Opus 5.5 reportedly runs a native idea-level actor-critic self-play loop
sytelus · x · 2026-11-08
Developer sytelus observes that Opus 5.5 natively uses an idea-level actor-critic loop resembling self-play, which he says dramatically improves output quality — something he hasn't seen in Astra/Sol. The attached screenshot shows a multi-agent workflow with 8 analysts, an architect agent synthesizing catalogs, critics reviewing for completeness, and a reviser applying fixes.
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