1.28.0 (2026-02-20) Features core: add Claude Opus 4.6 and Sonnet 4.6 to available models (#2439) (b421a94) Bug Fixes api: resolve opaque OAuth tokens via userinfo endpoint (#2440) (2380f0c) Miscellaneous Chores deps: bump @tambo-ai/typescript-sdk from 0.91.0 to 0.92.0 in the tambo-ai group (#2337) (97dcd7d) deps: bump the small-safe-packages group across 1 directory with 4 updates (#2423) (48a3aed)