Anthropic's flagship for demanding reasoning, coding, and long-horizon agentic work.
OpenAI's high-capability model optimized for deep reasoning and accuracy on complex, high-stakes workloads.
No shared demos for these models yet.
No captured outputs for these models yet.
Both Claude Opus 5 and GPT 5.5 Pro 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.
Claude Opus 5 has a lower blended cost. Claude Opus 5: $5.00 input / $25.00 output. GPT 5.5 Pro: $30.00 input / $180.00 output.
GPT 5.5 Pro has a larger context window: Claude Opus 5 supports 1M tokens vs GPT 5.5 Pro at 1.1M tokens.
Yes, both Claude Opus 5 and GPT 5.5 Pro support vision/image input.
Key differences: Claude Opus 5 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 Claude Opus 5 and GPT 5.5 Pro for free on idapt.app to see which performs better for your specific needs.