Holo4
H's open-weight Holo4 models combine GUI control, coding, MCP, and API calls across desktop, web, and Android tasks.
Overview
H released Holo4 on September 28, 2026 in a 27B dense model and a 35B-A3B mixture-of-experts model. Both can operate GUIs, write and run code, and call MCP or API tools, with weights published in BF16, FP8, NVFP4, and GGUF formats as well as access through the H Models API. H reports 61.7% for Holo4 27B on OSWorld 2.0 in its own harness; the company notes that benchmark subsets and harnesses vary across comparisons.
This is a sourced directory entry. Features and capabilities are reported in the linked sources; this entry does not document independent Aymorphic testing.
Key features
- 27B dense and 35B-A3B mixture-of-experts variants
- Combined GUI, code, MCP, and API interaction in one model
- Published weights in BF16, FP8, NVFP4, and 4-bit GGUF
- H Models API access and downloadable benchmark trajectories
Use cases
- Build an agent that mixes desktop clicks with code and API calls
- Run an open-weight computer-use model locally
- Evaluate multi-step desktop or browser workflows using public trajectories
Pricing
Weights are free to download; H Models API has a free tier and usage-based model pricing.
Pricing reflects the source record and may change. Confirm current terms with the provider.
Dates and sources
- Released
- 28 Sept 2026
- Record updated
- 1 Oct 2026
- Record last checked
- 1 Oct 2026