Compare Claude Opus 4.8 Thinking from Anthropic and Grok 4.5 from Grok on key metrics including benchmarks, price, context length, and other model features. Access both models and hundreds of others through the AIHubMix API.
Claude Opus 4.8 Thinking
Grok 4.5The claude-opus-4-8-think model has adaptive thinking mode pre-enabled; the default thinking intensity is "medium", and it can be invoked directly via the OpenAI unified API. The claude-opus-4-8 model does not display thinking content by default; you need to set the extra parameter "display": "summarized" to enable it.
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/M output tokens; Claude Opus 4.8 Thinking: $25/M. Use the cost calculator above to estimate your own workload.
Claude Opus 4.8 Thinking: 1535; Grok 4.5: 1523 (LMArena coding leaderboard).
Claude Opus 4.8 Thinking: 2.8s time to first token measured on AIHubMix; see the live performance charts above for how each model behaves across the day.
Claude Opus 4.8 Thinking accepts 1,000,000 and Grok 4.5 accepts 500,000 input tokens. Maximum output per request is 128,000 tokens on Claude Opus 4.8 Thinking and 500,000 tokens on Grok 4.5.
Claude Opus 4.8 Thinking at 52.9 tok/s and Grok 4.5 at 40.6 tok/s, measured as output throughput on AIHubMix — a separate metric from time to first token.
Claude Opus 4.8 Thinking accepts text, image and PDF 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.
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