Arc Institute
Independent research institute building genomic foundation models, including the Evo series.
Models on Rafflesia
Evo 2 7B Base
Create pooled or per-token DNA representations with an explicit layer and model release.
Evo 2 7B Base
Score a nucleotide sequence as an Evo 2 log-likelihood under the genome model, returning the total, the length-normalised mean, and optional per-position log probabilities.
Evo 2 7B Base
Generate nucleotide sequence with Evo 2, optionally continuing a supplied prompt, under explicit length, sampling, and seed controls.
Evo 2 7B Base
Score nucleotide substitutions and indels as Evo 2 delta log-likelihoods over an explicit reference window, with the window, strand policy, and reference likelihood returned alongside every score.
About
The Arc Institute is an independent nonprofit research organization in Palo Alto that funds scientists to pursue long-horizon research, in partnership with Stanford, UC Berkeley, and UCSF. Its machine learning work includes Evo, a family of genomic foundation models trained across the tree of life.
On Rafflesia, Arc's Evo 2 7B Base DNA embedding model is served for production use via the runs API.
Use these models
Every endpoint speaks the same run lifecycle: POST the endpoint id and a typed input, get a run back with outputs, provenance, and measured billing.
# one run lifecycle, every endpoint
curl https://api.rafflesia.ai/v1/runs \
-H "Authorization: Bearer $RAFFLESIA_API_KEY" \
-H "Content-Type: application/json" \
-d '{
"endpoint": "arc-institute/evo2/7b-base/embed",
"input": { "sequence": "MKTAYIAK..." }
}'