Compare · ModelsLive · 2 picked · head to head
Grok 4 vs GPT-5.1
Side by side · benchmarks, pricing, and signals you can act on.
Winner summary
GPT-5.1 wins on 12/17 benchmarks
GPT-5.1 wins 12 of 17 shared benchmarks. Leads in agentic · reasoning · knowledge.
Category leads
agentic·GPT-5.1reasoning·GPT-5.1knowledge·GPT-5.1math·GPT-5.1language·Grok 4coding·GPT-5.1
Hype vs Reality
Attention vs performance
Grok 4
#71 by perf·no signal
GPT-5.1
#95 by perf·no signal
Best value
GPT-5.1
1.4x better value than Grok 4
Grok 4
6.1 pts/$
$9.00/M
GPT-5.1
8.8 pts/$
$5.63/M
Vendor risk
Who is behind the model
xAI
$250.0B·Tier 1
OpenAI
$840.0B·Tier 1
Head to head
17 benchmarks · 2 models
Grok 4GPT-5.1
APEX-Agents
GPT-5.1 leads by +2.3
APEX-Agents · evaluates AI agents on complex, multi-step tasks requiring planning, tool use, and autonomous decision-making in realistic environments.
Grok 4
15.2
GPT-5.1
17.5
ARC-AGI
GPT-5.1 leads by +6.1
ARC-AGI · the original Abstraction and Reasoning Corpus, testing whether AI can solve novel visual pattern recognition tasks without memorization.
Grok 4
66.7
GPT-5.1
72.8
ARC-AGI-2
GPT-5.1 leads by +1.7
ARC-AGI-2 · the second iteration of the Abstraction and Reasoning Corpus, testing novel pattern recognition and abstract reasoning without prior training data.
Grok 4
16.0
GPT-5.1
17.6
Chess Puzzles
GPT-5.1 leads by +4.0
Chess Puzzles · tests strategic and tactical reasoning by having models solve chess puzzle positions, evaluating lookahead and pattern recognition abilities.
Grok 4
28.0
GPT-5.1
32.0
FrontierMath-2025-02-28-Private
GPT-5.1 leads by +11.4
FrontierMath (Feb 2025) · original research-level math problems created by mathematicians, testing capabilities at the boundary of current AI mathematical reasoning.
Grok 4
19.7
GPT-5.1
31.0
FrontierMath-Tier-4-2025-07-01-Private
GPT-5.1 leads by +10.4
FrontierMath Tier 4 (Jul 2025) · the most challenging tier of frontier mathematics, containing problems that push the absolute limits of AI mathematical reasoning.
Grok 4
2.1
GPT-5.1
12.5
GPQA diamond
GPT-5.1 leads by +0.8
Graduate-Level Google-Proof QA (Diamond set) · expert-crafted questions in physics, biology, and chemistry that are difficult even for domain PhDs.
Grok 4
82.7
GPT-5.1
83.5
HELM · GPQA
Grok 4 leads by +28.4
Grok 4
72.6
GPT-5.1
44.2
HELM · IFEval
Grok 4 leads by +1.4
Grok 4
94.9
GPT-5.1
93.5
HELM · MMLU-Pro
Grok 4 leads by +27.2
Grok 4
85.1
GPT-5.1
57.9
HELM · Omni-MATH
Grok 4 leads by +13.9
Grok 4
60.3
GPT-5.1
46.4
HELM · WildBench
GPT-5.1 leads by +6.6
Grok 4
79.7
GPT-5.1
86.3
OTIS Mock AIME 2024-2025
GPT-5.1 leads by +4.6
OTIS Mock AIME 2024–2025 · simulated American Invitational Mathematics Examination problems testing advanced problem-solving skills.
Grok 4
84.0
GPT-5.1
88.6
SimpleBench
Grok 4 leads by +8.8
SimpleBench · tests fundamental reasoning capabilities with straightforward problems designed to expose gaps in basic logical and spatial thinking.
Grok 4
52.6
GPT-5.1
43.8
SimpleQA Verified
GPT-5.1 leads by +1.0
SimpleQA Verified · short factual questions with verified answers, measuring factual accuracy and the tendency to hallucinate or provide incorrect information.
Grok 4
47.9
GPT-5.1
48.9
Terminal Bench
GPT-5.1 leads by +20.4
Terminal Bench · tests the ability to accomplish real-world tasks using terminal commands, evaluating shell scripting and CLI tool proficiency.
Grok 4
27.2
GPT-5.1
47.6
WeirdML
GPT-5.1 leads by +15.0
WeirdML · tests models on unusual and adversarial machine learning tasks that require creative problem-solving beyond standard patterns.
Grok 4
45.7
GPT-5.1
60.8
Full benchmark table
| Benchmark | Grok 4 | GPT-5.1 |
|---|---|---|
APEX-Agents APEX-Agents · evaluates AI agents on complex, multi-step tasks requiring planning, tool use, and autonomous decision-making in realistic environments. | 15.2 | 17.5 |
ARC-AGI ARC-AGI · the original Abstraction and Reasoning Corpus, testing whether AI can solve novel visual pattern recognition tasks without memorization. | 66.7 | 72.8 |
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. | 16.0 | 17.6 |
Chess Puzzles Chess Puzzles · tests strategic and tactical reasoning by having models solve chess puzzle positions, evaluating lookahead and pattern recognition abilities. | 28.0 | 32.0 |
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. | 19.7 | 31.0 |
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. | 2.1 | 12.5 |
GPQA diamond Graduate-Level Google-Proof QA (Diamond set) · expert-crafted questions in physics, biology, and chemistry that are difficult even for domain PhDs. | 82.7 | 83.5 |
HELM · GPQA | 72.6 | 44.2 |
HELM · IFEval | 94.9 | 93.5 |
HELM · MMLU-Pro | 85.1 | 57.9 |
HELM · Omni-MATH | 60.3 | 46.4 |
HELM · WildBench | 79.7 | 86.3 |
OTIS Mock AIME 2024-2025 OTIS Mock AIME 2024–2025 · simulated American Invitational Mathematics Examination problems testing advanced problem-solving skills. | 84.0 | 88.6 |
SimpleBench SimpleBench · tests fundamental reasoning capabilities with straightforward problems designed to expose gaps in basic logical and spatial thinking. | 52.6 | 43.8 |
SimpleQA Verified SimpleQA Verified · short factual questions with verified answers, measuring factual accuracy and the tendency to hallucinate or provide incorrect information. | 47.9 | 48.9 |
Terminal Bench Terminal Bench · tests the ability to accomplish real-world tasks using terminal commands, evaluating shell scripting and CLI tool proficiency. | 27.2 | 47.6 |
WeirdML WeirdML · tests models on unusual and adversarial machine learning tasks that require creative problem-solving beyond standard patterns. | 45.7 | 60.8 |
Pricing · per 1M tokens · projected $/mo at 10M tokens