tech

February 18, 2026

Vibe Check: Anthropic Just Made Opus Cheaper Without Calling It That

Sonnet 4.6 delivers Opus-close performance at half the price—but speed didn't come along for the ride

Vibe Check: Anthropic Just Made Opus Cheaper Without Calling It That

TL;DR

  • Sonnet 4.6 is positioned as a cheaper alternative to Opus, with API costs roughly halved.
  • The model demonstrates intelligence comparable to Opus on tasks like coding, brainstorming, and complex data restructuring.
  • Despite performance parity in intelligence, Sonnet 4.6 does not offer noticeable speed improvements over previous versions.
  • The model showed some erratic behavior, such as starting a task prematurely or struggling with specific configuration issues where Opus succeeded.
  • Sonnet 4.6 is recommended for developers building AI-powered products who found Opus too expensive, while existing Opus users for complex work may not need to switch.

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