gpt-5.4-pro · OpenAI
Please note: this model is extremely expensive and very slow. If a request fails due to network issues, you may still be charged heavily; we cannot refund charges incurred by requests to this model. GPT-5.4 pro is available in the Responses API only to enable support for multi-turn model interactions before responding to API requests, and other advanced API features in the future. Since GPT-5.4 pro is designed to tackle tough problems, some requests may take several minutes to finish. To avoid timeout, please set a longer timeout duration. It is recommended to use this under good network conditions.
Please note: this model is extremely expensive and very slow. If a request fails due to network issues, you may still be charged heavily; we cannot refund charges incurred by requests to this model. GPT-5.4 pro is available in the Responses API only to enable support for multi-turn model interactions before responding to API requests, and other advanced API features in the future. Since GPT-5.4 pro is designed to tackle tough problems, some requests may take several minutes to finish. To avoid timeout, please set a longer timeout duration. It is recommended to use this under good network conditions.
GPT 5.4 Pro has a 1,050,000 token context window.
On AIHubMix, GPT 5.4 Pro costs $30 per million input tokens and $180 per million output tokens.
GPT 5.4 Pro accepts text and image input.
GPT 5.4 Pro supports thinking, web search, tool calling, function calling and structured outputs. Per-protocol parameter support is listed in the capability table on this page.
GPT 5.4 Pro 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-5.4-pro — no other code changes needed.
GPT 5.4 Pro is developed by OpenAI. AIHubMix aggregates it alongside models from other providers behind one API and one bill.
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Use GPT 5.4 Pro via the AIHubMix unified API — one interface for every major LLM.