Sources: in a London presentation, SpaceXAI says Grok Bot hit 418,000 users as of September 14, up 24% from the week prior; SpaceXAI launched it in mid-August (Edward Ludlow/Bloomberg)

SpaceXAI announced that its Grok Bot reached 418,000 users on September 14, up 24% from the previous week, after launching in mid-August. Anthropic released Claude Opus 5.5, which matches Claude Fable 5.1 on most tasks while costing about 40% less to run; the model charges $4 per million input tokens and $20 per million output tokens. Apple is developing a screenless health-and-fitness tracker similar to Whoop, while Microsoft cut 268 Xbox staff, and Shopify will let Meta’s Muse complete purchases via its one-tap checkout.