everyday conversations smoother, more useful, and more directly helpful. It delivers more accurate answers with better contextualization and significantly...
Everything else
| Max output | 16K |
|---|---|
| Input / 1M | $1.75 |
| Output / 1M | $14 |
| Cache read / 1M | $0.175 |
| Cache write / 1M | — |
| 1M in + 1M out | $15.75 |
| Takes | text, image, file |
| Returns | text |
| Tools | yes |
| Reasoning | no |
| Open weights | no |
| Released | 2026-03-03 |
| Knowledge cutoff | — |
| Retires | 2026-08-10 |
| Catalog id | openai/gpt-5.3-chat |
Using it
In 00, this model is picked per agent — and per tier, so the model that answers your customers need not be the one that writes your code. Get 00.