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Polymath (YC W26) — Simulation environments to train & evaluate long-horizon AI agents

Polymath appears in Y Combinator's company directory in the Winter 2026 batch, listed 2026-01-22. Simulation environments to train & evaluate long-horizon AI agents.

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Polymath: Accepted into Y Combinator Winter 2026

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Polymath

New accelerator entry · 2026-01-22 · the record

Winter 2026
batch
6
people
Early
stage
United States of America
region
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In their words

Polymath is a data lab focused on improving long-horizon agent capabilities and alignment

What the record says

BatchWinter 2026
Announced2026-01-22
StageEarly
StatusActive
Team size6
IndustryB2B
Sub-industryB2B
RegionsUnited States of America, America / Canada
BasedSan Francisco, CA, USA
HiringYes
Sitehttps://polymathlabs.ai/
Previously known asPalette AI

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If you're behind Polymath: acceptance into a YC batch is one of the few weeks a young company gets looked up by people who matter — investors, other founders, press. FoxPlug turns the commits, deploys, and releases you're already making into that story automatically, so anyone who looks finds something current. FoxChat puts a guide on your own site so the people YC's own page just sent you don't read one line and leave.

Sourced from the company's Y Combinator directory entry.

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Permanent URL: https://mentionfox.com/funding/yc-polymath
Last updated 2026-09-26
Primary record: Y Combinator directory entry
Polymath (YC W26) — Simulation environments to train & evaluate long-horizon AI agents. MentionFox, 2026-09-26. https://mentionfox.com/funding/yc-polymath