Metacognition NavGPT3 Hugging Face: https://huggingface.co/Metacognition-AI/NavGPT3-8B, https://huggingface.co/Metacognition-AI/NavGPT3-4B GitHub: https://github.com/metacognitionai/NavGPT-3 Website: https://metacognitionai.github.io/NavGPT3/ Technical report: https://arxiv.org/abs/2610.10787 Developer: Metacognition Released: October 2026 Variants: 4B, 8B Parameters: 4.44B (4B checkpoint), 8.77B (8B checkpoint) Architecture: Qwen3-VL fine-tune with a two-layer MLP action head on the last prompt token’s hidden state; one 3,072-token visual budget shared across a four-view, up to 16-step image history License: GNU Affero General Public License v3.0 Modalities: Text + Four-view RGB image history in / 8 waypoints (x, y, theta) out Runs on: NVIDIA GPU (Linux) Formats: safetensors On disk: 9.66GB (4B checkpoint), 17.54GB (8B checkpoint)