High-performance model for real-world agents and coding.
Open-source 1.6T-parameter MoE with 49B active, built for advanced reasoning and long-horizon agents.
No shared agent demos for these models yet.
No captured outputs for these models yet.
Based on the Capability Index, DeepSeek V4 Pro scores higher (81.6 vs 78.9). However, "better" depends on your use case — pricing, speed, context window, and specific capability needs all matter.
DeepSeek V4 Pro has a lower blended cost. Claude Sonnet 4.5: $3.00 input / $15.00 output. DeepSeek V4 Pro: $0.43 input / $0.87 output.
DeepSeek V4 Pro has a larger context window: Claude Sonnet 4.5 supports 1M tokens vs DeepSeek V4 Pro at 1M tokens.
Claude Sonnet 4.5 supports vision/image input, but DeepSeek V4 Pro does not.
DeepSeek V4 Pro scores higher on SWE-bench Verified: Claude Sonnet 4.5 resolves 71% vs DeepSeek V4 Pro at 78%.
Key differences: DeepSeek V4 Pro is significantly cheaper; only Claude Sonnet 4.5 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 4.5 and DeepSeek V4 Pro for free on idapt.app to see which performs better for your specific needs.