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Claude Opus 4.1 vs Kimi K2.5
Comprehensive side-by-side LLM comparison
Kimi K2.5 leads with 2.3% higher average benchmark score. Kimi K2.5 offers 32.2K more tokens in context window than Claude Opus 4.1. Kimi K2.5 is $82.50 cheaper per million tokens. Claude Opus 4.1 supports multimodal inputs. Claude Opus 4.1 is available on 3 providers. Both models have their strengths depending on your specific coding needs.
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Anthropic
Claude Opus 4.1, released by Anthropic in August 2025, is a large language model from the Claude 4 family optimized for demanding reasoning, multi-step coding, and extended analysis tasks. It features a 200K token context window, 32K maximum output tokens, native image understanding, and extended thinking capabilities. Opus 4.1 targets complex problem-solving, multi-turn reasoning workflows, and applications requiring deep analysis with integrated tool use.
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Moonshot AI
Kimi K2.5, released by Moonshot AI in January 2026, is an updated Mixture-of-Experts large language model with 1 trillion total parameters and 32 billion active parameters. It builds on Kimi K2 with improved coding performance across multiple languages and an expanded context window. Kimi K2.5 targets agentic development workflows, polyglot code generation, and open-source deployments requiring large-scale MoE reasoning.
4 months newer
Claude Opus 4.1
Anthropic
2025-08-05
Kimi K2.5
Moonshot AI
2026-01
Pricing Comparison
Cost per million tokens (USD)
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Claude Opus 4.1
Input:$15.00
Output:$75.00
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Kimi K2.5
Input:$1.50
Output:$6.00($82.50 cheaper)
Performance Metrics
Context window and performance specifications
Average performance across 1 common benchmarks
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Claude Opus 4.1
Average Score:74.5%
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Kimi K2.5
Average Score:76.8%(+2.3%)
Performance comparison across key benchmark categories
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Claude Opus 4.1
Coding74.5%
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Kimi K2.5
Coding76.8%(+2.3%)
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Knowledge Cutoff
Training data recency comparison
Claude Opus 4.1
2025-01
More recent knowledge cutoff means awareness of newer technologies and frameworks
Provider Availability & Performance
Available providers and their performance metrics
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Claude Opus 4.1
3 providers
Anthropic
AWS Bedrock
Google Cloud Vertex AI
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Kimi K2.5
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Claude Opus 4.1
Avg Score:74.5%
Providers:3
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Kimi K2.5
Avg Score:76.8%(+2.3%)
Providers:1