MolmoWeb 4B Important Update! We made a few small but important updates to this HF/transformers compatible checkpoint to ensure exact outputs to our native model checkpoint on March 29, 2026 ~6PM PST . If you downloaded this model checkpoint earlier than this time, we recommend re downloading it. See PRs 2 and 3 for more details. Thanks for your understanding! MolmoWeb is a family of fully open multimodal web agents. MolmoWeb agents achieve state of the art results outperforming similar scale open weight only models such as Fara 7B, UI Tars 1.5 7B, and Holo1 7B. MolmoWeb 8B also surpasses set of marks (SoM) agents built on much larger closed frontier models like GPT 4o. We further demonstrate consistent gains through test time scaling via parallel rollouts with best of N selection, achieving 94.7% and 60.5% pass@4 (compared to 78.2% and 35.3% pass@1)on WebVoyager and Online Mind2Web respectively. Learn more about the MolmoWeb family in our announcement blog post and tech report. MolmoWeb 4B is based on Molmo2 architecture, which uses Qwen3 8B and SigLIP 2 as vision backbone. Ai2 is committed to open science. The MolmoWeb datasets are available here. All other artifacts used in crea…
We use cookies for essential functionality and analytics. You can accept or reject analytics cookies.Cookie policy