Stevie Bonifield is a news writer covering all things consumer tech. 1, address criticisms from customers about price, data retention, and overzealous safeguards.

1 offers stronger performance than Fable 5, but costs around 25 percent less typically and up to 45 percent less for complex agentic tasks, thanks to reduced pricing on cached data that was already processed and stored. Along with the announcement, a slew of early impressions popped up, including from Every CEO Dan Shipper, who claims, “It’s the strongest coding model we’ve used, but now it’s fast, token-efficient, and crucially actually speaks like a normal person.”

1 picked up on subtleties and ambiguities in data that Fable 5 missed in the same test. 1 with low reasoning scores the same as its predecessor set to Max reasoning.

1 has the same biology restrictions as the previous model. Anthropic also explained its progress on data retention, saying that Enterprise Frontier Safeguards offer “complete privacy” by storing data on the customer’s cloud servers instead of its own, and will start rolling out later this fall.

1 to be used for identifying software vulnerabilities,” but it will still redirect some cybersecurity tasks to Opus models, like “penetration testing, exploit generation, and binary-based vulnerability scanning.” 1 is available to Project Glasswing participants only.

Follow topics and authors from this story to see more like this in your personalized homepage feed and to receive email updates.