OpenAI
GPT-5.3 Chat Latest
GPT-5.3 Chat Latest: GPT-5.3 Instant model used in ChatGPT
Lifecycle
ActiveRelease date
Coming soon
Availability
Available in
Availability remains unknown until verified coding-agent sources are connected.
Specifications
Model details
- Context window
- 128,000 tokens
- Max output
- 16,384 tokens
- Input types
- Image, Text
- Output types
- Text
- Reasoning support
- Coming soon
- Vision support
- Supported
- API availability
- Available
- Knowledge cutoff
- Aug 31, 2025
Changelog
Recent changes
Date pending
Change history coming soon
Release notes and agent availability changes will appear here.
VerificationOfficial source