opus-4.6
2 articles
Karpathy's Honest Take: AI Agents Still Can't Optimize My Code (But I Haven't Given Up)
Opus 4.6 & Codex 5.3 sped up Karpathy's GPT-2 training by 3 mins. Karpathy failed similar attempts, noting AI's weak open-ended code optimization. Opus deletes comments, ignores CLAUDE.md, and errs. Yet, with oversight, models are useful.
Claude Opus 4.6 Just Got 2.5x Faster — But at 6x the Price. Should You Turn It On?
Anthropic just released Opus 4.6 Fast Mode — same model, 2.5x faster responses. The catch? API pricing jumps from $5/$25 to $30/$150 per MTok — a 6x increase. Boris Cherny calls it a 'huge unlock.' But when should you actually use it? Let's do the math.