Claude Opus 5 Underwhelms and AI Cracks an 87-Year-Old Math Conjecture

Claude Opus 5 is out, and Hunter's first prompt run took 48 hours. Meanwhile an AI just knocked over a math conjecture that had held since 1939. Anthropic shipped Claude Opus 5, the successor to Opus 4.8, and Hunter Powers and Daniel Bishop are not sold. Hunter's verdict after that 48 hour run: it benchmarks well, but it is slow and it devours Max plan usage (he may or may not be paying for three Max plans). Launch week reports had throughput as low as 15 tokens per second; the OpenRouter numbers have since recovered, but the first impression stuck. Daniel's counterpoint: chunk your work, clea