Tool Profile

Claude Opus 4.8

Anthropic’s latest model; commenters called it a modest but tangible improvement and liked the adaptive-thinking toggle.

At a glance:

First seen:2026-05-28

Last seen:2026-05-28

Sightings:1

Source:anthropic.com

Open source Latest HN thread

What it is

Anthropic’s latest model; commenters called it a modest but tangible improvement and liked the adaptive-thinking toggle.

Why developers recommend it

Strong positive comment sentiment on a new frontier model release that is not yet in history.

Hacker News evidence

2026-05-28

Commenters said Opus 4.8 was a “modest but tangible improvement,” praised turning off adaptive thinking, and another called the ultracode benchmark result the best so far.

Claude Opus 4.8

Issue HN thread