Caltech Hosts World's First AI Math Hackathon with Anthropic and OpenAI

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.

2026-09-05 ~ 2026-09-06 · 23 related posts

Full story(7 episodes)→

• Episode 1: Caltech Hosts World's First AI Math Hackathon with Anthropic and OpenAI(2026-09-05, 23 posts)
• Episode 2: Caltech to Host World's First Research-Grade Math Hackathon(2026-09-07, 4 posts)
• Episode 3: Hundreds of Mathematicians Sign Open Letter Against Caltech's AI Mathathon(2026-09-10, 9 posts)
• Episode 4: OpenAI Pulls Caltech Mathathon Sponsorship After Mathematicians' Open Letter(2026-09-11, 13 posts)
• Episode 5: Caltech's AI Math Competition Mathathon Revamps Rules After Backlash(2026-09-11, 4 posts)
• Episode 6: Mathathon Organizers Redesign Event After Math Community Backlash(2026-09-11, 2 posts)
• Episode 7: Math Community Split Over AI's Role in Mathematical Research(2026-09-11, 3 posts)

• World's first math hackathon with Anthropic and OpenAI: 40 hours, $2M compute — _sathvikr · 2026-09-05
• Three-day math AI hackathon with Anthropic will open-source all AI chat logs — _sathvikr · 2026-09-05
• Caltech Mathathon: first research-level math hackathon, $2M+ AI credits, 40 hours — _sathvikr · 2026-09-05
• [source] Caltech hosts first math research hackathon: 40 hours, $2M compute, open conjectures — _sathvikr · 2026-09-05
• AI math event: main track judged by independent academics, with sponsor tracks from Cognition and Cloudflare — _sathvikr · 2026-09-05
• AI contest backed by OpenAI, DARPA, Cognition pays for solving open math problems — _sathvikr · 2026-09-05
• Caltech AI Mathathon Draws Sponsors Including Anthropic, OpenAI, and DARPA — _sathvikr · 2026-09-05
• AI hackathon puts open math problems before independent academic judges, with tracks from Cognition, Cloudflare and more — _sathvikr · 2026-09-05
• Cognition teams with OpenAI and Anthropic on first math hackathon with $2M compute — DevinAI · 2026-09-05
• [source] Mathathon Challenge convenes pro- and anti-AI mathematicians to codify research conduct rules — _sathvikr · 2026-09-06

13 near-duplicate retellings: _sathvikr · _sathvikr · DevinAI · _sathvikr · _sathvikr · _sathvikr · _sathvikr · _sathvikr · _sathvikr · _sathvikr · _sathvikr · kimberlywtan · joemeno