by OpenAI
GPT-5.3Chat refers to the GPT-5.3 snapshot currently used in ChatGPT and is optimized for conversational use cases. While GPT-5.2 is recommended for most API applications, GPT-5.3Chat is ideal for testing the latest improvements in chat-based interactions.
GPT-5.3Chat refers to the GPT-5.3 snapshot currently used in ChatGPT and is optimized for conversational use cases. While GPT-5.2 is recommended for most API applications, GPT-5.3Chat is ideal for testing the latest improvements in chat-based interactions.
gpt-5.3-chat-latest has a 128,000 token context window.
On AIHubMix, gpt-5.3-chat-latest costs $1.75 per million input tokens and $14 per million output tokens. Cached input reads are billed at $0.18 per million tokens.
gpt-5.3-chat-latest accepts text and image input.
gpt-5.3-chat-latest supports function calling and structured outputs. Per-protocol parameter support is listed in the capability table on this page.
gpt-5.3-chat-latest is available through the AIHubMix unified API. The API is OpenAI-compatible: point your OpenAI SDK at https://aihubmix.com/v1, use your AIHubMix API key, and set the model name to gpt-5.3-chat-latest — no other code changes needed.
gpt-5.3-chat-latest is developed by OpenAI. AIHubMix aggregates it alongside models from other providers behind one API and one bill.
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Use gpt-5.3-chat-latest via the AIHubMix unified API — one interface for every major LLM.