POST /v1/chat/completionsGPT-5.3 Chat
gpt-5.3-chatGPT-5.3 Chat is the API-facing name for GPT-5.3 Instant, the ChatGPT snapshot designed to make everyday conversations smoother and more directly useful. OpenAI describes the update as improving answer accuracy, web-search contextualization, and conversational flow by reducing unnecessary caveats, dead ends, and overly cautious phrasing. It supports text and image input with text output, but OpenAI’s API docs mark it as deprecated in favor of newer GPT models.
Total Context
128Ktokens
Max Output
16.4Ktokens
Released
Mar 3, 2026
Modalities
GPT-5.3 Chat Price
| Input Price | Output Price | Cache Read |
|---|---|---|
| $1.75/M | $14/M | $0.175/M |
GPT-5.3 Chat API
GPT-5.3 Chat FAQ
GPT-5.3 Chat: capabilities, use cases, limits, and TokenHub guidance.
What does GPT-5.3 Chat focus on?+
GPT-5.3 Chat is a OpenAI model for the ChatGPT-oriented GPT-5.3 Instant snapshot.
Which projects fit GPT-5.3 Chat?+
Best for general conversation, image and video understanding and customer-facing workflows, especially when reproducing an older workflow is the priority.
What is special about GPT-5.3 Chat?+
Key strength: the conversational behavior of the GPT-5.3 Instant snapshot.
When is another model better?+
This ChatGPT snapshot is deprecated and should not anchor a new production API design. Use GPT-5.5 for new integrations.
How do I avoid ID mistakes?+
Confirm availability; use the current recommended model for new integrations.
Media and Discussions
Selected public videos and posts related to this model.
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