How to use from
vLLM
Install from pip and serve model
# Install vLLM from pip:
pip install vllm
# Start the vLLM server:
vllm serve "sjin59/c43g-s600m2"
# Call the server using curl (OpenAI-compatible API):
curl -X POST "http://localhost:8000/v1/chat/completions" \
	-H "Content-Type: application/json" \
	--data '{
		"model": "sjin59/c43g-s600m2",
		"messages": [
			{
				"role": "user",
				"content": [
					{
						"type": "text",
						"text": "Describe this image in one sentence."
					},
					{
						"type": "image_url",
						"image_url": {
							"url": "https://cdn.britannica.com/61/93061-050-99147DCE/Statue-of-Liberty-Island-New-York-Bay.jpg"
						}
					}
				]
			}
		]
	}'
Use Docker
docker model run hf.co/sjin59/c43g-s600m2
Quick Links

c43g-s600m2

Given 4 shuffled frames from a video plus a caption describing what happens, this model recovers the original chronological order of the frames.

Fine-tuned from Qwen3.5-27B (VLM):

Qwen3.5-27B
  → non-thinking full SFT   (16,070 rows, seed 43, 1,004 steps)
  → non-thinking GRPO LoRA  (r32/α64, 1,400 steps; checkpoint-600 selected)
  → LoRA merge              = this model

Output is four letters in chronological order, e.g. "C,B,A,D".

Usage

Runs on vLLM 0.19.0. In bf16 it needs 2× H100 80GB (TP2). For single-GPU inference use the GGUF build, which fits on one RTX 3090 24GB.

Default sampling is temperature 0.6 / top_p 0.95 / top_k 20 — not greedy decoding.

Licensed under Apache-2.0, following the base model Qwen3.5-27B.

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