Bijan Bowen tests the experimental DeepSeek V4 Flash Vision model through the new DeepSeek Harness, focusing on whether visual feedback improves practical coding work. The model builds a Mac OS 9-inspired browser environment, a 3D wrestling game and several reference-driven interfaces while showing strong attention to visual style and unexpected implementation detail.
Bijan Bowen also gives the model room photographs for a Blender reconstruction, a subway-game reference image and a New York skateboarding prompt. The room reconstruction and skateboarding game are convincing, while the first subway result fails badly and needs a long corrective follow-up, providing a useful counterexample to the strongest demonstrations.
Bijan Bowen reports that the complete test set remained inexpensive relative to the long task durations, but notes that costs have risen and the experimental weights were not available on Hugging Face during recording. His conclusion is that vision materially improves this model's ability to inspect and refine visual work, without eliminating reliability problems on complex multi-tool tasks.
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