GLM 5.2 is live! Opus-level intelligence at open-source rates. Pay per token on serverless. Try it today.

Model Library
/Allen Institute for AI/Molmo2-4B
Allen Institute for AI logo

Molmo2-4B

Ready
model path:accounts/fireworks/models/molmo2-4b

Molmo2 is a family of open vision-language models developed by the Allen Institute for AI (Ai2) that support image, video and multi-image understanding and grounding. Molmo 2 (4B) is Qwen 3-based – optimized for efficiency.

Molmo2-4B API Features

On-demand Deployment

Docs

On-demand deployments allow you to use Molmo2-4B on dedicated GPUs with Fireworks' high-performance serving stack with high reliability and no rate limits.

Metadata

State
Ready
Created on
12/29/2025
Kind
Base model
Provider
Allen Institute for AI
Hugging Face
allenai/Molmo2-4B

Specification

Calibrated
No
Mixture-of-Experts
No
Parameters
4B

Supported Functionality

Fine-tuning
Not supported
Serverless
Not supported
Context Length
36.8k tokens
Function Calling
Not supported
Embeddings
Not supported
Rerankers
Not supported
Support image input
Supported