Anthropic releases Haiku 5.5 for fast, high-volume tasks
The small model adds adjustable effort, with summaries, classification and coding subagent work among its intended uses.
THE STORY IN THREE POINTS
- Haiku 5.5 was announced on October 7.
- It is the first Haiku-class model with adjustable effort.
- Anthropic positions it for repetitive and time-sensitive workloads.
The model launch
Anthropic introduced Claude Haiku 5.5 for high-volume, cost-sensitive tasks, including summaries, database queries and classification. The company also describes it as a possible coding subagent alongside larger Claude models.
Haiku 5.5 adds an adjustable effort setting, a first for the Haiku line. Anthropic calls it its fastest small model and says average running costs are lower than Haiku 4.5; these are vendor claims.
Editorial context: small jobs still need acceptance rules
A classification workflow could measure whether the model sends each request to the correct destination, including unusual cases that should be escalated. An error that silently enters another process may cost more than the original inference.
For coding subagents, the assignment should be narrow enough that another agent or person can verify the result. Listing the expected files, evidence and completion condition would make delegation easier to assess than asking for an open-ended improvement.
Editorial outlook: what to watch
The useful comparison is completed work at the required response time across different effort settings.
Teams should include difficult examples and correction time in the comparison. A smaller model earns its place when the whole process remains dependable, rather than simply producing a faster first response.
Sources: Anthropic: Introducing Claude Haiku 5.5 ↗
