GPT-5.1 vs Grok 4.20 (Reasoning)
Change modelsGPT-5.1OpenAI
IndexAll categories, out of 100.
55.3 ±3.7
55.5 ±5.5 best
GapIndex points below the top.
−0.2 · no clear gap
Top
CoverageIndex weight that has results.
95% best
90%
SpeedOutput tokens per second.
50/s
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EloLMArena rating and rank.
1422
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ReleasedMonth of release.
2025-11
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Input / 1MUS dollars per 1M input tokens.
$1.25
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Output / 1MUS dollars per 1M output tokens.
$10.00
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Batch output / 1MBatch price per 1M output tokens.
$5.00
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1K chats2K tokens in, 500 out, each.
$7.50
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1K documents20K tokens in, 1K out, each.
$35.00
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1K agent tasks200K tokens in, 20K out, each.
$450.00
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ContextMaximum tokens in one request.
400K
—
AgenticMulti-step tasks with tools.
52.4 best
48.9
CodingCode writing and repair.
53.5 best
51.6
ReasoningLogic problems and puzzles.
56.4
68.6 best
MultimodalTasks with images and text.
58.4
63.8 best
KnowledgeFacts and expert knowledge.
57.2 best
55.8
MultilingualTasks in many languages.
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InstructionTasks with strict prompt rules.
57.1
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MathMath problems.
57.5
57.7 best
Benchmarks
18 sharedOnly GPT-5.1: 26Only Grok 4.20 (Reasoning): 10
GPT-5.1
Grok 4.20 (Reasoning)