Anthropic's Sonnet-class model for well-scoped everyday work, a direct upgrade over Claude Sonnet 5.
Cost-efficient reasoning model for STEM tasks.
No shared demos for these models yet.
No captured outputs for these models yet.
Both Claude Sonnet 5.5 and o3-mini 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-mini has a lower blended cost. Claude Sonnet 5.5: $2.00 input / $10.00 output. o3-mini: $1.10 input / $4.40 output.
Claude Sonnet 5.5 has a larger context window: Claude Sonnet 5.5 supports 1M tokens vs o3-mini at 200K tokens.
Claude Sonnet 5.5 supports vision/image input, but o3-mini does not.
Key differences: only Claude Sonnet 5.5 supports vision input. 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 Sonnet 5.5 and o3-mini for free on idapt.app to see which performs better for your specific needs.