/AI2h ago

Opus 4.8 Outperforms GPT-5.5 by Nearly 13 Points on PostTrainBench

15407113326K
Original post
Lisan al Gaib@scaling01#975inAI

I know today is Mythos day but HOLY SHIT

Opus 4.8 just destroyed GPT-5.5 on PostTrainBench scoring almost 10% higher

12:19 PM · Jun 9, 2026 · 15.2K Views
Sentiment

Users expressed strong approval of Anthropic Opus 4.8 outperforming GPT-5.5 on PostTrainBench because they agree with the impressive benchmark results.

Pos
100.0%
Neg
0.0%
1 comments with sentiment.
Cluster Engagement
Posts from X
Most Activity
Most Activity
VIEWS8.4KBOOKMARKS15LIKES210RETWEETS6REPLIES6
Lisan al Gaib@scaling01

Yeah, Anthropic is going to build ASI first

Lisan al Gaib@scaling01

I know today is Mythos day but HOLY SHIT

Opus 4.8 just destroyed GPT-5.5 on PostTrainBench scoring almost 10% higher

2hViews 8.4KLikes 210Bookmarks 15
Lisan al Gaib@scaling01

https://posttrainbench.com/

Lisan al Gaib@scaling01

I know today is Mythos day but HOLY SHIT

Opus 4.8 just destroyed GPT-5.5 on PostTrainBench scoring almost 10% higher

2hViews 2.4KLikes 7Bookmarks 0
Jeremy Mcnabb@Jeremy_AI_

@scaling01 Nothing is destroyed against the next

Love is Love

“All tread carefully”

Just in case forbidden from love

“I cannot comprehend this abyss”

Love is Love

No data suggests that love is ***nice**^

Kindness is all

❤️

2hViews 91
newaicourses@newaicourses

@scaling01 Anthropic is something indeed

2hViews 20
Rugbist@rugbist_

@scaling01 based on what exactly? opus jumping up in one benchmark is cool but ASI is a different planet entirely

2h