GPT-5.3
OpenAIProprietary
1 model2026Up to 128K ctx
About
GPT-5.3 is an OpenAI model generation including Chat and Codex variants optimized for conversational use and software engineering.
Specifications(1 models)
| Model | Released | Context | Vision | Multimodal | Fn Calling | Tool Use | Structured Outputs |
|---|---|---|---|---|---|---|---|
| GPT-5.3 Chat | 2026-02 | 128K | Yes | Yes | Yes | Yes | Yes |
Frequently Asked Questions
- What is GPT-5.3?
- GPT-5.3 is an OpenAI model generation including Chat and Codex variants optimized for conversational use and software engineering.
- How many models are in the GPT-5.3 family?
- The GPT-5.3 family contains 1 model.
- What is the latest GPT-5.3 model?
- The latest model is GPT-5.3 Chat, released in 2026-02.
