Claude's lead in LLM popularity narrowed after two security incidents exposed internal files and source code, dropping 5 points to 85%. Mistral posted the biggest weekly gain, up 6 points following its first owned data center announcement. Grok fell 6 points amid reports of mandated enterprise subscriptions, raising questions about what constitutes genuine adoption versus contractual requirements in AI procurement.

Claude Drops 5 Points, Mistral Surges in LLM Meter Update
Claude drops 5 points to 85% after two security breaches. Mistral posts biggest gain with first owned data center. Grok falls 6 as banks are forced to buy subscriptions for SpaceX IPO access. The widest weekly swing since the meter launched.