---
tags:
  - mic
  - test-artifact
base_model: google/vit-base-patch16-224
---

# Slim fixture: mic-vit-slim

A 0.2M-parameter fixture for the [vit MIC](https://huggingface.co/hf-internal-testing/vit-integration), covering [`google/vit-base-patch16-224`](https://huggingface.co/google/vit-base-patch16-224). It is a test artifact, not a usable model, tagged `test-artifact` to keep it out of candidate-model search.

- **Fixture key `3fc8366aafe8`.** It covers every checkpoint whose processor files are byte-identical and whose config matches after shrinking.
- **Same architecture, smaller config:** `ViTForImageClassification`, shrunk by the generic rule in [`sweep.py`](https://github.com/huggingface/model-integration-contracts/blob/main/experiments/sweep.py) (num_hidden_layers 2).
- **Processor files copied byte for byte** from `google/vit-base-patch16-224`: `preprocessor_config.json`.
- **Overfit to the contract's training step** (300 steps). Random weights failed the input-sensitivity gate: `pixel_values:reverse` moved the logits by only 5.9e-05 (threshold 0.001).
- **Same tensor names as the real checkpoint.** The real checkpoint has every parameter, and so does the fixture.
- **Saved in float32**, the dtype `google/vit-base-patch16-224` loads in by default.
- **Finite in float32, bfloat16, and float16** (forward, loss, gradients).

Built by [`build_fixtures.py`](https://github.com/huggingface/model-integration-contracts/blob/main/example/build_fixtures.py); [`build.json`](build.json) records the pinned sources, gate results, and file hashes. The source repository commits only `README.md` and `build.json`; rebuild the other files with `python example/build_fixtures.py --fixture mic-vit-slim`.