Comprehensive side-by-side LLM comparison
Claude Opus 4 leads with 18.8% higher average benchmark score. Claude Opus 4 offers 167.2K more tokens in context window than o1-preview. o1-preview is $15.00 cheaper per million tokens. Claude Opus 4 supports multimodal inputs. Claude Opus 4 is available on 4 providers. Overall, Claude Opus 4 is the stronger choice for coding tasks.
Anthropic
Claude Opus 4 was developed as the flagship model in the Claude 4 generation, designed to push the boundaries of AI capability in complex reasoning, analysis, and multi-step problem-solving. Built to handle the most demanding enterprise tasks, it represents Anthropic's highest tier of intelligence and capability.
OpenAI
o1-preview was introduced as an early version of OpenAI's reasoning model series, designed to demonstrate the potential of AI models that engage in extended thinking before responding. Built to solve complex problems through deliberate reasoning processes, it represented an initial step toward more thoughtful and analytical AI systems.
8 months newer

o1-preview
OpenAI
2024-09-12

Claude Opus 4
Anthropic
2025-05-22
Cost per million tokens (USD)

Claude Opus 4

o1-preview
Context window and performance specifications
Average performance across 2 common benchmarks

Claude Opus 4

o1-preview
Performance comparison across key benchmark categories

Claude Opus 4

o1-preview
Available providers and their performance metrics

Claude Opus 4
Anthropic
Bedrock
ZeroEval

Claude Opus 4

o1-preview

Claude Opus 4

o1-preview

o1-preview
Azure
OpenAI