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FIM Completion (Beta)

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FIM Completion (Beta)

In FIM (Fill In the Middle) completion, users can provide a prefix and a suffix (optional), and the model will complete the content in between. FIM is commonly used for content completion、code completion.

Notice​

The max tokens of FIM completion is 4K.

The user needs to set base_url=https://api.deepseek.com/beta to enable the Beta feature.

Sample Code​

Below is a complete Python code example for FIM completion. In this example, we provide the beginning and the end of a function to calculate the Fibonacci sequence, allowing the model to complete the content in the middle.


from openai import OpenAI

client = OpenAI(
api_key="<your api key>",
base_url="https://api.deepseek.com/beta",
)

response = client.completions.create(
model="deepseek-v4-pro",
prompt="def fib(a):",
suffix=" return fib(a-1) + fib(a-2)",
max_tokens=128
)
print(response.choices[0].text)





Integration With Continue​

Continue is a VSCode plugin that supports code completion. You can refer to this document to configure Continue for using the code completion feature.








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