Inside DeepSeek-V4-Flash-0731: 72,317 tensors of a harness-optimized MoE
Article summary
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On 2026-07-31, DeepSeek quietly shipped V4-Flash-0731 under an MIT license. Instead of reading the model card, VIDRAFT's Darwin model-inspection platform read the actual config.json and every weight shard — 72,317 tensors measured directly — to reconstruct how the model is built and, more interestingly, what it is built for . The shape, from the weights (not the docs) Component Specification Total parameters 284B Active per token ~12.8B (4.5%) Layers 43, all MoE Context ~1.05M tokens Experts…
1Key Takeaways
- On 2026-07-31, DeepSeek quietly shipped V4-Flash-0731 under an MIT license.
- Instead of reading the model card, VIDRAFT's Darwin model-inspection platform read the actual config.json and every weight shard — 72,317 tensors measured directly — to reconstruct how the model is built and, more interestingly, what it is built for .
- The shape, from the weights (not the docs) Component Specification Total parameters 284B Active per token ~12.8B (4.5%) Layers 43, all MoE Context ~1.05M tokens Experts….
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3Why it matters
Coding AI shifts how fast software ships and how much human review each change needs. DEV — ML reports that on 2026-07-31, DeepSeek quietly shipped V4-Flash-0731 under an MIT license.
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