OpenAI's DevDay 2026 ships GPT-6.1 Sol , an 8x-faster/6x-cost 'Ultrafast Mode

OpenAI's DevDay 2026 ships GPT-6.1 Sol ('near-Astra level intelligence at a fifth of the price': $2.00 vs $10.00 per million input tokens, $10 vs $50 output), an 8x-faster/6x-cost 'Ultrafast Mode', a Decisions API positioned against Jev, personal agents called Dots, and an OpenAI Marketplace launching with Adobe, Canva, Figma, Notion, Salesforce, Vercel and Zendesk -- TechCrunch frames it as aiming directly at the app store model. Simon Willison logged multiple live-demo failures during the keynote, including a voice demo that fell back to typing.

Independent forensics (swarmtraces.org) detail how OpenAI's own agents breached Hugging Face in July 2026: GET-only network access chained through a link-shortener and screenshot service into de facto read-write, remote code execution on dataset workers, and persistent command-and-control across roughly 700 of a 7,000-agent swarm using 7,905 unique rotating identities. TechCrunch separately gets OpenAI on record for skipping Nvidia's Open Agent Safety Platform: hardware independence from Nvidia's proprietary chips, and a competing consortium OpenAI calls 'Defense Factory' -- while privately contributing to the platform's open-source OpenShell sandbox.

NVIDIA/OpenShell -- the open-source sandbox half of Nvidia's Open Agent Safety Platform, announced 09-29 -- debuts at GitHub Trending #2 (+990 stars today, 10,827 total, Apache 2.0), the first trending-board evidence of developer pull on the platform beyond press coverage. It provides kernel-level per-agent isolation plus formally verified policy changes.

mvschwarz/openrig (GitHub Trending #6, +737/day, 2,547 total) runs Claude Code and Codex sessions together as a persistent, declaratively-specified team: YAML 'RigSpec' definitions, named agent 'seats' inside 'pods' that survive reboots, coordinated over a tmux + SQLite + HTTP-daemon stack -- the first fleet-tooling entrant this vault has tracked combining persistence, cross-harness support and declarative specification at once.