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Claude Opus 5 vs Grok 4.6

Claude Opus 5 leads the LLM Stats Score 56.2 to 47.0. Grok 4.6 is 3.3x cheaper per token.

Anthropic · xAI · Updated for 2026

Which is better?

Claude Opus 5 leads the overall LLM Stats Score 56.2 to 47.0, ranking #2 overall.

The models split the 2 individual benchmarks reported for both models evenly.

On price, Grok 4.6 is roughly 3.3x cheaper per token on a blended 3:1 input/output basis, which adds up quickly at production volume.

Claude Opus 5 also accepts a larger context window (1,000,000 input tokens), making it the stronger choice for long documents and large codebases.

Based on current LLM Stats indexes, shared benchmarks, pricing, and model metadata for 2026.

Choose Claude Opus 5

  • overall performance matters — it scores 56.2 and ranks #2 on LLM Stats
  • you process long inputs — it offers a 1,000,000 token context window

Choose Grok 4.6

  • cost matters — it's about 3.3x cheaper per token
  • you want the most recent training data — it shipped Aug 2026

At a glance

The differences that matter most.

Claude Opus 5
Anthropic
Grok 4.6
xAI
Core performance indexes
LLM Stats Score
56.2
#2
47.0
#19
Reasoning
55.0
#3
50.1
#14
Coding
42.8
#9
39.9
#12
Agents
41.3
#3
38.8
#10
Cost, coverage & limits
Benchmark wins
1 of 2
1 of 2
Input price
$5.00 / M
$2.00 / M
Output price
$25.00 / M
$6.00 / M
Context window
1,000,000
500,000

Individual benchmarks

12 reported for Claude Opus 5 · 10 for Grok 4.6

2 shared

Claude Opus 5 outperforms in 1 benchmarks (DeepSWE 1.1), while Grok 4.6 is better at 1 benchmark (FrontierCode).

Both models are evenly matched across the benchmarks.

Fri Aug 28 2026 • llm-stats.com

Human preference

Blind head-to-head votes and playground preference scores

Pricing Analysis

Price comparison per million tokens

Grok 4.6 costs less

For input processing, Claude Opus 5 ($5.00/1M tokens) is 2.5x more expensive than Grok 4.6 ($2.00/1M tokens).

For output processing, Claude Opus 5 ($25.00/1M tokens) is 4.2x more expensive than Grok 4.6 ($6.00/1M tokens).

In conclusion, Claude Opus 5 is more expensive than Grok 4.6.*

* Using a 3:1 ratio of input to output tokens

Lowest available price from all providers
Fri Aug 28 2026 • llm-stats.com
Anthropic
Claude Opus 5
Input tokens$5.00
Output tokens$25.00
Best providerAnthropic
xAI
Grok 4.6
Input tokens$2.00
Output tokens$6.00
Best providerxAI
Notice missing or incorrect data?Start an Issue→

Context Window

Maximum input and output token capacity

Claude Opus 5 accepts 1,000,000 input tokens compared to Grok 4.6's 500,000 tokens. Only Claude Opus 5 specifies output context (128,000 tokens).

Anthropic
Claude Opus 5
Input1,000,000 tokens
Output128,000 tokens
xAI
Grok 4.6
Input500,000 tokens
Output- tokens
Fri Aug 28 2026 • llm-stats.com

Input capabilities

Documented input modalities across available providers

Both Claude Opus 5 and Grok 4.6 support multimodal inputs.

They are both capable of processing various types of data, offering versatility in application.

Claude Opus 5

Text
Images
Audio
Video

Grok 4.6

Text
Images
Audio
Video

License

Usage and distribution terms

Both models are licensed under proprietary licenses.

Both models have usage restrictions defined by their respective organizations.

Claude Opus 5

Proprietary

Closed source

Grok 4.6

Proprietary

Closed source

Release Timeline

When each model was launched

Claude Opus 5 was released on 2026-07-24, while Grok 4.6 was released on 2026-08-12.

Grok 4.6 is 1 month newer than Claude Opus 5.

Claude Opus 5

Jul 24, 2026

1 months ago

Grok 4.6

Aug 12, 2026

2 weeks ago

2w newer

Knowledge Cutoff

When training data ends

Grok 4.6 has a documented knowledge cutoff of 2026-02-01, while Claude Opus 5's cutoff date is not specified.

We can confirm Grok 4.6's training data extends to 2026-02-01, but cannot make a direct comparison without Claude Opus 5's cutoff date.

Claude Opus 5

—

Grok 4.6

Feb 2026

Provider Availability

Claude Opus 5 is available from Anthropic. Grok 4.6 is available from xAI.

Claude Opus 5

anthropic logo
Anthropic
Input Price:Input: $5.00/1MOutput Price:Output: $25.00/1M

Grok 4.6

xai logo
xAI
Input Price:Input: $2.00/1MOutput Price:Output: $6.00/1M
* Prices shown are per million tokens

Outputs Comparison

Notice missing or incorrect data?Start an Issue discussion→

Judge for yourself.

Run your own prompts against Claude Opus 5 and Grok 4.6 side-by-side, then vote on the output you prefer.

Claude Opus 5
✓ Preferred
Grok 4.6
Open in Playground

FAQ

Common questions about Claude Opus 5 vs Grok 4.6.

Which is better, Claude Opus 5 or Grok 4.6?

Claude Opus 5 leads the LLM Stats Score 56.2 to 47.0. Claude Opus 5 is made by Anthropic and Grok 4.6 is made by xAI. The best choice depends on your use case — compare their capability indexes, individual benchmarks, pricing, and limits above.

How does Claude Opus 5 compare to Grok 4.6 in benchmarks?

Claude Opus 5 scores BrowseComp: 90.8%, BioMysteryBench: 90.1%, OSWorld 2.0: 70.6%, DeepSWE 1.1: 68.8%, Humanity's Last Exam: 64.7%. Grok 4.6 scores CursorBench v3.2: 69.9%, DeepSWE 1.1: 65.9%, FrontierCode: 61.3%, AA-Index: 61.0%, GDPval-AA: 58.4%.

Is Claude Opus 5 cheaper than Grok 4.6?

Grok 4.6 is 2.5x cheaper for input tokens. Claude Opus 5 costs $5.00/M input and $25.00/M output via anthropic. Grok 4.6 costs $2.00/M input and $6.00/M output via xai.

What are the context window sizes for Claude Opus 5 and Grok 4.6?

Claude Opus 5 supports 1.0M tokens and Grok 4.6 supports 500K tokens. A larger context window lets you process longer documents, conversations, or codebases in a single request.

What are the main differences between Claude Opus 5 and Grok 4.6?

Key differences include LLM Stats Score (56.2 vs 47.0), context window (1.0M vs 500K), input pricing ($5.00 vs $2.00/M). See the full comparison above for benchmark-by-benchmark results.

Who makes Claude Opus 5 and Grok 4.6?

Claude Opus 5 is developed by Anthropic and Grok 4.6 is developed by xAI.

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