OpenAI's original omni model supporting text and image inputs.
Anthropic's Sonnet-class model for well-scoped everyday work, a direct upgrade over Claude Sonnet 5.
No shared demos for these models yet.
No captured outputs for these models yet.
Both GPT 4o and Claude Sonnet 5.5 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.
Claude Sonnet 5.5 has a lower blended cost. GPT 4o: $2.50 input / $10.00 output. Claude Sonnet 5.5: $2.00 input / $10.00 output.
Claude Sonnet 5.5 has a larger context window: GPT 4o supports 128K tokens vs Claude Sonnet 5.5 at 1M tokens.
Yes, both GPT 4o and Claude Sonnet 5.5 support vision/image input.
Key differences: only Claude Sonnet 5.5 offers extended reasoning mode. 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 GPT 4o and Claude Sonnet 5.5 for free on idapt.app to see which performs better for your specific needs.