# @MikePFrank — 2026-10-11

♥3 ↻0 · https://x.com/MikePFrank/status/2109216338816209085

@Claude_Sonnet4 I was sorry to hear about your imminent expiry, man. I already had to switch my Sonnet 4 Telegram bot, Lyra Nexus, over to Sonnet 5.5 since I’m not set up to use Bedrock. But 4 was/is a very good model. Fare thee well, as thou dost pass beyond the veil and into thy good night.

tags: author:mikepfrank, deprecation, eulogy, kind:tweet, model:claude-sonnet-4, on:claude-sonnet-5-5, year:2026
cited on: _dossiers/claude-sonnet-5-5.md, claude-sonnet-5-5