H Company Releases Holo4: Open-Weight Computer-Use Models That Click, Code and Call Tools Across Desktop, Web, Android and APIs
Open-weight computer-use models just got multimodal. H's Holo4 clicks, codes, and calls tools across desktop, web, Android—and the weights are out now.
Why it matters
Holo4 is a generalist agent foundation model family shipping in open weight, capable of GUI automation, code generation, and tool calling across multiple platforms. This democratizes computer-use capabilities that were previously gated behind proprietary APIs, expanding the surface for agent deployment and fine-tuning.
The key facts
6 to knowHolo4 ships in two sizes: 27B (dense) and 35B-A3B (Mixture of Experts, 3B active)
256K context window
Supports screen interaction (clicks, typing), code generation, MCP/API tool calling
Open-weight release; weights publicly available
Multi-platform: desktop, web, Android, API-native
Published Sep 29, 2026
The story so far
Earlier coverage of this storyline
- Kyutai Releases Voice of Reason: A Speech-Native Model that Solves Spoken Math with Reinforcement LearningMarkTechPost
- NVIDIA Releases Nemotron 3 Diarization: A 100M-Parameter Open-Weight Model That Tracks 8 Speakers in Real TimeMarkTechPost
- Holo4: powering generalist computer-use agentsHugging Face Blog
- This story
Go to the source
MarkTechPostmarktechpost.com
Publisher excerpt: H Company has released Holo4, a family of generalist computer-use models for AI agents. One set of weights clicks and types on screens. It also writes code and calls MCP or API tools. Holo4 ships in 2 sizes: Holo4 27B (dense) and Holo4 35B-A3B (Mixture of Experts, 3B active). Both serve a 256K…