Yesterday in AI: 30 September 2026 — OpenAI Hits 800M, Claude Goes Federal
OpenAI hit 800M weekly users at DevDay and launched Managed Agents; Anthropic opened Claude to all three federal branches; a zero-dependency MCP server gave AI coding agents permanent code memory.
By OMC Editorial on 2026-10-01
TL;DR — OpenAI announced 800M weekly active users and Managed Agents at DevDay 2026; Anthropic made Claude for Government generally available to all three federal branches; a trending MCP server gives AI coding agents a persistent, sub-millisecond codebase knowledge graph.
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1️⃣ OpenAI DevDay 2026: 800M Weekly Users and Managed Agents Debut
- What: OpenAI held DevDay 2026 in San Francisco Sept 29, unveiling Managed Agents, an Apps SDK with partners Booking.com and Spotify, and a 20× API throughput increase.
- Why it matters: Managed Agents replaces the deprecated Agent Builder — it lets developers deploy fully hosted AI agents with customizable environments, skills, and plugins in one click, killing the infrastructure setup step.
- Key number: 800 million weekly active users — up from 500M that ChatGPT reported in early 2025.
OpenAI's annual developer conference was packed. ChatGPT reached 800M weekly active users, a milestone Sam Altman credited to enterprise adoption and international growth. The developer count doubled to 4 million, and API token throughput reached 6B tokens per minute — a 20× jump year-over-year.
The centrepiece announcement was Managed Agents, which replaces the now-shut-down Agent Builder deprecated June 3, dead November 30. Where Agent Builder required infrastructure setup, Managed Agents is serverless: define skills, attach tools, set a budget, and deploy. OpenAI also launched the Apps SDK, letting developers embed interactive mini-apps inside ChatGPT conversations — launch partners include Booking.com, Spotify, Canva, and Zillow.
📎 OpenAI DevDayhttps://openai.com/index/devday-2026/ · CNBC live updateshttps://www.cnbc.com/2026/09/29/openai-devday-2026-live-updates.html · Managed Agents analysishttps://cryptobriefing.com/openai-managed-agents-devday-2026/
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2️⃣ Anthropic Opens Claude to All Three Branches of the U.S. Federal Government
- What: Anthropic made Claude for Government generally available on September 30, expanding
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