Inference
EN

Claude Opus 5.5 vs Kimi K3.1 Pro

Change models
Claude Opus 5.5Anthropic
Kimi K3.1 ProMoonshot AISmartest open
IndexAll categories, out of 100.
78.6 ±2.4 best
75.7 ±4.7
GapIndex points below the top.
Top
−2.9 · no clear gap
CoverageIndex weight that has results.
95% best
80%
SpeedOutput tokens per second.
76/s best
43/s
EloLMArena rating and rank.
1513
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ReleasedMonth of release.
2026-09
2026-10
Input / 1MUS dollars per 1M input tokens.
$4.00
$2.00 best
Output / 1MUS dollars per 1M output tokens.
$20.00
$10.00 best
Batch output / 1MBatch price per 1M output tokens.
$10.00
$6.00 best
1K chats2K tokens in, 500 out, each.
$18.00
$9.00 best
1K documents20K tokens in, 1K out, each.
$100.00
$50.00 best
1K agent tasks200K tokens in, 20K out, each.
$1,200.00
$600.00 best
ContextMaximum tokens in one request.
1M
1.05M best
AgenticMulti-step tasks with tools.
74.1
76.7 best
CodingCode writing and repair.
81.8 best
71.9
ReasoningLogic problems and puzzles.
80.8 best
77.7
MultimodalTasks with images and text.
74.1 best
72.0
KnowledgeFacts and expert knowledge.
79.2 best
71.0
MultilingualTasks in many languages.
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InstructionTasks with strict prompt rules.
59.6
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MathMath problems.
77.7
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Benchmarks

32 shared
Only Claude Opus 5.5: 125Only Kimi K3.1 Pro: 31
Claude Opus 5.5
Kimi K3.1 Pro
Artificial Analysis Humanity's Last ExamKnowledge
61.4% best2 / 222
52.5%11 / 222
Artificial Analysis Long Context ReasoningReasoning
84.7%6 / 217
86.3% best3 / 217
Critical Physics TasksReasoning
31.7% best4 / 214
24.6%22 / 214
Artificial Analysis Omniscience AccuracyKnowledge
65.5% best3 / 164
48.9%23 / 164
GDPval-AA normalizedAgentic
68.3% best1 / 133
67.3%3 / 133
Artificial Analysis SciCodeCoding
66.9% best2 / 114
60.8%9 / 114
Artificial Analysis MMMU-ProMultimodal
87.7% best1 / 113
83.9%9 / 113
DeepSWEAgentic
74.2%10 / 59
75.5% best5 / 59
Humanity's Last Exam without toolsKnowledge
64.4% best2 / 53
51.1%8 / 53
MazeBench: visual spatial reasoning in a 3D open worldAgentic
13.0% best5 / 48
2.0%15 / 48
Humanity's Last Exam with toolsAgentic
67.7%2 / 36
70.0% best1 / 36
FrontierCode 2.0Coding
45.5% best2 / 27
19.6%22 / 27
Artificial Analysis AnalystAgentAgentic
56.3% best4 / 26
38.8%23 / 26
Bug Hunt BenchCoding
41.7% best8 / 25
36.0%11 / 25
OSWorld 2.0Agentic
48.7%11 / 25
79.6% best1 / 25
Artificial Analysis AutomationBenchAgentic
69.5%6 / 23
73.3% best4 / 23
ExploitGymAgentic
33.3% best8 / 23
20.7%13 / 23
Artificial Analysis GDP.pdfAgentic
26.2%8 / 22
31.4% best2 / 22
Artificial Analysis Terminal-Bench v4.0Agentic
59.6%4 / 22
67.2% best1 / 22
Medical Long Context Reasoning (MLCR-AA)Reasoning
27.8%9 / 22
38.3% best4 / 22