Pricing, context window and lifecycle for openai/gpt-5.3-chat, tracked from what the vendor publishes.
2026-08-10 - this model has a published shutdown date. If your product calls it, you have a migration deadline.
To find every place that calls it before then:
curl -sO https://neosignal-ai.vercel.app/check.py
python check.py .
It names every model your repository calls that is already gone, and exits non-zero so the next one fails the build instead of production.
| Input | $1.75 |
| Output | $14.00 |
| Cache read | $0.175 |
| Model ID | openai/gpt-5.3-chat |
| Vendor | OpenAI |
| Context window | 128,000 tokens |
| Knowledge cutoff | - |
| End of life | 2026-08-10 |
| Date from | catalogue entry |
max_completion_tokens, max_tokens, response_format, seed, structured_outputs, tool_choice, tools