NewsAnthropic launches Claude Opus 5.5: Fable-level performance at $4/$20 per million tokensAnthropic's Claude Opus 5.5, the first Claude 5.5 model, claims Fable 5.1-level results on most work while costing about 40% less to run than Opus 5, as AI price cuts pile up.Lucas FerreiraSep 22, 20268 min