Comprehensive side-by-side LLM comparison
Claude Opus 4 leads with 10.9% higher average benchmark score. Claude Opus 4 offers 28.0K more tokens in context window than o1. o1 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 was developed as part of OpenAI's reasoning-focused model series, designed to spend more time thinking before responding. Built to excel at complex reasoning tasks in science, coding, and mathematics, it employs extended internal reasoning processes to solve harder problems than traditional language models through careful step-by-step analysis.
5 months newer

o1
OpenAI
2024-12-17

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

Claude Opus 4

o1
Context window and performance specifications
Average performance across 5 common benchmarks

Claude Opus 4

o1
Performance comparison across key benchmark categories

Claude Opus 4

o1
Available providers and their performance metrics

Claude Opus 4
Anthropic
Bedrock
ZeroEval

Claude Opus 4

o1

Claude Opus 4

o1

o1
Azure
OpenAI