GPT-5.3 Chat
openai/gpt-5.3-chat-20260303
OpenAI: GPT-5.3 Chat is a model from OpenAI that accepts text, image, and file inputs and generates text output. It supports tool usage, has a context length of 128,000 tokens, and is priced at $1.75 per million input tokens and $14 per million output tokens. The model does not support reasoning, its weights are not open, and it was released on 2026-03-04.
- tool use
- structured outputs
At a glance
Specifications
What the API gives you
- Context window
- 128K tokens
- Max output
- 16K tokens
- Input price
- $1.75 / 1M tokens
- Output price
- $14 / 1M tokens
- Cache read
- $0.17 / 1M tokens
- Modalities
- text, image, file → text
- Knowledge cutoff
- —
- Released
- Mar 4, 2026
Recommendation coverage
Where this model appears
Not currently included in a published recommendation. This means the available task-specific evidence did not support a ranking yet—not that the model was reviewed and rejected.
Measured evidence
Public benchmark record
- LMArena Text
- 1484 Elo2026-07-20
LMArena data licensed CC-BY-4.0. Aider (Apache-2.0) and SWE-bench (MIT) are open.
Catalog data via OpenRouter and models.dev. Last checked within the past 6 hours.