by OpenAI
GPT-5.4 supports configuring reasoning strength only through the /responses endpoint. To make lower-overhead reasoning available directly in the /chat endpoint, the GPT-5.4-Low model is provided. This model is based on GPT-5.4 with reasoning_effort preset to low. This model is designed for use cases that are sensitive to response latency and cost. By adopting a lighter reasoning strategy, it delivers stable responses with lower latency and higher throughput. It is well suited for high-concurrency conversations, real-time interactions, basic Q&A, and scenarios where deep reasoning is not required.
| Input | $2.5 / 1M tokens |
| Output | $15 / 1M tokens |
| Cache read | $0.25 / 1M tokens |
| Context window | 400,000 tokens |
| Modalities | text, image |
| Features | thinking, function_calling, web, structured_outputs, tools |
Use gpt-5.4-low via the AIHubMix unified API — one interface for every major LLM.