DeepSeek released the official public beta of V4-Flash-0731 on July 31, and the benchmark numbers are worth a second look. Same 284B MoE architecture, same $0.14 per million input tokens, and a post-training rerun that pushed agent benchmark scores past DeepSeek's own V4-Pro-Preview on every metric the company published. What Actually Changed Nothing about the architecture or scale changed. DeepSeek ran a new round of post-training, the phase that shapes how a pre-trained model uses its knowledge, not what knowledge it holds. The underlying structure (284B total parameters, 13B active per token, with CSA and HCA sparse attention layers) is identical to the Flash-Preview build. DeepSeek just worked the behavioral layer on top again. That alone shouldn't be remarkable. Except for how much it moved the needle. The Benchmark Story Here are the numbers DeepSeek published for Flash-0731 vs Flash-Preview vs V4-Pro-Preview: DeepSWE: 7.3 (Flash-Preview) to 54.4 (0731). That...
Supabase open-sourced their evals framework last week (supabase/evals, Apache-2.0), and I think it's the most useful thing published about AI coding agent evaluation in months. Not because of which model topped the leaderboard. Because of how they designed the measurement itself. What They're Testing and Why It's Hard Supabase built their evals around a three-axis grid: products (database, auth, storage, edge-functions, realtime, cron, queues, vectors, data-api), topics (RLS, security, migrations, SQL, SDK, observability, self-hosting, declarative-schema), and stages (build, deploy, investigate, resolve). That last axis is where it gets real. "Build" is the easy part. Any capable coding agent can scaffold a schema. "Deploy" and "Investigate" are where agents start to diverge. "Resolve" is where you find out if an agent can fix a broken RLS policy without silently breaking three others it didn't know existed. They're runni...