Anthropic today launched Claude Opus 5.5, which it says is the first model in a new family of 5.5 models. Opus 5.5 performs at the level of Claude Fable 5.1 on most jobs, but costs 40% less to run than Opus 5.
According to Anthropic, Opus 5.5 represents a “major advancement” over Opus 5 with improvements in performance and security. Opus 5.5 is comparable to Mythos 5.1 in biology and cybersecurity, Anthropic is therefore launching it with guarantees similar to those of Fable 5.1. Opus 5.5 also generates over 30% faster output than Opus 5.
On criteria shared by Anthropic, Opus 5.5 outperformed Fable 5.1 in agent coding, knowledge work, computer use, visual graphics recognition, and multidisciplinary reasoning. Anthropic says the model communicates more naturally than previous models, placing important information at the beginning of a response so it’s easier to understand at a glance. He is less likely to use jargon or idiosyncratic expressions, and he follows the writing rules given to him.
Claude Opus 5.5 is available on all platforms today. With the launch of Opus 5.5, Anthropic is increasing usage limits by five hours on the seat-based Pro, Max, Team, and Enterprise plans. Subscribers also received a rate limit reset that can be used at any time between now and October 22.
Popular stories
Claude from Anthropic is coming to CarPlay
Anthropic has added CarPlay integration to the Claude iOS app, meaning Claude users can talk to Claude through their in-car infotainment systems. Apple added support for third-party chatbots in CarPlay in iOS 26.4. Chatbot apps with CarPlay integration must add support for a voice control screen, use Apple’s designated CarPlay model, and obtain entitlement from Apple. Claude can answer…
Anthropic launches Claude Fable 5.1 with lower costs and fewer false positives
Anthropic today introduced Claude Fable 5.1 and Claude Mythos 5.1, which the company says are “the world’s most advanced models for coding and knowledge work.” According to Anthropic, Claude Fable 5.1 sets a new standard for coding, knowledge work, and long-form problem-solving tasks. It achieves similar or better results than Fable 5 with low or medium effort, and has much better results…
Siri AI settlement website now live: Apple to pay some iPhone owners
In May, Apple agreed to pay $250 million to settle a class-action lawsuit in the United States over the delayed launch of Siri AI, and the settlement website is now live. Apple will pay approximately $25 per eligible iPhone to eligible customers, who can submit a claim through the settlement website between September 21 and December 21 of this year. The exact payment may be more or less than $25 depending on…
