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Claude Opus 4.5 vs Kimi K2.5
Comprehensive side-by-side LLM comparison
Claude Opus 4.5 leads with 7.2% higher average benchmark score. Kimi K2.5 offers 192 more tokens in context window than Claude Opus 4.5. Kimi K2.5 is $22.50 cheaper per million tokens. Claude Opus 4.5 supports multimodal inputs. Claude Opus 4.5 is available on 3 providers. Overall, Claude Opus 4.5 is the stronger choice for coding tasks.
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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 K2.5, 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.
2 months newer
Claude Opus 4.5
Anthropic
2025-11-01
Kimi K2.5
Moonshot AI
2026-01
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 K2.5
Input:$1.50
Output:$6.00($22.50 cheaper)
Performance Metrics
Context window and performance specifications
Average performance across 5 common benchmarks
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Claude Opus 4.5
Average Score:56.3%(+7.2%)
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Kimi K2.5
Average Score:49.1%
Performance comparison across key benchmark categories
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Claude Opus 4.5
Agents66.3%(+3.0%)
Coding61.5%(+8.9%)
Reasoning30.8%(+6.4%)
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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 K2.5
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Claude Opus 4.5
Avg Score:56.3%(+7.2%)
Providers:3
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Kimi K2.5
Avg Score:49.1%
Providers:1