Source-backed update · October 2026
Anthropic releases Claude Haiku 5.5
The new small model targets high-volume work and adds an adjustable effort setting.
What was announced
Anthropic released Haiku 5.5 on 7 October, with the model identifier claude-haiku-5-5. The announcement positions it for repetitive, high-volume tasks and describes an adjustable effort setting. It also reports a reduction in Sonnet 5.5 cache-read pricing and a monthly API credit for eligible Max and Team subscribers. Reported performance and typical cost savings come from Anthropic’s evaluations; they are not guarantees for a particular application. Check the current API pricing, credit eligibility and the exact workload before budgeting.
Before adopting it
Measure successful task cost, retries and latency on your own sample instead of selecting from a launch benchmark alone.