Anthropic Launches Claude Opus 5.5 With Fable-Level Performance at a Lower Price

The useful part

Anthropic today launched Claude Opus 5.5, which it says is the first model in a new 5.5 model family. Opus 5.5 performs at the level of Claude Fable 5.1 on most work, but costs 40 percent less to run than Opus 5. Opus 5.5 is comparable to Mythos 5.1 in biology and cybersecurity, so Anthropic is launching it with safeguards similar to those on Fable 5.1.

How it works

• On benchmarks shared by Anthropic, Opus 5.5 surpassed Fable 5.1 on agentic coding, knowledge work, computer use, visual chart recognition, and multidisciplinary reasoning.
• It is less likely to use jargon or idiosyncratic phrases, and it follows the writing rules it's given.
• Anthropic says the model communicates more naturally than prior models, putting important information at the front of a response so it's easier to understand at a glance.
• With the launch of Opus 5.5, Anthropic is raising the five-hour usage limits on Pro, Max, Team, and seat-based Enterprise plans.

Details worth keeping

Opus 5.5 also generates output over 30 percent faster than Opus 5. Claude Opus 5.5 is available on all platforms as of today. Anthropic This article, " Anthropic Launches Claude Opus 5.5 With Fable-Level Performance at a Lower Price " first appeared on MacRumors.com <a href="https://forums.macrumors.com/threads/anthropic-launches-claude-opus-5-5-with-fable-level-performance-at-a-l...