OpenAI's most powerful reasoning model — top across math, coding, and science.
Anthropic's flagship for demanding reasoning, coding, and long-horizon agentic work.
No shared demos for these models yet.
No captured outputs for these models yet.
Both o3 and Claude Opus 5 are capable AI models. The best choice depends on your specific use case: consider pricing, context window, speed, and which capabilities (vision, reasoning, audio) you need.
o3 has a lower blended cost. o3: $2.00 input / $8.00 output. Claude Opus 5: $5.00 input / $25.00 output.
Claude Opus 5 has a larger context window: o3 supports 200K tokens vs Claude Opus 5 at 1M tokens.
Yes, both o3 and Claude Opus 5 support vision/image input.
Key differences: o3 is significantly cheaper. Compare full specs on this page.
If cost is your priority, choose the cheaper option. If you need the highest intelligence for complex tasks, pick the higher-scoring model. For long documents or codebases, choose the larger context window. You can try both o3 and Claude Opus 5 for free on idapt.app to see which performs better for your specific needs.