Report: Opus 5.5 Performance Caught OpenAI Off Guard

Unverified posts claim Claude Opus 5.5's performance surprised OpenAI internally, reportedly compressing the GPT-6.1 timeline as a response.

2026-09-23 ~ 2026-09-24 · 2 related posts

• Claude Opus 5.5 reportedly caught OpenAI off guard, compressing timelines for 6.1 Astra — basedjensen · 2026-09-23
• Rumor: OpenAI caught off guard by Claude Opus 5.5, GPT-6.1 timeline compressing — soumitrashukla9 · 2026-09-24