AI Weekly Briefing: AI’s New Power Shift

This week on The AI Breakdown, the Pentagon has awarded classified AI contracts to eight companies, but Anthropic is notably missing from the list after being labelled a supply chain risk. Meanwhile, OpenAI has ended its Azure-only era, with GPT models now arriving on AWS Bedrock almost immediately after a reworked Microsoft agreement. We also dig into Alphabet, Microsoft, Amazon and Meta signalling roughly $700 billion in AI infrastructure spend, why that may ease compute scarcity, and how custom silicon from Trainium to TPUs could reshape the economics of model hosting.  Beyond the top stories, you’ll hear why Mistral Workflows matters for European enterprise AI, what Ineffable Intelligence’s $1.1 billion seed round says about the market’s growing appetite for post-LLM bets, and the practical implications of the EU AI Act deadline, Claude Security, Meta’s 10 million weekly Business AI chats, xAI’s cheaper Grok 4.3 API, and Otter’s move into MCP-led enterprise search.