# @timfduffy — 2026-10-07

♥488 ↻21 · https://x.com/timfduffy/status/2107943190968013241

On the Anthropic ECI, Haiku 5.5 scores marginally higher than Mythos preview, which was made available to Project Glasswing partners six months ago today. https://t.co/G2OMFW0CNk

![photo](../../../media/HUDqEUWawAAq-jR.jpg)
tags: author:timfduffy, has-image, kind:image, kind:tweet, model:mythos, on:claude-haiku-5-5, year:2026
cited on: _dossiers/claude-haiku-5-5.md, claude-haiku-5-5