VibeThinker-1.5B-f32-GGUF

VibeThinker-1.5B is a 1.5‑billion‑parameter dense language model from WeiboAI, fine‑tuned from Qwen2.5-Math-1.5B and purpose‑built for competitive math and algorithmic coding problems, where it delivers frontier‑level reasoning despite its small size. Trained with the “Spectrum‑to‑Signal Principle” framework that first maximizes solution diversity in supervised fine‑tuning and then reinforces correct reasoning paths via reinforcement learning, it achieves scores of 80.3, 74.4, and 50.4 on AIME24, AIME25, and HMMT25 respectively—surpassing the much larger DeepSeek R1—and reaches 55.9/51.1 on LiveCodeBench v5/v6, rivaling or beating larger models like Magistral Medium. The model is fully open source under the MIT license, trained with a reported post‑training cost of about $7,800, and is recommended for use specifically on math and coding tasks with long output lengths (up to around 40k tokens) using moderate sampling temperatures.

Model Files

VibeThinker-1.5B [GGUF]

Quants Usage

(sorted by size, not necessarily quality. IQ-quants are often preferable over similar sized non-IQ quants)

Here is a handy graph by ikawrakow comparing some lower-quality quant types (lower is better):