Harmonic Aristotle
Hacker ApprovedShares rank 2 of 3 math reasoning models by recommenders
Recommended for math proofs whose answers are checked in Lean, so people can trust the results. It is used to formalize theorems and proofs from papers.
Recommended for math proofs whose answers are checked in Lean, so people can trust the results. It is used to formalize theorems and proofs from papers.
12 people gave an opinion
- recommend it
- 10
- criticize it
- 2
- approval share
- 83%
Recommended in 4 of 13 months
- November 2025: not recommended
- December 2025: recommended
- January 2026: recommended
- February 2026: not recommended
- March 2026: not recommended
- April 2026: not recommended
- May 2026: recommended
- June 2026: not recommended
- July 2026: recommended
- August 2026: not recommended
- September 2026: not recommended
- October 2026: not recommended
- November 2026: not recommended (month in progress)
Why it carries the badge
- 10 people recommend itNeeds 10 or more, met.
- 5 recommenders for every criticNeeds 2 to 1 or better, met.
- Recommended in 4 of 13 monthsNeeds 4 or more, met.
The same three rules apply to every product, and the badge can’t be bought. How the badge works
What people say about it
The reasons people give, with the number of comments that give each one. Open a reason to read what they said.
Why people recommend it
Each mark is one comment
Outputs checked in Lean
“Aristotle's output is formally verified in Lean, so you can run it for days on a hard problem and be assured that the answer is right”
Comment from 10 Jan 2026 in “AI solves Erdos problem #728 (Terence Tao mathstodon post)” “there is no doubt that the proof is correct”
Comment from 10 Jan 2026 in “AI solves Erdos problem #728 (Terence Tao mathstodon post)” Strong at formalizing proofs
“I recommend trying Aristotle for yourself to see how reliably it can formalize these theorems”
Comment from 10 Jan 2026 in “AI solves Erdos problem #728 (Terence Tao mathstodon post)” “Codex formalizes much better than any tool with exception of Aristotle from Harmonic.”
Comment from 9 May 2026 in “A recent experience with ChatGPT 5.5 Pro” “recently opened a public API that got 10/12 problems on this year's Putnam exam”
Comment from 17 Dec 2025 in “AI will make formal verification go mainstream” - Comment from 15 Jul 2026 in “Solving 20 Erdős Problems with 20 Codex Accounts Running in Parallel”
Essential to others' research
“Aristotle ( https://arxiv.org/abs/2510.01346 ) is key here folks.”
Comment from 9 Jan 2026 in “AI solves Erdos problem #728 (Terence Tao mathstodon post)” “Aristotle ( https://arxiv.org/abs/2510.01346 ) is key here folks”
Comment from 9 Jan 2026 in “AI solves Erdos problem #728 (Terence Tao mathstodon post)” “It could not be done without Aristotle”
Comment from 9 Jan 2026 in “AI solves Erdos problem #728 (Terence Tao mathstodon post)” Impressive power people underestimate
“people - even here, of all places - keep underestimating just how much power there is in that”
Comment from 10 Jan 2026 in “AI solves Erdos problem #728 (Terence Tao mathstodon post)” “This deserves a HN thread in its own right!”
Comment from 10 Jan 2026 in “AI solves Erdos problem #728 (Terence Tao mathstodon post)”
Other math reasoning models people recommend
The two most recommended other math reasoning models, with the same counts for each, so you can compare like for like. The tick on each bar marks the 2 to 1 line the badge needs.
| Product | Recommend | Criticize | Approval | Months | Owned | Badge |
|---|---|---|---|---|---|---|
| Leanstral by Mistral | 15 | 12 | 56% | 2 | — | — |
| Harmonic AristotleThis page | 10 | 2 | 83% | 4 | — | Approved |
| DeepSeekMath-V2 | 10 | 6 | 63% | 6 | — | — |
What people said
15 of the 18 comments that mention it, newest first. Each links to the original comment.
“you could formalize a proof from only the text of a paper”
“There's no reason Aristotle or Veratad should see who the underlying requestor is.”
“I am trying to avoid this by building a plugin based on my memory management project Aristotle.”
“Codex formalizes much better than any tool with exception of Aristotle from Harmonic.”
“Just see how Aristotle has been successful at math, and it could be applied to coding too”
“It took me a minute or two of clicking around to figure out”
“Aristotle's output is formally verified in Lean, so you can run it for days on a hard problem and be assured that the answer is right”
“I recommend trying Aristotle for yourself to see how reliably it can formalize these theorems”
“there is no doubt that the proof is correct”
“people - even here, of all places - keep underestimating just how much power there is in that”
“This deserves a HN thread in its own right!”
“It could not be done without Aristotle”
“Aristotle ( https://arxiv.org/abs/2510.01346 ) is key here folks.”
“Aristotle ( https://arxiv.org/abs/2510.01346 ) is key here folks”
“recently opened a public API that got 10/12 problems on this year's Putnam exam”
Counts come from 1,795,640 Hacker News comments, November 2025 to November 2026. How we count. Report a mistake.