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Caltech Mathathon: Backlash Leads OpenAI to Pull Sponsorship

Caltech announced the first research-grade AI math hackathon backed by OpenAI and Anthropic; after nearly 500 mathematicians signed a protest letter, OpenAI withdrew its sponsorship on Sept 11.

2026-09-05 ~ 2026-09-11 · 4 episodes · 34 posts

Episode 1 · Caltech Hosts World's First AI Math Hackathon with Anthropic and OpenAI (2026-09-05, 23 posts)

Caltech announced the Mathathon for Oct 30–Nov 1, 2026, billed as the world's first research-level AI math hackathon, co-hosted by Anthropic and OpenAI and sponsored by roughly 30 organizations including DARPA expMath, Cognition, Cloudflare, Modal, Mercor, Prime Intellect, a16z and Y Combinator. Around 100 selected teams will solve, understand and present an open math problem over 40 hours, with over $2 million in compute credits and access to frontier models, ending with oral defenses before a panel of top mathematicians. Applications are now open. This is the first large-scale joint stress test of AI-assisted research-level mathematics by leading AI labs and a university.

Confirmed

  • The event runs three days: Friday workshop on AI agents hosted by Anthropic; hackathon-style problem solving Saturday and Sunday; oral presentations and defense before expert judges Sunday evening.
  • Participants include IMO/IOI medalists (organizer sathvikr says the pool includes 10 medalists) and Annals-level mathematicians; about 100 teams are recruited globally.
  • Prizes come in two waves: initial awards from judges for the most promising teams, with a second wave in early 2027.
  • The main track—solving and explaining an open math problem—is judged by independent academics with no sponsor involvement; sponsors run separate tracks with pre-set problems ranging from number-field sieve algorithm improvements to superalignment.
  • The organizers stress three principles: fairness (admission by math ability, travel covered), transparency (all AI conversation logs recorded and open-sourced), and understanding (teams must orally present and answer judges' questions).
  • Per sathvikr, organizers also plan a lasting responsible-use policy beyond the hackathon: convening pro-AI and anti-AI mathematicians to talk openly and co-design the rules.

Why it matters

  • Leading AI labs are joining a university for the first time to throw frontier models at open math problems at scale—a concentrated stress test of AI-assisted research-level mathematics.
  • Full recording and open-sourcing of AI conversations provides auditable public data on AI's real role in mathematical discovery, while independent judging of the main track reduces conflict-of-interest concerns.
  • Involving mathematicians on both sides of the AI debate in rule design addresses the math community's unease and offers a replicable governance template for responsible AI use in mathematics.

3 more related posts →

Episode 2 · Caltech to Host World's First Research-Grade Math Hackathon (2026-09-07, 4 posts)

A team led by Sathvik Redrouthu, together with Anthropic and OpenAI, will host the world's first research-grade math hackathon at Caltech from October 30 to November 1, 2026, bringing 100 teams to tackle an open math problem in 40 hours with $2 million in compute. All AI conversations will be open-sourced for academic review to ensure fairness.

Episode 3 · Nearly 500 Mathematicians Sign Open Letter Against AI-Sponsored Mathathon (2026-09-10, 4 posts)

Nearly 500 mathematicians from Caltech, MIT, Harvard and other institutions signed an open letter boycotting an AI-company-sponsored "Mathathon" hackathon at Caltech, accusing it of using compute to race ahead on open problems for publicity and calling the $2M sponsorship research misconduct.

Episode 4 · OpenAI Pulls Caltech Mathathon Sponsorship After Math Community Backlash (2026-09-11, 3 posts)

OpenAI officially withdrew its sponsorship of Caltech's Mathathon competition after backlash from the math community, acknowledging AI's disruptive progress in mathematics and expressing hope for continued dialogue.