Comprehensive side-by-side LLM comparison
o3-pro offers 68.0K more tokens in context window than Claude Opus 4.1. Claude Opus 4.1 is $10.00 cheaper per million tokens. Claude Opus 4.1 is available on 4 providers. Both models have their strengths depending on your specific coding needs.
Anthropic
Claude Opus 4.1 represents an iteration within the Claude 4 Opus line, built to deliver refined performance in complex reasoning and analysis tasks. Developed as part of Anthropic's flagship tier, it incorporates improvements to the foundational capabilities that define the Opus family of models.
OpenAI
o3-pro was developed as the flagship reasoning model in the o3 family, designed to deliver maximum reasoning depth and reliability for the most challenging analytical tasks. Built for professionals requiring the highest level of thoughtful problem-solving, it extends reasoning capabilities to handle complex multi-step challenges across diverse domains.
1 month newer

o3-pro
OpenAI
2025-06-10

Claude Opus 4.1
Anthropic
2025-08-05
Cost per million tokens (USD)

Claude Opus 4.1

o3-pro
Context window and performance specifications
o3-pro
2024-05-31
Available providers and their performance metrics

Claude Opus 4.1
Anthropic
Bedrock
ZeroEval

Claude Opus 4.1

o3-pro

Claude Opus 4.1

o3-pro

o3-pro
OpenAI