Output tokens cost $0.60 per million on GPT 4o Mini and $6.00 per million on Grok 4.5. Input tokens cost $0.15 per million on GPT 4o Mini and $2.00 per million on Grok 4.5. Cached input tokens are billed at $0.08 per million on GPT 4o Mini and $0.50 per million on Grok 4.5. Context lengths are 128,000 tokens on GPT 4o Mini and 500,000 tokens on Grok 4.5. Time to first token (TTFT) measured on AIHubMix is 0.6s on GPT 4o Mini and 2.0s on Grok 4.5. Measured output throughput is 51.4 tok/s on GPT 4o Mini and 27.0 tok/s on Grok 4.5. On the LMArena coding leaderboard GPT 4o Mini scores 1349 and Grok 4.5 scores 1523.
GPT 4o Mini
Grok 4.5The lightweight version of GPT-4o, which is affordable and fast, suitable for handling simple tasks; our site supports the official automatic caching for this model, and charges for cache hits will be automatically halved.
Grok 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.
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.
LMArena ratings by capability (Bradley-Terry, commonly called Elo). Higher is better.
Source: LMArena (arena.ai) leaderboard, imported by AIHubMix. Models without published ratings are omitted per chart.
Estimate your monthly bill for the same workload on each model.
Monthly = daily × 30. Discounted rates applied where a promotion is active.
GPT 4o Mini: $0.60/M output tokens; Grok 4.5: $6.00/M. Use the cost calculator above to estimate your own workload.
Grok 4.5: 1523; GPT 4o Mini: 1349 (LMArena coding leaderboard).
GPT 4o Mini: 0.6s time to first token measured on AIHubMix; see the live performance charts above for how each model behaves across the day.
GPT 4o Mini accepts 128,000 and Grok 4.5 accepts 500,000 input tokens. Maximum output per request is 16,384 tokens on GPT 4o Mini and 500,000 tokens on Grok 4.5.
GPT 4o Mini at 51.4 tok/s and Grok 4.5 at 27.0 tok/s, measured as output throughput on AIHubMix — a separate metric from time to first token.
GPT 4o Mini accepts text and image input; Grok 4.5 accepts text and image input and supports thinking, tool calling, function calling, structured outputs and long context.
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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