Opus 5 and Opus 4.8 share a $5/$25 rate card, yet Opus 5 billed 3.1x more on identical tasks out of the box. Where it goes, and the switch that closes it.

xAI says Grok 4.5 matches Claude Opus 4.8 on coding for a fraction of the tokens. A hands-on test put real numbers on it. Here's what the token-cost gap means for developers…

Anthropic's new everyday model Claude Opus 5 undercuts its own frontier product on cost and beats it almost everywhere that counts.