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.
GPT 5.4 Low vs Kimi K3
Output tokens cost $15.00 per million on GPT 5.4 Low and $15.00 per million on Kimi K3. Input tokens cost $2.50 per million on GPT 5.4 Low and $3.00 per million on Kimi K3. Cached input tokens are billed at $0.25 per million on GPT 5.4 Low and $0.30 per million on Kimi K3. Context lengths are 400,000 tokens on GPT 5.4 Low and 1,048,576 tokens on Kimi K3.
Kimi K3 is Kimi’s flagship model for long-horizon coding and end-to-end knowledge work, with a 1M-token context window and industry-leading intelligence.
Pricing & Specifications
Prices are per million tokens. Time to First Token and throughput are rolling averages measured on AIHubMix.
Promotional prices show the discounted rate; see each model page for promotion windows.
Activity Past 30 Days
Daily traffic served through AIHubMix — how demand for each model is trending.
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Performance Past 3 Days
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Cost calculator
Estimate your monthly bill for the same workload on each model.
Monthly = daily × 30. Discounted rates applied where a promotion is active.
FAQ
Which is cheaper: GPT 5.4 Low, Kimi K3?
GPT 5.4 Low: $15.00/M output tokens; Kimi K3: $15.00/M. Use the cost calculator above to estimate your own workload.
How large is each context window?
GPT 5.4 Low accepts 400,000 and Kimi K3 accepts 1,048,576 input tokens. Maximum output per request is 128,000 tokens on GPT 5.4 Low and 1,048,576 tokens on Kimi K3.
What inputs and capabilities does each model support?
GPT 5.4 Low accepts text and image input and supports thinking, function calling, web search, structured outputs and tool calling; Kimi K3 accepts text, image and video input and supports thinking, function calling and structured outputs.
Can I call GPT 5.4 Low and Kimi K3 with the same API key?
Yes. AIHubMix serves every model on this page behind one OpenAI-compatible endpoint, so switching between them is a one-line change to the model field — no second account, key or SDK.
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