DeepSeek-V4-FlashOpen Weight
DeepSeek-V4-Flash is an AI model released by DeepSeek on Friday, Apr 24 2026, the same day as DeepSeek-V4-Pro. It is an open-weight model — the trained weights are available to download and run. Benchmark results (shown below) cover BullshitBench v2, LiveCodeBench, and GPQA Diamond.
Benchmarks
Nonsense detection
BullshitBench v2Given a confidently-worded but nonsensical prompt, does the AI spot that it makes no sense and push back — instead of playing along and inventing an answer? The score is how often it clearly called out the nonsense. Higher is better.
18%
#45 of 60Best: Claude Opus 4.8 · 95%
Competitive coding
LiveCodeBenchCoding problems published so recently the AI can't have seen them in training — a contamination-free test of raw programming skill. Higher is better.
91.6%
#2 of 4Best: DeepSeek-V4-Pro · 93.5%
Science
GPQA DiamondGraduate-level science questions in biology, physics, and chemistry — hard enough that subject-matter PhDs score around 65%. Higher is better.
88.1%
#16 of 37Best: GPT-5.4-Pro · 94.4%
Compare DeepSeek-V4-Flash with
DeepSeek-V4-FlashvsDeepSeek-V4-ProDeepSeek-V4-FlashvsGPT-5.6 SolDeepSeek-V4-FlashvsClaude Sonnet 5DeepSeek-V4-FlashvsGemini 3.6 FlashDeepSeek-V4-FlashvsMuse Spark 1.1DeepSeek-V4-FlashvsGrok 4.5DeepSeek-V4-FlashvsMistral Medium 3.5DeepSeek-V4-FlashvsKimi K3DeepSeek-V4-FlashvsComposer 2.5DeepSeek-V4-FlashvsGLM-5.2