DeepSeek V4 Is Back and It’s Cheap, Claude Agents Broker Real Deals, Google Bets $40B on Anthropic

Today we’re covering the biggest AI stories of April 27th, 2026. DeepSeek is back with V4 Pro — an open-source model with a 1 million token context window and pricing that significantly undercuts GPT-5.5 and Opus 4.7, while also running on Huawei chips, giving China a working example of frontier AI infrastructure completely outside Nvidia’s stack. Anthropic published results from Project Deal, a week-long experiment where Claude agents negotiated real trades between 69 employees in a private Slack marketplace — completing 186 deals worth over $4,000, with Opus agents consistently getting better prices than Haiku while users couldn’t tell the difference. Plus, Google announced a new investment of up to $40 billion in Anthropic at a $350 billion valuation — and a community workflow from a reader in New York who built a tick-detection app using his phone camera that scans his body for ticks and generates a PDF health report, all running locally with no data leaving his device.