01 Aug 15, 2026 Read → DeepSeek V4 Flash vs Pro on Practical Prompt Tests DeepSeek V4 Pro scored 4.50 to Flash's 4.38 in one practical prompt-test batch, but cost about 21 times as much for candidate answers. Model evaluation Benchmarks LLMs DeepSeek DeepSeek V4 Flash DeepSeek V4 Pro