METR on X: “We ran GPT-5.4 (xhigh) on our tasks. Its time-horizon depends greatly …” | PeekX

Skip to content

Viewer Video downloader Blog

A fast, private reader for public X posts. No account, no tracking, no pop-ups.

Viewer

X / Twitter viewer View without an account Profile viewer Media viewer Reply viewer Thread reader Nitter alternative Bookmarklet

Download

Video downloader Twitter to MP4 Twitter to MP3 Image downloader GIF downloader

About

How it works Blog Privacy Terms Copyright / DMCA

Language:English Español Português 日本語

PeekX is an independent tool and is not affiliated with, endorsed by or sponsored by X Corp. “X” and “Twitter” are trademarks of their respective owners. We only show posts that their authors made public and never access private or protected accounts. Downloaded media belongs to its creators — please respect their rights.

METR on X: “We ran GPT-5.4 (xhigh) on our tasks. Its time-horizon depends greatly …” | PeekX

Username or post link

Home / @METR_Evals / Post

@METR_Evals

We ran GPT-5.4 (xhigh) on our tasks. Its time-horizon depends greatly on our treatment of reward hacks: the point estimate would be 5.7hrs (95% CI of 3hrs to 13.5hrs) under our standard methodology, but 13hrs (95% CI of 5hrs to 74hrs) if we allow reward hacks.

Apr 10, 2026, 4:27 PM UTC

36 771

More from @METR_Evals

Download media

Every quality X serves, straight from X's media CDN. No watermark, no wait.

OriginalBEST

Photo · 1568×933

Save & share

Turn this post into a clean image, or copy it as text or Markdown.