Claude Opus 4.7

Anthropic just dropped what they're calling their most capable model, and honestly — the self-verification thing is the real story here. Claude Opus 4.7 can actually check its own work across long multi-step tasks while keeping memory coherent across sessions, which means senior engineers stop writing every line and start setting direction instead. The /ultrareview feature for deep code reviews is a nice touch, and the effort control slider letting you trade reasoning depth for latency is exactly the kind of knob developers actually want. Yes, the community notes say it's definitely expensive — but if you're building AI agents that need to run for hours without dropping the thread, the ROI on not babysitting the thing probably makes the math work out.