Claude Fable 5.1 & GPT-6 Astra packages are live

test-strategy

Testing

Deciding what to test and at which level — the shape of a suite, what to do with legacy code, and the signals that a strategy is failing.

Choose your model

Available for 11 model families. The engineering substance is the same in each; the structure, checklist phrasing and constraint ordering are tuned per family.