Opus 4.8 doesn’t feel like a big upgrade from Opus 4.7.
Meanwhile, GPT-5.4 to GPT-5.5 felt like an actual jump. Now I’m really curious what 5.6 looks like.
Is Anthropic saving Mythos for the IPO or what?
9:08 PM · Jun 2, 2026 · 16K Views
Databricks' Yuchen Jin says GPT-5.5 shows a major performance leap while Claude Opus 4.8 barely improves on 4.7
Jin speculates Anthropic is withholding Mythos for an IPO.
--0--
Sentiment
Sentiment building, check back later.
Cluster Engagement
-
Views
-
Comments
-
Reposts
-
Bookmarks
Expand data
Posts from X
Most Activity
Most ActivityTimeline
VIEWS3.6KLIKES70
Andrew Curran@AndrewCurran_
@Yuchenj_UW June 16th.
Yuchen Jin@Yuchenj_UW
Opus 4.8 doesn’t feel like a big upgrade from Opus 4.7.
Meanwhile, GPT-5.4 to GPT-5.5 felt like an actual jump. Now I’m really curious what 5.6 looks like.
Is Anthropic saving Mythos for the IPO or what?
4hViews 3.6KLikes 70Bookmarks 2
BOOKMARKS4REPLIES8
Andrew Curran@AndrewCurran_
@Yuchenj_UW Mythos, I actually think 5.6 might be here a lot sooner, in fact in about 36 hours.
Yuchen Jin@Yuchenj_UW
@AndrewCurran_ 👀👀👀
Mythos or GPT-5.6??
4hViews 765Likes 33Bookmarks 4