OpenAI DevDay keynote recap (2025)

Massive scale update:

→ 800M+ weekly ChatGPT users

→ 6 billion tokens processed per minute

→ 1 billion total users by year-end looking very likely

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Here’s everything new from OpenAI;

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1. Apps inside ChatGPT

OpenAI launched the new Apps SDK, letting developers build full apps that run inside ChatGPT:

- Apps SDK lets devs embed full apps inside ChatGPT

- Early partners: Canva, Zillow, Coursera, Figma

- SDK in beta, store + monetization coming soon

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2. AgentKit launched

OpenAI’s new suite for building & deploying AI agents:

- Agent Builder → a simple drag-and-drop editor (like n8n) to design AI agents

- ChatKit → ready-made chat interface so your agent can talk like ChatGPT

- Evals → test and improve your agent’s performance

- Connectors → let your agent pull live info from apps, websites, or databases.

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3. Codex updates:

- GPT-5 Codex now generally available

- New Slack integration + SDK for developers

- Added enterprise controls & analytics

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4. API & Model updates:

- GPT-5 Pro now in API ($15 input / $120 output per 1 M tokens)

- GPT-Realtime-Mini: 70% cheaper, optimized for live voice interactions

- Sora 2 added to API — includes sound, remix options, and duration controls