September 23rd, Anthropic 22nd Claude Opus 5.5, this is Claude 5.5ModelI don't know. Officially, the new model reaches the level of Claude Fable 5.1 in most of its work, and the cost of processing typical loads under conventional settings is 40% lower than Opus 5 and output speeds above 30%。
Opus 5.5 Input, output and cache reading prices per 1 million Token are $4, $20 and $0.2 respectively. In the case disclosed by Anthropic, the early tester used it to complete a 680,000 line code migration within less than one day; in a web-based optimisation test, the model was successful 39 times in 40 attempts。
This is the first time that Anthropic has published a public call to slow the forward model. The model was evaluated by external institutions such as Frontier Design and METR, using biosafety and cybersecurity protection similar to Claude Fable 5.1. Claude Sonet 5.5 and Haiku 5.5 will be launched in the coming weeks。