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Claude Opus 4.5 vs Kimi K2 Thinking
Comprehensive side-by-side LLM comparison
Both models show comparable benchmark performance. Kimi K2 Thinking offers 192 more tokens in context window than Claude Opus 4.5. Kimi K2 Thinking is $25.00 cheaper per million tokens. Claude Opus 4.5 supports multimodal inputs. Claude Opus 4.5 is available on 3 providers. Both models have their strengths depending on your specific coding needs.
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Anthropic
Claude Opus 4.5, released by Anthropic in November 2025, is a large language model from the Claude 4.5 family built for demanding reasoning tasks, advanced code generation, and complex agentic workflows. It features a 200K token context window, 64K maximum output tokens, native image understanding, and extended thinking with configurable effort levels. Opus 4.5 targets deep analytical work, multi-step tool orchestration, and applications requiring sustained reasoning across long, complex tasks.
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Moonshot AI
Kimi K2 Thinking, released by Moonshot AI on November 6, 2025, is a reasoning-focused variant of Kimi K2 with 1 trillion total parameters and 32 billion active parameters, featuring extended chain-of-thought processing for complex problem solving. It builds on K2's agentic coding strengths with additional capabilities for mathematical and scientific reasoning. Kimi K2 Thinking targets open-source deployments requiring deep, deliberate reasoning across coding and analytical domains.
5 days newer
Claude Opus 4.5
Anthropic
2025-11-01
Kimi K2 Thinking
Moonshot AI
2025-11-06
Pricing Comparison
Cost per million tokens (USD)
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Claude Opus 4.5
Input:$5.00
Output:$25.00
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Kimi K2 Thinking
Input:$1.00
Output:$4.00($25.00 cheaper)
Performance Metrics
Context window and performance specifications
Average performance across 1 common benchmarks
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Claude Opus 4.5
Average Score:43.8%
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Kimi K2 Thinking
Average Score:43.8%
Performance comparison across key benchmark categories
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Claude Opus 4.5
Coding43.8%
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Kimi K2 Thinking
Coding43.8%
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Knowledge Cutoff
Training data recency comparison
Claude Opus 4.5
2025-05
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 4.5
3 providers
Anthropic
AWS Bedrock
Google Cloud Vertex AI
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Kimi K2 Thinking
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Claude Opus 4.5
Avg Score:43.8%
Providers:3
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Kimi K2 Thinking
Avg Score:43.8%
Providers:1