Claude Opus 5 review: this model is brilliant (but annoying)

What changed. Claire Vo compared seven models across six practical tasks with blind scoring and reported that personality, verbosity, and willingness to act now shape model choice as much as raw intelligence.

Technique / discovery. Small, repeatable, blind task suite; hands-on workflow testing.

Why it matters. As frontier models cluster in capability, product fit, interaction style, and task-specific evaluation become differentiators.

Application. Model routing and product selection

Evidence maturity. Podcast (source tier B)

Identified bottleneck. Anecdotal sample, limited task set, and host-designed rubric.

Caveat / evidence note. Useful practitioner evidence, not a controlled research benchmark.

Review status. Reviewed. User requested: Yes.

• How I AI / Claire Vo (opens in a new tab)

A reproduction tutorial is not yet available for this entry. The closest reviewed material is Reliability, uncertainty, and evaluation and Language models and representation.