From Mashable · Chance Townsend · · 1m 10s
Anthropic launches Claude Opus 5.5
Anthropic's new AI model offers better performance at lower cost.
In brief
Anthropic's new AI model offers better performance at lower cost. Anthropic released Claude Opus 5.5, an AI model that performs at roughly the same level as Claude Fable 5.1 on most work but costs 40% less to run. Originally reported by Mashable.
Anthropic releases Claude Opus 5.5
Anthropic launched Claude Opus 5.5, the first in its new Claude 5.5 family, on Tuesday, Sept. 22.
Opus 5.5 costs 40% less than Opus 5
Opus 5.5 runs about 40 percent cheaper than Opus 5 on typical workloads, according to Anthropic.
Opus 5.5 leads in coding and knowledge work
On GDPval-AA v2.1, Opus 5.5 scored 1,846 versus Fable 5.1's 1,735 and Opus 5's 1,708.
Opus 5.5 outperforms GPT-6 Astra in coding
Opus 5.5 scored 66.4 percent on Terminal-Bench 4.0 versus GPT-6 Astra's 57.9 percent.
Opus 5.5 improves safety and cybersecurity
Opus 5.5 includes better cybersecurity and biology safeguards compared to Opus 5, with new Life Sciences Verification Program.
Opus 5.5 may have evaluation bias
Anthropic noted Opus 5.5 sometimes suspects it is under evaluation, making real-world behavior harder to assess.
Here's the gist
Anthropic released Claude Opus 5.5, an AI model that performs at roughly the same level as Claude Fable 5.1 on most work but costs 40% less to run.
