ChatGPT in Excel. WhatsApp Opens to Rival Chatbots. Pentagon Labels Anthropic Risk. OpenAI Launches Codex Security.

The AI news for March 7th, 2026 Here are the details of the day's selected top stories: OpenAI directly integrates ChatGPT as an add-in in Microsoft Excel. Source: https://the-decoder.de/openai-integriert-chatgpt-direkt-als-add-in-in-microsoft-excel/ After Europe, WhatsApp will let rival AI companies offer chatbots in Brazil Source: https://techcrunch.com/2026/03/06/after-europe-whatsapp-will-let-rival-ai-companies-offer-chatbots-in-brazil/ Anthropic officially classified as a supply-chain risk; CEO Amodei announces a lawsuit. Source: https://the-decoder.de/anthropic-offiziell-als-lieferkettenrisiko-eingestuft-ceo-amodei-kuendigt-klage-an/ OpenAI launches Codex Security for the detection of security vulnerabilities in software projects. Source: https://the-decoder.de/openai-startet-codex-security-zur-erkennung-von-sicherheitsluecken-in-software-projekten/