This tiny model is for debugging. It is randomly initialized with the config adapted from openai/gpt-oss-120b.
Note: This model is in BF16; quantized MXFP4 FFN is not used.
Example usage:
- vLLM
vllm serve yujiepan/gpt-oss-tiny-random-bf16
- Transformers
import torch
from transformers import pipeline
model_id = "yujiepan/gpt-oss-tiny-random-bf16"
pipe = pipeline(
"text-generation",
model=model_id,
torch_dtype=torch.bfloat16,
device_map="cuda"
)
messages = [
{"role": "user", "content": "Explain quantum mechanics clearly and concisely."},
]
outputs = pipe(
messages,
max_new_tokens=16,
)
print(outputs[0]["generated_text"][-1])
Codes to create this repo:
import json
import torch
from huggingface_hub import hf_hub_download
from transformers import (
AutoConfig,
AutoModelForCausalLM,
AutoProcessor,
AutoTokenizer,
GenerationConfig,
GptOssForCausalLM,
pipeline,
set_seed,
)
source_model_id = "openai/gpt-oss-120b"
save_folder = "/tmp/yujiepan/gpt-oss-tiny-random-bf16"
processor = AutoProcessor.from_pretrained(source_model_id)
processor.save_pretrained(save_folder)
with open(hf_hub_download(source_model_id, filename='config.json', repo_type='model'), 'r') as f:
config_json = json.load(f)
config_json.update({
"head_dim": 32,
"hidden_size": 32, # required by Mxfp4GptOssExperts codes
"intermediate_size": 64,
"layer_types": ["sliding_attention", "full_attention"],
"num_attention_heads": 2,
"num_hidden_layers": 2,
"num_key_value_heads": 1,
"num_local_experts": 32,
"tie_word_embeddings": True,
})
quantization_config = config_json['quantization_config']
del config_json['quantization_config']
with open(f"{save_folder}/config.json", "w", encoding='utf-8') as f:
json.dump(config_json, f, indent=2)
config = AutoConfig.from_pretrained(save_folder)
print(config)
torch.set_default_dtype(torch.bfloat16)
model = AutoModelForCausalLM.from_config(config)
torch.set_default_dtype(torch.float32)
model.generation_config = GenerationConfig.from_pretrained(
source_model_id, trust_remote_code=True,
)
set_seed(42)
with torch.no_grad():
for name, p in sorted(model.named_parameters()):
torch.nn.init.normal_(p, 0, 0.1)
print(name, p.shape)
model.save_pretrained(save_folder)
# mxfp4
from transformers.quantizers.quantizer_mxfp4 import Mxfp4HfQuantizer
# model = AutoModelForCausalLM.from_pretrained(save_folder, trust_remote_code=True, torch_dtype=torch.bfloat16, quantization_config=quantization_config)
# model.save_pretrained(save_folder, safe_serialization=True)