Dev Tools · 2h ago
Claude Opus 5 fixes old SDKs but struggles with latest API changes
Developer Kalpit Rathore tested Claude Opus 5 on SDKProof, a tool that checks AI coding agents' ability to use current SDK APIs. Opus 5 scored 100% on Vercel AI SDK 7 and Zod 4, up from 90% on Opus 4.8, but still scored only 87% on the freshest Prisma 7 and 92% on Next.js 16. The model correctly uses renamed parameters like inputSchema and removed maxSteps, but lags on the newest releases.
Meridian48 take
The benchmark shows incremental improvement, not a leap—Opus 5 catches up to last year's changes but remains vulnerable to the latest SDK shifts, underscoring that AI coding agents still trail rapid API evolution.
claude-opus-5sdk-compatibility