History / Opus 4.6 Stock ClimbMix Agent Run Mar 26 2026

Complete 4-model ClimbMix comparison — Opus finishes 3rd, Haiku wins Final ranking: Haiku (1.2953) > S4.6 (1.3093) > Opus (1.3569) > S4.0 (1.3588) Architecture discovery correlates perfectly with results, not model cost. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Update Opus 4.6 analysis to 70/100 exp — highest keep rate, still architecturally blind Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Add Opus 4.6 early analysis (23/100 exp) — 26% crash rate, "bigger is better" bias Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>