Compare · ModelsLive · 2 picked · head to head
Claude Opus 4 vs Grok 3
Side by side · benchmarks, pricing, and signals you can act on.
Winner summary
Claude Opus 4 wins on 10/11 benchmarks
Claude Opus 4 wins 10 of 11 shared benchmarks. Leads in coding · reasoning · knowledge.
Category leads
coding·Claude Opus 4reasoning·Claude Opus 4knowledge·Claude Opus 4math·Claude Opus 4
Hype vs Reality
Attention vs performance
Claude Opus 4
#162 by perf·no signal
Grok 3
#141 by perf·#9 by attention
Vendor risk
Who is behind the model
Anthropic
$380.0B·Tier 1
xAI
$250.0B·Tier 1
Head to head
11 benchmarks · 2 models
Claude Opus 4Grok 3
Aider polyglot
Claude Opus 4 leads by +18.7
Aider Polyglot · measures how well AI models can edit code across multiple programming languages using the Aider coding assistant framework.
Claude Opus 4
72.0
Grok 3
53.3
ARC-AGI
Claude Opus 4 leads by +30.2
ARC-AGI · the original Abstraction and Reasoning Corpus, testing whether AI can solve novel visual pattern recognition tasks without memorization.
Claude Opus 4
35.7
Grok 3
5.5
ARC-AGI-2
Claude Opus 4 leads by +8.6
ARC-AGI-2 · the second iteration of the Abstraction and Reasoning Corpus, testing novel pattern recognition and abstract reasoning without prior training data.
Claude Opus 4
8.6
Grok 3
0.0
Fiction.LiveBench
Claude Opus 4 leads by +2.8
Fiction.LiveBench · a continuously updated benchmark using recently published fiction to test reading comprehension and reasoning, preventing data contamination.
Claude Opus 4
61.1
Grok 3
58.3
FrontierMath-2025-02-28-Private
Claude Opus 4 leads by +0.7
FrontierMath (Feb 2025) · original research-level math problems created by mathematicians, testing capabilities at the boundary of current AI mathematical reasoning.
Claude Opus 4
4.5
Grok 3
3.8
FrontierMath-Tier-4-2025-07-01-Private
Claude Opus 4 leads by +4.2
FrontierMath Tier 4 (Jul 2025) · the most challenging tier of frontier mathematics, containing problems that push the absolute limits of AI mathematical reasoning.
Claude Opus 4
4.2
Grok 3
0.0
GPQA diamond
Claude Opus 4 leads by +0.7
Graduate-Level Google-Proof QA (Diamond set) · expert-crafted questions in physics, biology, and chemistry that are difficult even for domain PhDs.
Claude Opus 4
68.3
Grok 3
67.7
MATH level 5
Grok 3 leads by +3.7
MATH Level 5 · the hardest tier of the MATH benchmark, featuring competition-level problems from AMC, AIME, and Olympiad-style mathematics.
Claude Opus 4
85.0
Grok 3
88.8
OTIS Mock AIME 2024-2025
Claude Opus 4 leads by +8.9
OTIS Mock AIME 2024-2025 · simulated American Invitational Mathematics Examination problems testing advanced problem-solving skills.
Claude Opus 4
64.4
Grok 3
55.5
SimpleBench
Claude Opus 4 leads by +27.2
SimpleBench · tests fundamental reasoning capabilities with straightforward problems designed to expose gaps in basic logical and spatial thinking.
Claude Opus 4
50.6
Grok 3
23.3
WeirdML
Claude Opus 4 leads by +6.2
WeirdML · tests models on unusual and adversarial machine learning tasks that require creative problem-solving beyond standard patterns.
Claude Opus 4
43.4
Grok 3
37.2
Full benchmark table
| Benchmark | Claude Opus 4 | Grok 3 |
|---|---|---|
Aider polyglot Aider Polyglot · measures how well AI models can edit code across multiple programming languages using the Aider coding assistant framework. | 72.0 | 53.3 |
ARC-AGI ARC-AGI · the original Abstraction and Reasoning Corpus, testing whether AI can solve novel visual pattern recognition tasks without memorization. | 35.7 | 5.5 |
ARC-AGI-2 ARC-AGI-2 · the second iteration of the Abstraction and Reasoning Corpus, testing novel pattern recognition and abstract reasoning without prior training data. | 8.6 | 0.0 |
Fiction.LiveBench Fiction.LiveBench · a continuously updated benchmark using recently published fiction to test reading comprehension and reasoning, preventing data contamination. | 61.1 | 58.3 |
FrontierMath-2025-02-28-Private FrontierMath (Feb 2025) · original research-level math problems created by mathematicians, testing capabilities at the boundary of current AI mathematical reasoning. | 4.5 | 3.8 |
FrontierMath-Tier-4-2025-07-01-Private FrontierMath Tier 4 (Jul 2025) · the most challenging tier of frontier mathematics, containing problems that push the absolute limits of AI mathematical reasoning. | 4.2 | 0.0 |
GPQA diamond Graduate-Level Google-Proof QA (Diamond set) · expert-crafted questions in physics, biology, and chemistry that are difficult even for domain PhDs. | 68.3 | 67.7 |
MATH level 5 MATH Level 5 · the hardest tier of the MATH benchmark, featuring competition-level problems from AMC, AIME, and Olympiad-style mathematics. | 85.0 | 88.8 |
OTIS Mock AIME 2024-2025 OTIS Mock AIME 2024-2025 · simulated American Invitational Mathematics Examination problems testing advanced problem-solving skills. | 64.4 | 55.5 |
SimpleBench SimpleBench · tests fundamental reasoning capabilities with straightforward problems designed to expose gaps in basic logical and spatial thinking. | 50.6 | 23.3 |
WeirdML WeirdML · tests models on unusual and adversarial machine learning tasks that require creative problem-solving beyond standard patterns. | 43.4 | 37.2 |
Pricing · per 1M tokens · projected $/mo at 10M tokens
| Model | Input | Output | Context | Projected $/mo |
|---|---|---|---|---|
| $15.00 | $75.00 | 200K tokens (~100 books) | $300.00 | |
| — | — | — | — |
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