> Agents do best when they remember what they’ve done

Sometimes I am baffled that sentences like this are used as headlines. I know I’ll sound dismissive… but: duh?!

I think this blog post might be a "reply" of sorts to Anthropic's tweet from some days earlier?

> On ARC-AGI-3, an evaluation where AI models must solve novel problems, Opus 5’s score is three times as high as the next best model.

https://x.com/claudeai/status/2080699504576045299

So is this how Opus 5 ran it?

https://arcprize.org/results/anthropic-claude-opus-5

On one hand I agree with ARC team that harnesses can incorporate some logic and overfit to win the tests. But also, the specific harness that OpenAI wants to use is not cherry picked. What then should be the rules? Same harness for all or company’s standard commercial harness? Technically even that could incorporate some hacks.