GPT-5.1-Codex vs GPT-5.1-Codex-Max
Change modelsGPT-5.1-CodexOpenAI
GPT-5.1-Codex-MaxOpenAI
IndexAll categories, out of 100.
52.9 ±5.7
53.8 ±6.2 best
GapIndex points below the top.
−0.9 · no clear gap
Top
CoverageIndex weight that has results.
85%
85%
SpeedOutput tokens per second.
55/s
55/s
EloLMArena rating and rank.
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ReleasedMonth of release.
2025-11
2025-11
Input / 1MUS dollars per 1M input tokens.
$1.25
$1.25
Output / 1MUS dollars per 1M output tokens.
$10.00
$10.00
1K chats2K tokens in, 500 out, each.
$7.50
$7.50
1K documents20K tokens in, 1K out, each.
$35.00
$35.00
1K agent tasks200K tokens in, 20K out, each.
$450.00
$450.00
ContextMaximum tokens in one request.
400K
400K
AgenticMulti-step tasks with tools.
56.1
57.5 best
CodingCode writing and repair.
49.8
53.2 best
ReasoningLogic problems and puzzles.
51.4
51.4
MultimodalTasks with images and text.
49.5
49.5
KnowledgeFacts and expert knowledge.
55.7
55.7
MultilingualTasks in many languages.
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InstructionTasks with strict prompt rules.
54.4
54.4
MathMath problems.
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Benchmarks
12 sharedOnly GPT-5.1-Codex: 3
GPT-5.1-Codex
GPT-5.1-Codex-Max