Anthropic built an internal AI tool that took four hours and $200 a run, then shelved it. Weeks ago a newer model with none of that engineering beat it anyway.
Mike Krieger, who ran product at Anthropic until January and now builds in its Labs team, at Dreamforce this week:
"I built this product internally, it's called Hatch."
"And it was an end-to-end software builder. So you would give it a problem statement like, I want a mobile application. Maybe that helps me meditate more often."
The design was elaborate. Two models working against each other, one building and one attacking the result:
"where a builder would build, and then the adversary would say, I'm going to critique it. And then it would go back and forth and do this."
"It would take four hours, and it would validate, and verify, and click around, and then it would give you a finished product and be like, cool."
"Cost you $200 in tokens, but the end result was really, really good."
It worked. They shipped none of it:
"And we ultimately ended up not shipping it."
Then came the retest:
"I tried the same approach on our more recent models a couple of weeks ago."
"And without any of that scaffolding, it outperformed, which means that that product, had we shipped it, would have basically been obsoleted by just model capability progression."
He draws the general lesson from it:
"thinking about what are the ways in which my product is no longer going to be necessary or useful as these things progress."
"It takes some humility of saying, I might be working on something that's going away pretty soon."
Worth stating plainly: the "more recent models" that won are Anthropic's own, and this is his account of his own team's retest, not an independent benchmark.
A lot of enterprise AI budget is going into exactly this kind of scaffolding. Krieger's test is one any team can run before the next model lands: take the harness off, give the bare model the same task, and see what you are paying for.
- Mike Krieger (
@mikeyk), Anthropic Labs, with TIME's Sam Jacobs at Dreamforce 2026.