signalHugging Face Blog2026-09-29
Holo4: powering generalist computer-use agents
Holo4 is a new series of agentic models in two sizes: 27B dense and 35B-A3B Mixture of Experts. It interacts with software through any interface, including GUIs, code, MCP and APIs, and competes with frontier models on benchmarks like OSWorld 2.0 at a much lower cost. The models are available on the H Models API, and all trajectories behind public benchmark scores are open-sourced.
- for who
- Developers and businesses building generalist computer-use agents.
- why now
- Holo4 just released on H Models API, offering frontier-level computer-use at lower cost.
- what changes
- They can use one model across all interfaces, eliminating the need to pick a different model per platform.
- to do
- Access Holo4 models via the H Models API and download open trajectories from Hugging Face.
key points
- Holo4 comes in 27B dense and 35B-A3B MoE sizes, available on H Models API.
- On OSWorld 2.0, Holo4 27B scores 61.7% vs Opus 5.5's 81.8% at lower cost.
- Trajectories for public benchmark runs are open-sourced on Hugging Face.
#holo4#agent model#open source#benchmark#multi-interface control
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