TaichuAI has made the ZDTaichu5.0-9B model publicly available. This multimodal foundation model has approximately 9 billion parameters and is designed for general visual understanding, spatial reasoning, agent tool usage, and embodied AI research.
The model's architecture combines the Qwen3.5-9B language backbone with the C-RADIOv4-H vision encoder. The model accepts text input, as well as one or more images and videos of any resolution, supporting a context length of up to 128 thousand tokens. The release, summarized by TMTPost on September 15th, focused on real-world spatial perception, transformations between different views, and task planning for embodied systems.
According to the public model card, TaichuAI demonstrates state-of-the-art results among approximately 10-billion general VLMs across a wide range of visual tasks, while also expanding its capabilities in spatial, embodied, and agentic scenarios. Noteworthy metrics in space and embodiment include ViewSpatial 62.50, MMSI-Bench 47.20, MindCube-tiny 78.27, ERQA 48.00, and RoboSpatial 56.00.
Regarding agent and instruction sets listed in the evaluation card notes, TAU2-Bench achieves a score of 87.70, and the average Claw-Eval score is 71.40, while IFEval shows 93.70. The entropy-prioritized adaptive recursive reasoning mechanism is described as a mechanism that allocates additional refinement steps for latent variables for more complex tokens.
The model's capabilities cover Optical Character Recognition (OCR) and document understanding, math on images, fine-grained 2D relationships, multi-view association, 3D scene and perspective perception, as well as tracking multiple images and videos within a long context window, including multi-step tool use planning. Actual tool execution remains the responsibility of the host application.
The spatial learning topics listed on the card include relative relationships, dense counting and framing, camera motion and depth ordering, egocentric versus allocentric views, and high-level capability definition and action planning for VLA-style adaptation.
The model weights are hosted on Hugging Face at TaichuAI/ZDTaichu5.0-9B under the NVIDIA Open Model License, while retaining the Apache-2.0 notices from Qwen3.5. A custom branch of vLLM 0.26.0 and a Docker image from TaichuAI are used for serving to provide OpenAI-compatible endpoints, with recommended sampling settings for spatial grounding and general tasks.
As with other vendor-released models, external laboratories should view benchmark scores as reported with the specified prompts and judges until independent reproduction results emerge. However, the combination of a mid-sized open multimodal checkpoint, a focus on space and agents, and ready vLLM packaging provides researchers with a concrete artifact for evaluation.