GPT-5.1-Codex vs Kimi K2.5 (Reasoning)
Change modelsGPT-5.1-CodexOpenAI
Kimi K2.5 (Reasoning)Moonshot AI
IndexAll categories, out of 100.
52.9 ±5.7
53.0 ±4.0 best
GapIndex points below the top.
−0.1 · no clear gap
Top
CoverageIndex weight that has results.
85%
95% best
SpeedOutput tokens per second.
55/s
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EloLMArena rating and rank.
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ReleasedMonth of release.
2025-11
2026-01
Input / 1MUS dollars per 1M input tokens.
$1.25
$0.60 best
Output / 1MUS dollars per 1M output tokens.
$10.00
$3.00 best
1K chats2K tokens in, 500 out, each.
$7.50
$2.70 best
1K documents20K tokens in, 1K out, each.
$35.00
$15.00 best
1K agent tasks200K tokens in, 20K out, each.
$450.00
$180.00 best
ContextMaximum tokens in one request.
400K best
128K
AgenticMulti-step tasks with tools.
56.1 best
50.6
CodingCode writing and repair.
49.8
56.0 best
ReasoningLogic problems and puzzles.
51.4
52.1 best
MultimodalTasks with images and text.
49.5
53.9 best
KnowledgeFacts and expert knowledge.
55.7 best
55.5
MultilingualTasks in many languages.
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InstructionTasks with strict prompt rules.
54.4
54.6 best
MathMath problems.
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52.2
Benchmarks
9 sharedOnly GPT-5.1-Codex: 6Only Kimi K2.5 (Reasoning): 14
GPT-5.1-Codex
Kimi K2.5 (Reasoning)