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Claude Opus 4.5 vs Claude Opus 4.6
Comprehensive side-by-side LLM comparison
Claude Opus 4.6 leads with 6.4% higher average benchmark score. Claude Opus 4.6 offers 64.0K more tokens in context window than Claude Opus 4.5. Both models have similar pricing. Overall, Claude Opus 4.6 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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Anthropic
Claude Opus 4.6, released by Anthropic in February 2026, is a large language model from the Claude 4 family designed for complex agent orchestration, extended reasoning, and long-form code generation. It features a 200K token context window (extendable to 1M tokens in beta), 128K maximum output tokens, native image understanding, and extended thinking with both standard and adaptive effort modes. Opus 4.6 targets multi-step agentic workflows, parallel tool use, and applications requiring sustained reasoning over large contexts.
3 months newer
Claude Opus 4.5
Anthropic
2025-11-01
Claude Opus 4.6
Anthropic
2026-02
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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Claude Opus 4.6
Input:$5.00
Output:$25.00
Performance Metrics
Context window and performance specifications
Average performance across 17 common benchmarks
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Claude Opus 4.5
Average Score:66.6%
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Claude Opus 4.6
Average Score:73.0%(+6.4%)
Performance comparison across key benchmark categories
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Claude Opus 4.5
Science87.0%
Knowledge90.8%
Agents78.4%
Multimodal72.3%
Coding61.5%
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Knowledge Cutoff
Training data recency comparison
Claude Opus 4.5
2025-05
Claude Opus 4.6
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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Claude Opus 4.6
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Claude Opus 4.5
Avg Score:66.6%
Providers:3
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Claude Opus 4.6
Avg Score:73.0%(+6.4%)
Providers:3