EvolutionaryScale

weights

open(ungated esm3_sm_open_v1.pth with structure and function decoder weights alongside)

data

closed(2.78 billion natural proteins described by count, corpus not released)

code

partial(inference, generation and tutorial code in the esm package

license

MIT(OSI

The open checkpoint moved namespaces and lost its license metadata on the way - the EvolutionaryScale repo now redirects to biohub and the destination card has no license field at all. MIT is still stated, in the card body and in the repository LICENSE.md under a Chan Zuckerberg Biohub copyright, so the grant exists; confidence is medium because it is asserted in prose rather than declared on the artifact. Only the 1.4B tier is distributed; the 7B and 98B models are served through the platform API and are outside this axis.

• https://huggingface.co/api/models/EvolutionaryScale/esm3-sm-open-v1 recorded 2026-09-10

  Redirects to huggingface.co/api/models/biohub/esm3-sm-open-v1; gated: false; private: false; no license tag and no cardData license key; data/weights/esm3_sm_open_v1.pth, esm3_structure_decoder_v0.pth and esm3_function_decoder_v0.pth present.

• https://huggingface.co/biohub/esm3-sm-open-v1/raw/main/README.md recorded 2026-09-10

  Front matter declares only language and tags, no license. The body says "This repository is under a MIT license" and links the esm repository LICENSE.md; training is described as 2.78 billion natural proteins, with no corpus released.

• https://raw.githubusercontent.com/Biohub/esm/main/LICENSE.md recorded 2026-09-10

  "License (MIT)", Copyright 2026 Chan Zuckerberg Biohub, Inc., with the standard MIT permission grant.

• https://raw.githubusercontent.com/Biohub/esm/main/_assets/ESM3_README.md recorded 2026-09-10

  "These models are available under the MIT license." Code covers local inference and generation and a tutorials cookbook; the 7B and 98B tiers are reachable only through the hosted platform.