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Claude Opus 4.1 vs Claude Opus 4.5
Comprehensive side-by-side LLM comparison
Claude Opus 4.5 leads with 17.1% higher average benchmark score. Claude Opus 4.5 offers 32.0K more tokens in context window than Claude Opus 4.1. Claude Opus 4.5 is $60.00 cheaper per million tokens. Overall, Claude Opus 4.5 is the stronger choice for coding tasks.
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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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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.
2 months newer
Claude Opus 4.1
Anthropic
2025-08-05
Claude Opus 4.5
Anthropic
2025-11-01
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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Claude Opus 4.5
Input:$5.00
Output:$25.00($60.00 cheaper)
Performance Metrics
Context window and performance specifications
Average performance across 6 common benchmarks
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Claude Opus 4.1
Average Score:40.0%
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Claude Opus 4.5
Average Score:57.1%(+17.1%)
Performance comparison across key benchmark categories
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Claude Opus 4.1
Science80.9%
Coding74.5%
Tool Use40.9%
Agents22.3%
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Knowledge Cutoff
Training data recency comparison
Claude Opus 4.1
2025-01
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 4.1
3 providers
Anthropic
AWS Bedrock
Google Cloud Vertex AI
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Claude Opus 4.5
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Claude Opus 4.1
Avg Score:40.0%
Providers:3
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Claude Opus 4.5
Avg Score:57.1%(+17.1%)
Providers:3