I read all 232 pages of the Opus 4.7 system card

A system card is the document Anthropic publishes with every major Claude release, detailing capabilities and safety evaluations. The Claude Opus 4.7 edition, published April 16, 2026, runs 232 pages. I read all of it. One number from deep inside: Opus 4.7 rated its own circumstances at 4.49 out of 7, the highest score any Claude model has ever given itself. Mythos Preview, the previous peak, was 3.98. That 0.51-point delta is the largest generation-over-generation welfare jump Anthropic has me...