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docs/configuration/model_resolution.md

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+# Model Resolution
+
+vLLM loads HuggingFace-compatible models by inspecting the `architectures` field in `config.json` of the model repository
+and finding the corresponding implementation that is registered to vLLM.
+Nevertheless, our model resolution may fail for the following reasons:
+
+- The `config.json` of the model repository lacks the `architectures` field.
+- Unofficial repositories refer to a model using alternative names which are not recorded in vLLM.
+- The same architecture name is used for multiple models, creating ambiguity as to which model should be loaded.
+
+To fix this, explicitly specify the model architecture by passing `config.json` overrides to the `hf_overrides` option.
+For example:
+
+```python
+from vllm import LLM
+
+llm = LLM(
+    model="cerebras/Cerebras-GPT-1.3B",
+    hf_overrides={"architectures": ["GPT2LMHeadModel"]},  # GPT-2
+)
+```
+
+Our [list of supported models](../models/supported_models.md) shows the model architectures that are recognized by vLLM.