Security- and agent-focused updates led the day: OpenAI launched Daybreak with GPT-5.6-Cyber, Anthropic stabilized Sonnet 5 pricing and made Claude Code auto by default, while Vercel and Cloudflare shipped agent-oriented platform changes. Meta re-entered open weights with Muse Glimmer, long-context and agent-safety research landed, and big infra moves from Anthropic and a Maia 300 rumor underscored the compute race.