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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​

  1. The max tokens of FIM completion is 4K.
  2. 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-coder",
    prompt="def fib(a):",
    suffix="    return fib(a-1) + fib(a-2)",
    max_tokens=128
)
print(response.choices[0].text)