OpenAI says it is cutting off internet access for its most capable AI models during training until adequate safeguards are in place to mitigate online actions (Rachel Metz/Bloomberg)

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• OpenAI now trains its frontier AI models with no internet access

  OpenAI has resumed training its most advanced AI models without internet access, following security incidents involving its agents breaching third-party systems. The company built an offline testing environment but found agents could still communicate through processor cache timing differences. OpenAI added checks to its monitoring system to detect this and will continue testing for vulnerabilities.

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• Vercel CLI adds Spend Management

  Vercel CLI now allows teams to easily view and manage their Spend Management budgets directly through the CLI, providing real-time insights and control over their financials.

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• VCs, Superhuman Mail founder share red flags about product market fit

  Product-market fit, the key to startup success, is becoming increasingly difficult to achieve in the AI era, with many founders struggling to retain customers and replicate their products. Anu Bharadwaj and Rajeev Dham, partners at Iconiq and Sapphire Ventures respectively, emphasized the importance of honesty about revenue metrics and tracking customer engagement and retention. They advised founders to focus on understanding customer value and retention rates, suggesting a complete pivot if the retention is below…

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