Anthropic and OpenAI Ship Cheaper Models 101 Minutes Apart After 'Pace the Frontier' Pledge

Just days after lab leaders pledged to 'pace the frontier,' Anthropic and OpenAI released cheaper new models 101 minutes apart, igniting a price war. Claude Opus 5.5 beat Fable 5.1 on GDPval at 40% lower cost than Opus 5 and topped Code Arena.

2026-09-25 ~ 2026-09-25 · 4 related posts

• 101 minutes apart, Anthropic and OpenAI break the 'pace the frontier' pledge with cheaper models — altryne · 2026-09-25
• Anthropic and OpenAI Ship Cheaper Models 101 Minutes Apart, Igniting a Price War — altryne · 2026-09-25
• Podcast: Opus 5.5 Beats Fable 5.1 on GDPval at 40% Lower Cost, Tops Code Arena — thursdai_pod · 2026-09-25

1 near-duplicate retellings: thursdai_pod