Claude Sonnet 5 Scores 63.2% on SWE-bench at 60% Less Cost — Anthropic IPO Strategy in Plain Sight
Anthropic released Claude Sonnet 5 on June 30 with near-flagship performance at mid-tier pricing. The model scores 63.2% on SWE-bench Pro approaching Opus 4.8 at 69.2% while costing roughly 60% less per token. The timing is not accidental. With a blockbuster IPO on the horizon Anthropic is compressing the price-performance gap to accelerate API adoption and grow the user base that justifies its valuation.