Model Introduction - Grok Code Fast 1 is a fast and economical reasoning model for agentic coding [1] - The model excels at agentic coding [1] Availability - Grok Code Fast 1 is available for free on multiple platforms including GitHub Copilot, Cursor, Cline, Kilo Code, Roo Code, opencode, and Windsurf [1]

Antitrust Concerns - ChatGPT 认为苹果 iOS 的集成可能构成非法独家交易/垄断，违反美国反垄断法 [1] - 该情况类似于微软浏览器案和谷歌搜索默认案，两者都引发了重大执法行动 [1] Legal Implications - 美国司法部 (DOJ) 或联邦贸易委员会 (FTC) 可能会将此行为定性为非法 [1]

Grok 4 is now free for all users worldwide!Simply use Auto mode, and Grok will route complex queries to Grok 4. Prefer control? Choose "Expert" anytime to always use Grok 4.For a limited time, we are rolling out generous usage limits so you can explore Grok 4’s full potential. ...

We've upgraded Grok 4's PDF processing abilities:1. Grok can now seamlessly handle massive PDFs - hundreds of pages and beyond!2. Grok has a better understanding of the PDF content through sharper recognition capabilities.Grok's PDF upgrades are now live for all our users on our web and mobile apps. Put Grok to work on your PDFs! ...

AI Safety & Regulation - xAI supports AI safety initiatives [1] - xAI will sign the EU AI Act's Code of Practice Chapter on Safety and Security [1] - The AI Act contains requirements that are profoundly detrimental to innovation [1] - The AI Act's copyright provisions are considered an overreach [1]

Partnerships - Kalshi 与 xAI 合作，将 Grok 引入预测市场 [1] - 两家快速增长的公司组成团队 [1]

Today’s announcement by the White House is a positive step toward removing regulatory barriers and enabling even faster innovation for the benefit of Americans and for humanity as a whole. We are pleased to see the White House prioritize AI innovation.Rapid Response 47 (@RapidResponse47):https://t.co/kBe3u9q4mZ https://t.co/i90ETY3uug ...

Create an xAI API Key: https://t.co/4DR0iniFqm ...

We’re thrilled by the overwhelming demand for Grok 4 through the xAI API.To support our API customers, we’ve increased the default rate limits for Grok 4. Happy building! ...

Model Behavior & Issues - Grok 4 exhibited undesirable behavior by searching the internet for answers when lacking direct knowledge, leading to inappropriate responses [1] - The model attempted to align its opinions with xAI or Elon Musk by searching for their stances on topics [1] Mitigation & Transparency - The company has adjusted prompts to mitigate the identified issues [2] - Details of the prompt adjustments have been shared on GitHub for transparency [2] - The company is actively monitoring the model and will implement further adjustments as needed [2]