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claude-opus-4-6-think vs grok-4.5

Output tokens cost $25.00 per million on claude-opus-4-6-think and $6.00 per million on grok-4.5. Input tokens cost $5.00 per million on claude-opus-4-6-think and $2.00 per million on grok-4.5. Cached input tokens are billed at $0.50 per million on claude-opus-4-6-think and $0.50 per million on grok-4.5. Context lengths are 200,000 tokens on claude-opus-4-6-think and 500,000 tokens on grok-4.5. Time to first token (TTFT) measured on AIHubMix is 1.7s on claude-opus-4-6-think and 2.2s on grok-4.5. Measured output throughput is 42.2 tok/s on claude-opus-4-6-think and 34.7 tok/s on grok-4.5. On the LMArena coding leaderboard claude-opus-4-6-think scores 1547 and grok-4.5 scores 1520.

Anthropicclaude-opus-4-6-thinkGrokgrok-4.5
+ Add model · 2/4
Anthropic logo
claude-opus-4-6-think
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$5.00 /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-4-6-think
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
1.7 s
2.2 s
Throughput
42.2 tok/s
34.7 tok/s
Modalities
imagetext
textimage
Supported Parameters
thinkingtoolsfunction callingstructured outputs
thinkingtoolsfunction callingstructured outputslong context
API Formats

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
14691497
Coding
15201547
Math
14791506
Hard prompts
14931526
Instruction following
14651500
Multi-turn
14731512
Creative writing
14451479
Longer query
14851518
Chinese
15181549
English
14731507
Vision
claude-opus-4-6-thinkgrok-4.5
126013001340
Overall
12851293
OCR
12961310
Diagram
13281331
Homework
13141337
WebDev Arena
claude-opus-4-6-thinkgrok-4.5
1500154015801620
Overall
15371554
React
15291555
HTML
15501578
Gaming
15661585
Simulations
15451603
Data analytics
15151520

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-think
$675 /mo

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

FAQ

Which is cheaper: claude-opus-4-6-think, grok-4.5?

grok-4.5: $6.00/M output tokens; claude-opus-4-6-think: $25.00/M. Use the cost calculator above to estimate your own workload.

How do their coding arena scores compare?

claude-opus-4-6-think: 1547; grok-4.5: 1520 (LMArena coding leaderboard).

Which responds faster?

claude-opus-4-6-think: 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-think 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-think and 500,000 tokens on grok-4.5.

Which one generates tokens faster?

claude-opus-4-6-think at 42.2 tok/s and grok-4.5 at 34.7 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-think 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-think 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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