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Model: sasa2000/cosmos-reason2-2b-text-only
Source: Original Platform

.gitattributes

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README.md

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+---
+license: other
+license_name: nvidia-open-model-license
+license_link: https://www.nvidia.com/en-us/agreements/enterprise-software/nvidia-open-model-license
+library_name: transformers
+pipeline_tag: text-generation
+base_model: nvidia/Cosmos-Reason2-2B
+tags:
+- transformers
+- safetensors
+- qwen3
+- cosmos
+- nvidia
+- text-generation
+- text-only
+---
+
+# Cosmos-Reason2-2B Text-Only
+
+This is a text-only extraction of [`nvidia/Cosmos-Reason2-2B`](https://huggingface.co/nvidia/Cosmos-Reason2-2B).
+
+Built on NVIDIA Cosmos.
+
+The original model is a Qwen3-VL/Cosmos vision-language model. This repository keeps the language backbone and `lm_head`, removes the vision tower and projector weights, and saves the result as a standalone Hugging Face `Qwen3ForCausalLM` checkpoint.
+
+## What Changed
+
+- Source model: `nvidia/Cosmos-Reason2-2B`
+- Output architecture: `Qwen3ForCausalLM`
+- Output `model_type`: `qwen3`
+- Kept tensors: 311
+- Dropped tensors: 315
+- Removed weight prefixes include `model.visual.*` and other multimodal components
+- Output weights: `model.safetensors`
+
+The original nested text config used `qwen3_vl_text`. It was converted to a `qwen3` CausalLM-compatible config because the tested Transformers environment did not expose `qwen3_vl_text` through `AutoModelForCausalLM`.
+
+## Validation
+
+Validated locally with:
+
+- `torch 2.12.1+cpu`
+- `transformers 5.12.1`
+- `safetensors 0.8.0`
+
+Checks performed:
+
+- `AutoConfig.from_pretrained(...)` loads as `Qwen3Config`
+- `AutoTokenizer.from_pretrained(...)` loads as `Qwen2Tokenizer`
+- `AutoModelForCausalLM.from_pretrained(...)` loads as `Qwen3ForCausalLM`
+- Forward pass succeeds on a short text prompt
+- Output logits shape: `(1, 7, 151936)`
+- No `visual`, `vision`, `projector`, or `language_model` tensor names remain in the exported checkpoint
+
+## Usage
+
+```python
+import torch
+from transformers import AutoModelForCausalLM, AutoTokenizer
+
+model_id = "sasa2000/cosmos-reason2-2b-text-only"
+
+tokenizer = AutoTokenizer.from_pretrained(model_id)
+model = AutoModelForCausalLM.from_pretrained(
+    model_id,
+    torch_dtype="auto",
+    device_map="auto",
+)
+
+inputs = tokenizer("Explain why objects fall toward Earth.", return_tensors="pt").to(model.device)
+with torch.no_grad():
+    output_ids = model.generate(**inputs, max_new_tokens=128)
+
+print(tokenizer.decode(output_ids[0], skip_special_tokens=True))
+```
+
+## Limitations
+
+This checkpoint is text-only. It does not include the original vision tower, video/image processor, or multimodal projector weights. Image and video inputs are not supported.
+
+This is an unofficial derived checkpoint and is not released by NVIDIA.
+
+## License
+
+The source model is released under the [NVIDIA Open Model License](https://www.nvidia.com/en-us/agreements/enterprise-software/nvidia-open-model-license). Use of this derived checkpoint must comply with the original model license and any applicable terms.
+
+Licensed by NVIDIA Corporation under the NVIDIA Open Model License.

config.json

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+{
+  "attention_bias": false,
+  "attention_dropout": 0.0,
+  "bos_token_id": 151643,
+  "dtype": "bfloat16",
+  "eos_token_id": 151645,
+  "head_dim": 128,
+  "hidden_act": "silu",
+  "hidden_size": 2048,
+  "initializer_range": 0.02,
+  "intermediate_size": 6144,
+  "max_position_embeddings": 262144,
+  "model_type": "qwen3",
+  "num_attention_heads": 16,
+  "num_hidden_layers": 28,
+  "num_key_value_heads": 8,
+  "rms_norm_eps": 1e-06,
+  "rope_scaling": {
+    "rope_type": "default"
+  },
+  "rope_theta": 5000000,
+  "tie_word_embeddings": false,
+  "use_cache": true,
+  "vocab_size": 151936,
+  "transformers_version": "4.57.0.dev0",
+  "architectures": [
+    "Qwen3ForCausalLM"
+  ]
+}

generation_config.json

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+{
+    "bos_token_id": 151643,
+    "pad_token_id": 151643,
+    "do_sample": true,
+    "eos_token_id": [
+        151645,
+        151643
+    ],
+    "top_p": 0.8,
+    "top_k": 20,
+    "temperature": 0.7,
+    "repetition_penalty": 1.0,
+    "transformers_version": "4.56.0"
+}

model.safetensors

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+oid sha256:a7c843224c834676d120a9f54501115fbb1adf4776c022bdaaf734fbba0258ef
+size 4063515608

text_only_extraction_manifest.json

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+{
+  "source": "",
+  "target_model_type": "qwen3",
+  "target_architectures": [
+    "Qwen3ForCausalLM"
+  ],
+  "kept_tensors": 311,
+  "dropped_tensors": 315,
+  "total_size": 4063479808,
+  "weight_files": [
+    "model.safetensors"
+  ]
+}