Introduction
INTELLECT-3.1 is a 106B (A12B) parameter Mixture-of-Experts reasoning model built as a continued training of INTELLECT-3 with additional reinforcement learning on math, coding, software engineering, and agentic tasks.
Training was performed with prime-rl using environments built with the verifiers library.
All training and evaluation environments are available on the Environments Hub.
The model, training frameworks, and environments are open-sourced under fully-permissive licenses (MIT and Apache 2.0).
For more details, see the technical report.
Serving with vLLM
The model can be served on 2x H200s:
vllm serve PrimeIntellect/INTELLECT-3.1 \ --tensor-parallel-size 2 \ --enable-auto-tool-choice \ --tool-call-parser qwen3_coder \ --reasoning-parser deepseek_r1
Citation
@misc{intellect3.1, title={INTELLECT-3.1: Technical Report}, author={Prime Intellect Team}, year={2025}, url={https://huggingface.co/PrimeIntellect/INTELLECT-3.1}}