Iris1.5

IRIS1.5 is built on

• ByteDance/Ouro-1.4B (language model)
• NVlabs/RADIO radio_v2.5-h (vision model)

This repo does not include the full base models. It only includes the small trained parts from my run

• projector
• LoRA adapters

Those are stored as safetensors. Ouro and RADIO are downloaded automatically.

Contents

Bundle files

• hf_bundle_step115000/projector.safetensors
• hf_bundle_step115000/lora_edge/adapter_model.safetensors
• hf_bundle_step115000/lora_gate/adapter_model.safetensors
• hf_bundle_step115000/iris_bundle.json

Quick Start

1) Install dependencies

Install the requirements from this repository.

2) Run inference from this Hub repo

Example command from this codebase

python inference/infer_hf_bundle.py \
  --repo-id DavidSeyserHF/Iris1.5 \
  --image inference/complex.jpg \
  --prompt "What is in this image?"

Notes

• First run downloads and caches base models.
• If you want to force a specific bundle folder in the repo, use --bundle-subdir hf_bundle_step115000.

Training Setup (Short)

Base models

• LLM is ByteDance/Ouro-1.4B
• Vision model is NVlabs/RADIO radio_v2.5-h

Main config values from this checkpoint

• image_size is 432
• dtype is bf16
• projector_hidden_mult is 1
• projector_num_intermediate is 2
• use_lora is true
• lora_dual_edge_and_gate is true
• lora_edge_layers is 4
• lora_r is 16
• lora_alpha is 32
• lora_dropout is 0.05

Benchmarks

Benchmarking is currently work in progress.

Limitations and Biases

Known limitations

• can be too verbose when short answers are needed
• weak on strict answer formatting (yes/no/count/single word)

Safety and Responsible Use

Please do not use this model as the sole source for

• medical, legal, financial, or safety-critical decisions
• surveillance, profiling, or rights-impacting automated judgments

Human oversight and domain-specific validation are required for real-world deployments.

Reproducibility

Scripts used for this release

• inference/export_hf_bundle.py
• inference/infer_hf_bundle.py

License

This repository provides adapter/projector deltas only. Commercial use is restricted by the RADIO dependency license NVIDIA Source Code License-NC Link https://github.com/NVlabs/RADIO/blob/main/LICENSE Usage is also subject to the licenses and terms of

• ByteDance/Ouro-1.4B
• NVlabs/RADIO
• any datasets used during training

Citation

If you use this release please cite this IRIS adapter release. Use the repository URL and commit hash for reproducibility.

@misc{seyser2026iris1-5,
  title = {Iris1.5},
  author = {David Seyser},
  year = {2026},
  howpublished = {Hugging Face model repository},
  url = {https://huggingface.co/DavidSeyserHF/Iris1.5},
}