Simon Willison Reviews DeepSeek-V4-Flash-0731: High Performance at Low Cost

Simon Willison on DeepSeek-V4-Flash-0731

Simon Willison Reviews DeepSeek-V4-Flash-0731: High Performance at Low Cost

I tested the new DeepSeek-V4-Flash-0731 model, which boasts 304 billion parameters and impressive agentic capabilities. Despite its massive size, it offers exceptional value with pricing significantly lower than competitors like MiniMax M3. While default settings produced poor image generation, increasing the reasoning effort yielded excellent results, positioning this model as a top contender for cost-effective intelligence.

It's looking very good on the Intelligence Index vs. Cost per Intelligence Index Task chart.

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2026-08-01