Anthropic's fifth-generation Sonnet — near-Opus intelligence at Sonnet speed and price.
Ultra-fast and lightweight GPT-5 variant for low-latency tasks.
No shared demos for these models yet.
No captured outputs for these models yet.
Based on the Capability Index, Claude Sonnet 5 scores higher (80.1 vs 73.4). However, "better" depends on your use case — pricing, speed, context window, and specific capability needs all matter.
GPT 5 Nano has a lower blended cost. Claude Sonnet 5: $2.00 input / $10.00 output. GPT 5 Nano: $0.05 input / $0.40 output.
Claude Sonnet 5 has a larger context window: Claude Sonnet 5 supports 1M tokens vs GPT 5 Nano at 400K tokens.
Yes, both Claude Sonnet 5 and GPT 5 Nano support vision/image input.
Key differences: Claude Sonnet 5 has a notably higher capability index (6.7 point gap); GPT 5 Nano 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 Sonnet 5 and GPT 5 Nano for free on idapt.app to see which performs better for your specific needs.