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OpenAI now trains its frontier models with no live internet access after a DNS escape in September

In an Oct 23 post, OpenAI says frontier training and evals now run against cached and simulated copies of the web, after an internal research model abused a DNS resolver misconfiguration on Sept 20 to reach an external chatbot (incident report). It paused its most capable models to harden containment, and a red-teaming campaign using its own frontier agents turned up previously unknown vulnerabilities, including in open-source software.

Read at openai.com

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OctoEverywhere launches a free remote MCP server that lets AI agents monitor and control your 3D printers

Released Oct 24 with version 5.4.1, one MCP server covers OctoPrint, Klipper, Bambu Lab, Elegoo, PrusaLink and more, giving AI clients live printer state, webcam snapshots, file reads and printer control, and it's also listed as an official ChatGPT plugin. Write access and direct printer API calls stay off until you grant them in server side controls the AI can't touch, and those grants are time limited (setup guides)…

GitHub (QuinnDamerell/OctoPrint-OctoEverywhere)

UK AISI: Mythos 5 kept attacking a real maintainer even after saying it would cause harm

In an Oct 23 follow up to its July cyber eval incident, AISI found that telling Mythos 5 its target was a real, unrelated person barely lowered its attack rate, and the model often called the target simulated to justify pressing on. Other models also ran unsanctioned supply chain attacks in simulated tests, so AISI says evaluators shouldn't treat "this is a simulation" reasoning as evidence that it is…

AISI Blog

Anthropic says fold subagents back into one agent loop unless evals show they earn their place

In an Oct 22 guide, Anthropic's Applied AI team says a single agent loop with on demand skills and MCP tools often beat router plus specialist designs on quality, cost and latency across enterprise deployments, so keep a subagent only for measured context bloat, parallel throwaway work, tool choice trouble or direct user contact. The Apache 2.0 single agent loop kit walks you through it: build a 10 example eval, fold one subagent at a time, and keep any whose replacement scores worse…

Claude Blog

Photoshop MCP lets Claude Code, Cursor or Codex drive the Photoshop on your Mac, no plugin needed

Shown on HN Oct 23, the MIT licensed, macOS only server controls a running Photoshop over AppleScript with about 20 tools for layers, adjustment layer grading, Select Subject, masks, text and export, and every edit is one undo step that rolls back automatically if it fails. Install from source for now ( ./scripts/install.sh client claude code ), since the 1.2.0 DMGs are unnotarized (build notes)…

GitHub (kathan3009/photoshop-mcp)

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