Anthropic launches cheaper Claude Opus 5.5
Anthropic launched Claude Opus 5.5 on Sept. 22, saying it matches Fable 5.1 on most work and costs 40%1 less to run than Opus 5.
Why it mattersEnterprise teams should test the claimed 40%1 running-cost reduction on their own agent workloads before revising inference budgets.
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