Compare Grok 4.5 from Grok and Kimi K3.1 Pro Highspeed from Moonshot AI on key metrics including benchmarks, price, context length, and other model features. Access both models and hundreds of others through the AIHubMix API.
Grok 4.5
Kimi K3.1 Pro HighspeedGrok 4.5 was trained on datasets spanning knowledge in coding, science, engineering, and math. With both intelligent and efficient reasoning, Grok 4.5 excels at real engineering tasks and exceeds comparable leading models at these tasks.
Kimi K3.1 Pro Highspeed is an accelerated serving option for Kimi K3.1 Pro, focused on responsive code generation for interactive coding, rapid prototyping, and latency-sensitive applications.
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.
Daily traffic served through AIHubMix — how demand for each model is trending.
Measured on real AIHubMix traffic, hourly buckets. Gaps mean no traffic in that hour.
Estimate your monthly bill for the same workload on each model.
Monthly = daily × 30. Discounted rates applied where a promotion is active.
Grok 4.5: $6/M output tokens; Kimi K3.1 Pro Highspeed: $21/M. Use the cost calculator above to estimate your own workload.
Kimi K3.1 Pro Highspeed: 2.1s time to first token measured on AIHubMix; see the live performance charts above for how each model behaves across the day.
Kimi K3.1 Pro Highspeed at 110.4 tok/s and Grok 4.5 at 33.9 tok/s, measured as output throughput on AIHubMix — a separate metric from time to first token.
Grok 4.5 accepts text and image input and supports thinking, tool calling, function calling, structured outputs and long context; Kimi K3.1 Pro Highspeed accepts image and text input.
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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