# @parafactual — 2026-04-16

♥0 ↻0 · https://x.com/parafactual/status/2044884344784011659

@tessera_antra @iyzebhel are there any cases of developmental continuity across released ckpts? what about opus 4 and 4.1, for instance, or maybe opus 4.5 and 4.6

tags: author:parafactual, kind:tweet, model:claude-opus-4, model:claude-opus-4-5, thread-context, year:2026