Output tokens cost $55.00 per million on Claude Fable 5 and $6.00 per million on Grok 4.5. Input tokens cost $11.00 per million on Claude Fable 5 and $2.00 per million on Grok 4.5. Cached input tokens are billed at $1.10 per million on Claude Fable 5 and $0.50 per million on Grok 4.5. Context lengths are 1,000,000 tokens on Claude Fable 5 and 500,000 tokens on Grok 4.5. Time to first token (TTFT) measured on AIHubMix is 2.4s on Claude Fable 5 and 1.8s on Grok 4.5. Measured output throughput is 51.4 tok/s on Claude Fable 5 and 26.8 tok/s on Grok 4.5. On the LMArena coding leaderboard Claude Fable 5 scores 1551 and Grok 4.5 scores 1523.
Claude Fable 5
Grok 4.5Anthropic's most capable widely released model, for the most demanding reasoning and long-horizon agentic work（This model is extremely expensive and is not recommended for casual use.）
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; Claude Fable 5: $55.00/M. Use the cost calculator above to estimate your own workload.
Claude Fable 5: 1551; Grok 4.5: 1523 (LMArena coding leaderboard).
Grok 4.5: 1.8s time to first token measured on AIHubMix; see the live performance charts above for how each model behaves across the day.
Claude Fable 5 accepts 1,000,000 and Grok 4.5 accepts 500,000 input tokens. Maximum output per request is 128,000 tokens on Claude Fable 5 and 500,000 tokens on Grok 4.5.
Claude Fable 5 at 51.4 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.
Claude Fable 5 accepts text and image input and supports thinking, tool calling, function calling and structured outputs; 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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