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Anthropic Opus 4.6 vs Grok 4.5

Compare Anthropic Opus 4.6 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.

AnthropicAnthropic Opus 4.6GrokGrok 4.5
+ Add model · 2/4
Anthropic logo
Anthropic Opus 4.6
Anthropic · text, image → text

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.

Input$5 /M
Output$25 /M
Cache read$0.5 /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 /M
Output$6 /M
Cache read$0.5 /M
Details

Pricing & Specifications

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

Anthropic Opus 4.6
Grok 4.5
Input /M
$5
$2
Output /M
$25
$6
Cache read /M
$0.5
$0.5
Context length
200,000
500,000
Max output
32,000
500,000
Time to First Token
3.1 s
3.5 s
Throughput
39.7 tok/s
26.5 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.

anthropic-opus-4-6grok-4.5

Tokens / day

-

Requests / day

-

Performance Past 3 Days

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

anthropic-opus-4-6grok-4.5

Throughput (tok/s)

-

TTFT (s)

-

Uptime (%)

-

LMArena Benchmarks

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

Text
anthropic-opus-4-6grok-4.5
14201460150015401580
Overall
14711499
Coding
15231548
Math
14791504
Hard prompts
14951528
Instruction following
14661501
Multi-turn
14761510
Creative writing
14511478
Longer query
14871519
Chinese
15121549
English
14761508
Vision
anthropic-opus-4-6grok-4.5
126013001340
Overall
12821297
OCR
12941313
Diagram
13191333
Homework
13141324
WebDev Arena
anthropic-opus-4-6grok-4.5
1500154015801620
Overall
15361556
React
15301559
HTML
15421571
Gaming
15891589
Simulations
15851585
Data analytics
15211521

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
Anthropic Opus 4.6
$675 /mo

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

FAQ

Which is cheaper: Anthropic Opus 4.6, Grok 4.5?

Grok 4.5: $6/M output tokens; Anthropic Opus 4.6: $25/M. Use the cost calculator above to estimate your own workload.

How do their coding arena scores compare?

Anthropic Opus 4.6: 1548; Grok 4.5: 1523 (LMArena coding leaderboard).

Which responds faster?

Anthropic Opus 4.6: 3.1s 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?

Anthropic Opus 4.6 accepts 200,000 and Grok 4.5 accepts 500,000 input tokens. Maximum output per request is 32,000 tokens on Anthropic Opus 4.6 and 500,000 tokens on Grok 4.5.

Which one generates tokens faster?

Anthropic Opus 4.6 at 39.7 tok/s and Grok 4.5 at 26.5 tok/s, measured as output throughput on AIHubMix — a separate metric from time to first token.

What inputs and capabilities does each model support?

Anthropic 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 Anthropic 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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