Original DeepSeek V3 — the model that put DeepSeek on the map.
Anthropic's fifth-generation Sonnet — near-Opus intelligence at Sonnet speed and price.
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 78.7). However, "better" depends on your use case — pricing, speed, context window, and specific capability needs all matter.
DeepSeek V3 has a lower blended cost. DeepSeek V3: $0.20 input / $0.80 output. Claude Sonnet 5: $2.00 input / $10.00 output.
Claude Sonnet 5 has a larger context window: DeepSeek V3 supports 128K tokens vs Claude Sonnet 5 at 1M tokens.
Claude Sonnet 5 supports vision/image input, but DeepSeek V3 does not.
Key differences: DeepSeek V3 is significantly cheaper; only Claude Sonnet 5 supports vision input; only Claude Sonnet 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 DeepSeek V3 and Claude Sonnet 5 for free on idapt.app to see which performs better for your specific needs.