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Claude Opus 4.6 Thinking vs Grok 4.5

Compare Claude Opus 4.6 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.

AnthropicClaude Opus 4.6 ThinkingGrokGrok 4.5
+ Add model · 2/4
Anthropic logo
Claude Opus 4.6 Thinking
Anthropic · image, text → text

Claude Opus 4.6 does not enable reasoning mode by default. To access its deep reasoning capabilities, users would typically need to call the native Claude API. To make this capability available through an OpenAI-compatible interface, we provide the claude-opus-4-6-think model, which has reasoning mode pre-enabled and a default 32k-token context window, allowing it to be called directly via the OpenAI unified API. Claude Opus 4.5 Think is a reasoning-focused variant of Claude Opus 4.6 designed for advanced tasks that require rigorous reasoning, complex decision-making, and long-chain analysis. Aside from its enhanced reasoning mechanism, all other capabilities remain consistent with the standard Claude Opus 4.6 model, making it well suited for complex engineering problem decomposition, multi-stage planning, and logic-intensive analysis.

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.

Claude Opus 4.6 Thinking
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
1.7 s
3.5 s
Throughput
50.8 tok/s
26.5 tok/s
Modalities
imagetext
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-4-6-thinkgrok-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-4-6-thinkgrok-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-4-6-thinkgrok-4.5
14201460150015401580
Overall
14711498
Coding
15231546
Math
14791506
Hard prompts
14951527
Instruction following
14661500
Multi-turn
14761511
Creative writing
14511479
Longer query
14871517
Chinese
15121546
English
14761506
Vision
claude-opus-4-6-thinkgrok-4.5
126013001340
Overall
12821293
OCR
12941310
Diagram
13191331
Homework
13131324
WebDev Arena
claude-opus-4-6-thinkgrok-4.5
1500154015801620
Overall
15371556
React
15291559
HTML
15481571
Gaming
15661589
Simulations
15431585
Data analytics
15161521

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 4.6 Thinking
$675 /mo

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

FAQ

Which is cheaper: Claude Opus 4.6 Thinking, Grok 4.5?

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

How do their coding arena scores compare?

Claude Opus 4.6 Thinking: 1546; Grok 4.5: 1523 (LMArena coding leaderboard).

Which responds faster?

Claude Opus 4.6 Thinking: 1.7s 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 Thinking 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 Thinking and 500,000 tokens on Grok 4.5.

Which one generates tokens faster?

Claude Opus 4.6 Thinking at 50.8 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?

Claude Opus 4.6 Thinking accepts image and text 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 Thinking 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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