H Company released Holo4 on September 28 as a pair of models built to work across several agent interfaces instead of specializing in one. Holo4-27B is a dense 27-billion-parameter model, while Holo4-35B-A3B uses a mixture-of-experts design. H Company's release
The models can interact through graphical interfaces, code environments, MCP and APIs.
Both sizes are available through the H Models API. H Company also published weights on Hugging Face in BF16, FP8, NVFP4 and 4-bit GGUF formats, alongside Holotron4 Nano. The release page does not establish a universal minimum hardware requirement, so the downloadable formats should not be read as a promise that every local machine can run the larger models well.
H Company reports competitive results on computer-use and agent benchmarks, but those headline comparisons use varying benchmark subsets and harnesses.