Anthropic’s September 2026 release of Claude Opus 5.5, which scored 54.6% on HLE-Diamond at standard high-reasoning effort and up to 67.9% at maximum effort on the 1,000-question refined Humanity’s Last Exam benchmark, anchors trader expectations for the next Opus (5.6+). The model trails only Gemini 4 Carbon on independent leaderboards while outperforming most GPT-6 variants on the knowledge partition. Anthropic’s rapid cadence—Opus 5 in July followed by 5.5 two months later—combined with ongoing frontier-model competition from Google and OpenAI, supports market-implied odds above 85% for a 60%+ debut score. Key upcoming catalysts include potential point releases or system-card updates before the July 2027 resolution, though exact thresholds depend on verified submissions without tools.