Claude Opus 4.8 shipped yesterday. The efficiency gains matter more than the leaderboard.
Anthropic released Claude Opus 4.8 on May 28. The headline benchmark is 88.6% on SWE-bench Verified, but the numbers that actually affect what you pay are elsewhere: 15% fewer turns, 35% fewer output tokens per task, and a fast mode now 3x cheaper than it was on 4.7.