Air Security, which builds a security service for extensions and other tools installed on AI agents, emerges from stealth with $50M led by Sequoia and Greenoaks (Meir Orbach/CTech)

Air Security raised $50 million led by Sequoia and Greenoaks. Anthropic launched Claude Fable 5.1 and Claude Mythos 5.1, offering 45% lower cost for agentic workloads. Nvidia will release DLSS 5 on September 3 for RTX 50-series GPUs. Mozilla added built-in ad blocking to Firefox on iOS via Apple’s WebKit Content Blocker and EasyList.