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NVIDIA-NeMo / labs-molt

A scalable, agentic-first, and HuggingFace-native RL framework for research (9k lines).

Why this job: matched by what the repo talks about: framework, agentic, research, first

Molt architecture: Agent · vLLM rollout · Ray async queue · single-actor AutoModel/FSDP2 trainer, fully async

What it does

PyTorch. That is the whole stack: ~9.2K lines of RL code that scale to 1T-class MoE on vLLM with TP / EP / CP — think DeepSeek-V3 at --fsdp.ep_size 256, Adam CPU offload for the largest actors. One agent API, one trainable actor, clean enough to read end-to-end.

Get started

git clone https://github.com/NVIDIA-NeMo/labs-molt.git
cd labs-molt
Maintenance
Active
Last commit today
Stars
1,281
+63 this week
Licence
Apache-2.0
Allows business use
Downloads for
None listed
No release files
Latest version
v0.2.2
Released 6 days ago
Built with
Python
97% of the code

Is it looked after?

Contributors
11
Last 90 days
Issues
47% closed
9 still open
Pull requests
195 merged
12 waiting
Releases
16
16 in the last year
More: languages, topics and project record

Languages

  • Python 97%
  • Dockerfile 2%
  • Shell 1%

Topics

  • agentic-rl
  • expert-parallelism
  • fsdp
  • llm
  • rl-framework
  • rlhf
  • rlvr
  • tensor-parallelism
  • huggingface
  • context-parallelism

Project record

  • JobAgent frameworks
  • StatusListed
  • Commits337
  • Forks126
  • Watching5
  • Stars in 28 days+90
  • CreatedJun 23, 2026
  • First seen by usNov 7, 2026
  • CheckedNov 12, 2026

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