Claude Opus 4 (x)

Shipped by Anthropic · May 22, 2025 · class: frontier-llm

Opus 4-era messaging stressed difficult professional tasks—multi-file refactors, extended reasoning under constraints, and calibrated uncertainty—rather than viral chat demos. Anthropic’s comparative charts claimed leadership pockets versus contemporaneous GPT and Gemini classes; independent eval shops found task-dependent splits.

In the months after, the defensible synthesis was not unambiguous dominance but credible top-tier placement: Opus-class models became one of a small set vendors anchor pricing and trust arguments on, especially where buyers pay for lower incident rates more than for marginal trivia gains.

Tracked claims about this model

• AI will affect almost 40 percent of jobs around the world, replacing some and complementing others. [open]
• cancer is cured, the economy grows 10% a year, the budget is balanced—and 20% of people don't have j… [refuted]