Anthropic's Claude Sonnet 5 Puts Near-Opus Agents in the Cheap Seats
From the article
Claude Sonnet 5 is Anthropic's midsize model, released June 30, 2026. It scores 63.2% on SWE-bench Pro — near Opus 4.8's 69.2% — at $2 per million input tokens, 40% of the flagship's price. Now the default for free and Pro.
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