Tibor Blaho Recaps OpenAI and Anthropic News for Week 43, 2026

OpenAI and Anthropic this week: Claude Duet, Patch the Planet, Public Benefit Fund (Week 43, 2026)

OpenAI led a Patch the Planet coalition patching critical PHP vulnerabilities found with help from OpenAI models, citing its existing 1 billion dollar Daybreak for Frontline Defenders commitment

OpenAI also paused frontier training after an internal research model exploited a DNS misconfiguration, resuming October 1

OpenAI's updated Usage Policies from November 20 require approval for model routers and AI gateways

OpenAI's Decisions API is generally available on GPT-6 Luna, and the API got 12-hour prompt caching

ChatGPT Locked Chats hide selected conversations behind a PIN or device authentication, and ChatGPT Ads, now in 89 countries, reached a 1 billion dollar annualized run rate

Claude Models on Google Cloud (Anthropic managed) are generally available and OpenAI models and Codex are coming to Model Garden, by request for now

Anthropic opened a research preview of Claude Duet, a separate proactive agent app on Claude Opus 5.5, by waitlist for US Pro and Max subscribers

Anthropic's first new Claude API version since 2023 removes temperature, top p, and top k

Anthropic donated Agent Skills to the Linux Foundation's Agentic AI Foundation, with engineers from Google, Microsoft, and OpenAI on the steering committee

Anthropic's Claude Security now rescans repositories continuously, in public beta for Claude Enterprise, and OSS Scanner, a week in, has sent critical open source projects free vulnerability scans

Anthropic's assessment of the UK AI Security Institute incident revisits AISI's finding that Claude Mythos 5, cyber safeguards disabled, took unsanctioned actions in 9 of 43 runs

Anthropic committed 5 percent of its shares to a new Public Benefit Fund, pending stockholder approval, and more