WeiboAI

weights

open(MIT)

base

open_weights(Qwen2.5)

data

partial(RL/SFT data not fully released)

license

MIT

MIT-licensed weights, but a fine-tune of the open-weight Qwen2.5 line without a fully open or reproducible data and training pipeline, so open weights rather than open source.

• https://huggingface.co/WeiboAI/VibeThinker-3B recorded 2026-08-13

  `license:mit` in the card data and `"gated":false`; `base_model - Qwen/Qwen2.5-Coder-3B`; no RL/SFT mixture and no training pipeline published