Output tokens cost $16.50 per million on Grok 4 and $6.00 per million on Grok 4.5. Input tokens cost $3.30 per million on Grok 4 and $2.00 per million on Grok 4.5. Cached input tokens are billed at $0.83 per million on Grok 4 and $0.50 per million on Grok 4.5. Context lengths are 256,000 tokens on Grok 4 and 500,000 tokens on Grok 4.5. Time to first token (TTFT) measured on AIHubMix is 2.7s on Grok 4 and 1.9s on Grok 4.5. Measured output throughput is 54.5 tok/s on Grok 4 and 26.8 tok/s on Grok 4.5. On the LMArena coding leaderboard Grok 4 scores 1436 and Grok 4.5 scores 1523.
Grok 4Grok 4.5Grok, their latest and greatest flagship model, offers unparalleled performance in natural language, math, and reasoning – the perfect jack of all trades. The current pointing model version is grok-4-0709.
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.
Grok 4.5: $6.00/M output tokens; Grok 4: $16.50/M. Use the cost calculator above to estimate your own workload.
Grok 4.5: 1523; Grok 4: 1436 (LMArena coding leaderboard).
Grok 4.5: 1.9s time to first token measured on AIHubMix; see the live performance charts above for how each model behaves across the day.
Grok 4 accepts 256,000 and Grok 4.5 accepts 500,000 input tokens. Maximum output per request is 64,000 tokens on Grok 4 and 500,000 tokens on Grok 4.5.
Grok 4 at 54.5 tok/s and Grok 4.5 at 26.8 tok/s, measured as output throughput on AIHubMix — a separate metric from time to first token.
Grok 4 accepts text and image input and supports function calling, structured outputs and thinking; 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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