Claude Opus 5 closed last year's SDK gaps — not this year's
Claude Opus 5 came out today. so I re-ran the whole board on it. short version: it fixed last year's SDKs. it did not fix this year's. The two that jumped: Vercel AI SDK 7 and Zod 4 were both 90 on the previous model (Opus 4.8). What flipped Here's the kind of thing that changed.
- ▪Claude Opus 5 came out today. so I re-ran the whole board on it. short version: it fixed last year's SDKs. it did not fix this year's.
- ▪The two that jumped: Vercel AI SDK 7 and Zod 4 were both 90 on the previous model (Opus 4.8).
- ▪What flipped Here's the kind of thing that changed.
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try { if(localStorage) { let currentUser = localStorage.getItem('current_user'); if (currentUser) { currentUser = JSON.parse(currentUser); if (currentUser.id === 502197) { document.getElementById('article-show-container').classList.add('current-user-is-article-author'); } } } } catch (e) { console.error(e); } Kalpit Rathore Posted on Jul 26 Claude Opus 5 closed last year's SDK gaps — not this year's #ai #typescript #opensource #webdev A while back I built a small tool called SDKProof. it checks how well an AI coding agent writes an SDK's current API — the stuff that changed in the last major, that the model tends to get wrong because it learned the old version. Claude Opus 5 came out today. so I re-ran the whole board on it. short version: it fixed last year's SDKs.
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