DeepSeek-V4-Pro is here — and it's redefining cost-performance.
✅ 1.6T total parameters / 49B activated ✅ 1/10th the price of Claude Opus 5 ✅ FIM code completion mastery ✅ Full Agent toolchain support We tested it head-to-head against Claude Opus 5.
Build karpathy's second brain with claude opus 5 + obsidian
Andrej Karpathy (OpenAI co-founder) shared an architecture that turns Claude into a persistent second brain not just a basic chat window how it works: point Claude Code at an Obsidian vault folder drop articles,
Opus 5 built this entire three.js landing page from one prompt and self-verified for 2 hours.
I open-sourced the Sylva three.js site and the skills behind it.
I started with one reference and asked Opus 5 to recreate it in Three.js as a single HTML file (looped for 2 hours). The moss root is procedural geometry with around 130,000 instanced blades, and all the code is
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