OpenAI recapped DevDay 2026, while ChatGPT plan changes and an AWS agent toolkit moved in the same period.
OpenAI published its DevDay 2026 recap. Japanese outlets reported that ChatGPT's top plan reopens to new sign-ups with the 5-hour limit removed, and that an "Ultrafast" mode is tied to the $500/month tier. AWS open-sourced its Strands harness for building AI agents.
Developer announcements and plan or pricing changes landed in the same week, shifting usage terms noticeably. AWS's model-agnostic open-source release is a separate thread, but it reads alongside OpenAI's moves as agent-platform competition.
Watch when DevDay features reach general availability, how the top-tier quotas and pricing work in practice, and how widely the Strands harness is adopted.