```CODE: 
from sentence_transformers import SentenceTransformer

model = SentenceTransformer("Qwen/Qwen3-Embedding-0.6B")

sentences = [
    "The weather is lovely today.",
    "It's so sunny outside!",
    "He drove to the stadium."
]
embeddings = model.encode(sentences)

similarities = model.similarity(embeddings, embeddings)
print(similarities.shape)
# [3, 3]
```

ERROR: 
Traceback (most recent call last):
  File "/tmp/Qwen_Qwen3-Embedding-0.6B_02swo0t.py", line 14, in <module>
    from sentence_transformers import SentenceTransformer
ModuleNotFoundError: No module named 'sentence_transformers'