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Claude Opus 4.6 vs GPT-5.1 Thinking
Comprehensive side-by-side LLM comparison
Claude Opus 4.6 leads with 10.4% higher average benchmark score. Claude Opus 4.6 is available on 3 providers. Overall, Claude Opus 4.6 is the stronger choice for coding 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.
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OpenAI
GPT-5.1 Thinking, released by OpenAI in November 2025, is an extended reasoning variant from the GPT-5.1 family that applies chain-of-thought processing to improve accuracy on complex reasoning, mathematics, and coding tasks. It targets analytical workflows where deliberate reasoning over a problem significantly improves output quality.
3 months newer
GPT-5.1 Thinking
OpenAI
2025-11
Claude Opus 4.6
Anthropic
2026-02
Performance Metrics
Context window and performance specifications
Average performance across 2 common benchmarks
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Claude Opus 4.6
Average Score:60.4%(+10.4%)
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GPT-5.1 Thinking
Average Score:50.0%
Performance comparison across key benchmark categories
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Claude Opus 4.6
Coding80.8%(+4.5%)
Reasoning40.0%(+16.3%)
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GPT-5.1 Thinking
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Knowledge Cutoff
Training data recency comparison
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 4.6
3 providers
Anthropic
AWS Bedrock
Google Cloud Vertex AI
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GPT-5.1 Thinking
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Claude Opus 4.6
Avg Score:60.4%(+10.4%)
Providers:3
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GPT-5.1 Thinking
Avg Score:50.0%
Providers:0