📄 中文摘要
2026年2月27日，OpenAI完成了历史上最大的一轮私人融资，金额达到1100亿美元，由亚马逊和英伟达主导，软银也参与其中。此轮融资使OpenAI的估值达到7300亿美元，超越了大多数财富50强公司。此外，美国政府开始取消Anthropic的联邦合同，GPT-5.4发布，具备百万令牌的上下文窗口。Block裁员40%，Karpathy开源了一款自主研究代理，整个行业在短短12天内发生了巨变。
震撼 AI 的 12 天：2026 年 2 月 26 日至 3 月 9 日发生的一切
出处: 12 Days That Shook AI: Everything That Happened Feb 26 – Mar 9, 2026
发布: 2026年3月9日
📄 English Summary
12 Days That Shook AI: Everything That Happened Feb 26 – Mar 9, 2026
On February 27, 2026, OpenAI closed the largest private funding round in history, raising $110 billion, led by Amazon and Nvidia, with participation from SoftBank. This round brought OpenAI's pre-money valuation to $730 billion, surpassing most Fortune 50 companies. Additionally, the US government began terminating federal contracts with Anthropic, and GPT-5.4 was released with a million-token context window. Block laid off 40% of its workforce, and Karpathy open-sourced an autonomous research agent, marking significant changes in the industry over just twelve days.