Claude Opus 4.6 is Anthropic’s latest state-of-the-art reasoning model. It features an adaptive “thinking” mode that dynamically decides when to think and how much to think. At the default effort level (high), Claude will almost always engage in thinking. At lower effort levels, it may skip thinking for simple problems. ⚠️ The minimum cache token for claude-opus-4-6 has been increased from 1,024 to 4,096 tokens.
claude-opus-4-6 vs grok-4.5
Output tokens cost $25.00 per million on claude-opus-4-6 and $6.00 per million on grok-4.5. Input tokens cost $5.00 per million on claude-opus-4-6 and $2.00 per million on grok-4.5. Cached input tokens are billed at $0.50 per million on claude-opus-4-6 and $0.50 per million on grok-4.5. Context lengths are 200,000 tokens on claude-opus-4-6 and 500,000 tokens on grok-4.5. Time to first token (TTFT) measured on AIHubMix is 2.0s on claude-opus-4-6 and 2.0s on grok-4.5. Measured output throughput is 43.5 tok/s on claude-opus-4-6 and 34.5 tok/s on grok-4.5. On the LMArena coding leaderboard claude-opus-4-6 scores 1547 and grok-4.5 scores 1520.
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.
Pricing & Specifications
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.
Activity Past 30 Days
Daily traffic served through AIHubMix — how demand for each model is trending.
Tokens / day
Requests / day
Performance Past 3 Days
Measured on real AIHubMix traffic, hourly buckets. Gaps mean no traffic in that hour.
Throughput (tok/s)
TTFT (s)
Uptime (%)
LMArena Benchmarks
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.
Cost calculator
Estimate your monthly bill for the same workload on each model.
Monthly = daily × 30. Discounted rates applied where a promotion is active.
FAQ
Which is cheaper: claude-opus-4-6, grok-4.5?
grok-4.5: $6.00/M output tokens; claude-opus-4-6: $25.00/M. Use the cost calculator above to estimate your own workload.
How do their coding arena scores compare?
claude-opus-4-6: 1547; grok-4.5: 1520 (LMArena coding leaderboard).
Which responds faster?
claude-opus-4-6: 2.0s time to first token measured on AIHubMix; see the live performance charts above for how each model behaves across the day.
How large is each context window?
claude-opus-4-6 accepts 200,000 and grok-4.5 accepts 500,000 input tokens. Maximum output per request is 32,000 tokens on claude-opus-4-6 and 500,000 tokens on grok-4.5.
Which one generates tokens faster?
claude-opus-4-6 at 43.5 tok/s and grok-4.5 at 34.5 tok/s, measured as output throughput on AIHubMix — a separate metric from time to first token.
What inputs and capabilities does each model support?
claude-opus-4-6 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.
Can I call claude-opus-4-6 and grok-4.5 with the same API key?
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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