From news to practice.
Before choosing a model, read how it has been evaluated and what limitations it declares. The product name alone does not reveal its capabilities.
The document behind the announcement
In Anthropic's system card catalogue, Claude Haiku 5.5 is listed as of October 2026, while Sonnet 5.5 and Opus 5.5 appear from September. The cards collect information on capabilities, safety assessments, and distribution decisions of the models. They are producer documents and should be read as such.
One version is not enough to choose
The commercial name alone does not describe how a system behaves in a specific task. To compare different tools, it is best to start from the task, the allowed documents, data sensitivity, and necessary checks. Even an assessment published by the supplier does not replace an independent test for one's own use case.
Three questions before adoption
What errors would make the result unusable? Who controls the output? What actions require approval? A considered selection must answer these questions before entrusting relevant processes to the model. Here, we do not attribute performance, prices, or comparative advantages that have not been verified through dedicated testing.
Sources and documents
Document date or reference period: October 2026 · Anthropic catalogue.
Text prepared with AI assistance based on the indicated sources. Interpretive evaluations are distinct from data and statements from sources.
