URSA B
AI benchmark
- Built by
- Insilico Medicine
- Tier
- B why
- Snapshot
What is URSA?
URSA benchmarks retrosynthesis systems and LLMs on synthesis planning for novel drug-like target molecules, scoring routes for stock termination and chemical plausibility.
Health and bio mostly
“Synthesis planning aiming to find pathways of reactions for a target molecule is one of the most important and challenging tasks in drug discovery.”
arxiv.org/abs/2607.04688v1 ↗“benchmark the synthetic routes not only from a formal perspective, such as convergence to commercially available starting materials, but also from a chemical plausibility perspective”
arxiv.org/abs/2607.04688v1 ↗
Who built URSA
Led by Insilico Medicine.
Paper: arxiv.org/abs/2607.04688v1 ↗
Tier B
Established: 15 or more models scored, or curated RL directories rate it.
How much stands behind a tier: usage, who backs it, a confirmed line from its own site or paper, and a clear read on X. High with three of the four, medium with two, low otherwise.
- 15 models scored
- in curated RL directories (1 pt)
How we got to tier B
- Adoption: 15 models scored. Tier B.
- Not yet read on X.
- In curated RL directories: 1 point, a floor of none.
- Confirmed: a line from its own site or paper places it.
A clear view on X moves a tier one step up or down; most entries don't move. How tiers work.
Where URSA sits
Its domain on the map, live. Hover a logo for its name; click to open it. Open it on the full map
Next: browse all benchmarks. Entry from the RL Research daily scrape of public sources, 2026-10-19 snapshot.