Anthropic bakes a steep discount into Sonnet 5 to sell more API calls before the IPO

Anthropic launched Sonnet 5, the middle model in its latest lineup, at a price well below GPT-5 and Claude Opus. The company is pricing it to move volume — and the discounts are real, not a marketing trick.

The move is part of a broader strategy. Anthropic is racing toward a blockbuster IPO, and it needs to show investors it can capture enterprise spend before the window closes. Sonnet 5 is the workhorse model — fast enough for production, cheap enough to use in bulk, and good enough that most shops won't feel the gap versus the pricier options. That's the kind of model that sits in the background of a thousand applications, doing the heavy lifting.

Why this matters for us: the more these models get priced down, the more small shops — the plumbers, the bodegas, the side hustles — can afford to put AI to work without hiring a data scientist.