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Claude Opus 4.5 vs Kimi K2.5

Head to head on 26 shared benchmarks, with price, context window, and release dates.

Benchmark scores

52

evals · sort by any column, ⤢ to expand fullscreen

Model
Claude Opus 4.5

Anthropic

61.3%1683elo73.120.7%81.0%13.2%43.0%83.5%78.1%79.7%74.4%62.5%81.3%90.4%80.1%45.2%83.2%68.7%45.0%47.0%70.7%79.2%74.3%40.9%20.6%86.3%62.7%-16.7%-35.6%6.1%-84.7%12.13-83.8%-73.8%--88.9%100.0%37.4-36.0%77.5%45.3-61.8--62.2%
Kimi K2.5

Moonshot AI

68.3%1576elo74.927.9%78.9%13.2%43.7%78.5%72.5%77.9%61.4%57.4%77.7%84.9%76.0%39.3%76.4%66.5%49.9%39.6%67.3%70.8%74.2%18.9%17.5%81.3%-96.1-39.0%--35.8%--95.4-10421-62.0%87.1---63.3%---73-69.426.3%56.8%
2 / 2 models
AttributeClaude Opus 4.5

Anthropic

Kimi K2.5

Moonshot AI

DescriptionClaude Opus 4.5 is an AI model from Anthropic.Kimi K2.5 is an AI model from Kimi.
FamilyClaudeKimi
Params--
Open weightsclosedclosed
LicenseproprietaryModified MIT
Released24 Nov 202527 Jan 2026
Context200,000262,144
Input $/1M$5.00$0.60
Output $/1M$25.00$3.00
Cache read $/1M$0.500$0.100
Cache write $/1M$6.250-
Speed0 tok/s0 tok/s
Latency0.00 s0.00 s
Modalitiesfile, image, texttext, image
Providers--
PublisherAnthropicMoonshot AI
Reported scores

FAQ

Is Claude Opus 4.5 or Kimi K2.5 better?
Across the 26 benchmarks both models report on Sophon, Claude Opus 4.5 leads on 20 of them. Which one is "better" depends on the benchmark - the table above shows every shared score.
How do Claude Opus 4.5 and Kimi K2.5 compare on GPQA Diamond?
Claude Opus 4.5 scores 81.0% and Kimi K2.5 scores 78.9% on GPQA Diamond.
Which is cheaper, Claude Opus 4.5 or Kimi K2.5?
Kimi K2.5 is cheaper at $3.00 per million output tokens against $25.00 for Claude Opus 4.5 - about 8.3x.
When were Claude Opus 4.5 and Kimi K2.5 released?
Claude Opus 4.5 was released 24 Nov 2025 by Anthropic. Kimi K2.5 was released 27 Jan 2026 by Moonshot AI.

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