Theo Browne evaluates Fable 5.1 through real repository work rather than a short demo. Across many pull requests, he sees the model inspect code, choose tools and carry tasks through with fewer reminders than earlier systems.
The improvement is not limited to raw code generation. Browne finds stronger design judgment, better awareness of project context and a greater ability to locate useful work independently before implementing and merging a fix.
He cautions that this competence can consume usage limits faster because the model attempts more substantial work. Even so, the extra spend can be worthwhile when the result replaces manual review and repeated prompting. The sponsor segment is omitted.
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