DevDay keynote community post announcing the stream
OpenAI Developer Community ● Covered by 40 sources
OpenAI announced that GPT-4.5 is being re-introduced at DevDay 2026 and will be streamed for the community. The model is priced at $75 per million input tokens when relaunched. This changes developer access by restoring GPT-4.5’s original capabilities (including a 128,000-token context window) after a prior, short API availability cycle.
Why it matters
OpenAI’s developer-community post is shared as the formal announcement for joining the keynote stream. The issue frames it as an additional official place to track updates.