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Claude Opus 4.5 vs Grok 4.5

Output tokens cost $25.00 per million on Claude Opus 4.5 and $6.00 per million on Grok 4.5. Input tokens cost $5.00 per million on Claude Opus 4.5 and $2.00 per million on Grok 4.5. Cached input tokens are billed at $0.50 per million on Claude Opus 4.5 and $0.50 per million on Grok 4.5. Context lengths are 200,000 tokens on Claude Opus 4.5 and 500,000 tokens on Grok 4.5. Time to first token (TTFT) measured on AIHubMix is 1.5s on Claude Opus 4.5 and 1.9s on Grok 4.5. Measured output throughput is 43.9 tok/s on Claude Opus 4.5 and 26.8 tok/s on Grok 4.5. On the LMArena coding leaderboard Claude Opus 4.5 scores 1523 and Grok 4.5 scores 1523.

AnthropicClaude Opus 4.5GrokGrok 4.5
+ Add model · 2/4
Anthropic logo
Claude Opus 4.5
Anthropic · text, image → text

Claude Opus 4.5 is Anthropic’s latest frontier reasoning model, optimized for complex engineering, agentic workflows, and long-horizon computer use. It features strong multimodal capabilities, improved resistance to prompt injection, and a new Verbosity parameter to control token efficiency. With advanced tool use, extended context, and multi-agent support, Opus 4.5 excels in autonomous research, debugging, planning, and spreadsheet/browser operations. ⚠️ The minimum cache token for claude-opus-4-5 has been increased from 1,024 to 4,096 tokens.

Input$5.00 /M
Output$25.00 /M
Details
Grok logo
Grok 4.5
Grok · text, image → text

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.

Input$2.00 /M
Output$6.00 /M
Details

Pricing & Specifications

Prices are per million tokens. Time to First Token and throughput are rolling averages measured on AIHubMix.

Claude Opus 4.5
Grok 4.5
Input /M
$5.00
$2.00
Output /M
$25.00
$6.00
Cache read /M
$0.50
$0.50
Context length
200,000
500,000
Max output
32,000
500,000
Time to First Token
1.5 s
1.9 s
Throughput
43.9 tok/s
26.8 tok/s
Modalities
textimage
textimage
Supported Parameters
thinkingtoolsfunction callingstructured outputs
thinkingtoolsfunction callingstructured outputslong context
API Formats
Released
-
July 2026

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.

claude-opus-4-5grok-4.5

Tokens / day

-

Requests / day

-

Performance Past 3 Days

Measured on real AIHubMix traffic, hourly buckets. Gaps mean no traffic in that hour.

claude-opus-4-5grok-4.5

Throughput (tok/s)

-

TTFT (s)

-

Uptime (%)

-

LMArena Benchmarks

LMArena ratings by capability (Bradley-Terry, commonly called Elo). Higher is better.

Text
claude-opus-4-5grok-4.5
1420146015001540
Overall
14691470
Coding
15231523
Math
14661478
Hard prompts
14951498
Instruction following
14661475
Multi-turn
14771484
Creative writing
14491461
Longer query
14851493
Chinese
15011511
English
14751479
WebDev Arena
claude-opus-4-5grok-4.5
1440150015601620
Overall
14661556
React
14591559
HTML
14741577
Gaming
15861586
Simulations
15981598
Data analytics
15221522

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.

Grok 4.5
$210 /mo
Claude Opus 4.5
$675 /mo

Monthly = daily × 30. Discounted rates applied where a promotion is active.

FAQ

Which is cheaper: Claude Opus 4.5, Grok 4.5?

Grok 4.5: $6.00/M output tokens; Claude Opus 4.5: $25.00/M. Use the cost calculator above to estimate your own workload.

How do their coding arena scores compare?

Claude Opus 4.5: 1523; Grok 4.5: 1523 (LMArena coding leaderboard).

Which responds faster?

Claude Opus 4.5: 1.5s 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 4.5 accepts 200,000 and Grok 4.5 accepts 500,000 input tokens. Maximum output per request is 32,000 tokens on Claude Opus 4.5 and 500,000 tokens on Grok 4.5.

Which one generates tokens faster?

Claude Opus 4.5 at 43.9 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.

What inputs and capabilities does each model support?

Claude Opus 4.5 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.

Can I call Claude Opus 4.5 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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