The work
behind Arvo.
OpenArtemis is a private AI research laboratory. Our focus is on building safe, reliable, and efficient models — and the infrastructure to keep them that way as they scale.
Three areas. One north star.
Models you can trust with real work.
Arvo is aligned through a deep human-feedback loop and principled evaluation. We invest in harmlessness, refusal calibration, and prompt-injection resistance as first-class engineering problems — not afterthoughts.
Evaluation is a system, not a benchmark.
Every Arvo model is validated against continuous internal evaluations covering reasoning, factuality, long-context synthesis, code, and tool-use. What ships is what was measured — not a leaderboard snapshot.
Frontier quality without the frontier bill.
Arvo is built on a principled, proprietary architecture engineered for efficiency at every scale. The goal is simple: more intelligence per watt, so the cost of a great answer keeps falling.
OpenArtemis is a private lab. We do not disclose model weights, training recipes, or architectural details. We do share what we learn about building AI products that people can rely on — the engineering, the evaluation, and the safety work.
Arvo Kin, Fern, and Stoic are available today through the developer platform. Our research appears in product form first.
Safe, reliable, efficient — in that order, at every scale.