import os
from cerebras.cloud.sdk import Cerebras

client = Cerebras(
    api_key=os.environ.get("CEREBRAS_API_KEY"),  # This is the default and can be omitted
)

completion = client.completions.create(
    prompt="It was a dark and stormy night",
    max_tokens=100,
    model="qwen-3.8-27b",
    logprobs=5,
)

print(completion)

import Cerebras from '@cerebras/cerebras_cloud_sdk';

const client = new Cerebras({
  apiKey: process.env['CEREBRAS_API_KEY'], // This is the default and can be omitted
});

async function main() {
  const completion = await client.completions.create({
    prompt: "It was a dark and stormy night",
    model: 'qwen-3.8-27b',
    logprobs: 5,
  });

  console.log(completion?.choices[0]?.text);
}

main();

curl -X POST https://api.cerebras.ai/v1/completions \
   -H "Authorization: Bearer $CEREBRAS_API_KEY" \
   -H "Content-Type: application/json" \
   -d '{
         "prompt": "It was a dark and stormy night",
         "max_tokens": 100,
         "model": "qwen-3.8-27b",
         "logprobs": 5
       }'

{
    "id": "chatcmpl-b1743f2d-8c20-4ad5-a77c-426521ae1b1c",
    "choices": [
        {
            "index": 0,
            "finish_reason": "length",
            "logprobs": {
                "text_offset": [30, 34, 40, 44, 47, 52],
                "token_logprobs": [
                    -3.3912997245788574,
                    -4.322617053985596,
                    -0.3532562553882599,
                    -1.7001153230667114,
                    -2.187103271484375,
                    -2.4667720794677734
                ],
                "tokens": [" and", " there", " was", " no", " moon", ","],
                "top_logprobs": [
                    {
                        ".": -1.1334871053695679,
                        ",": -1.3366121053695679,
                        " when": -2.3366122245788574,
                        " in": -2.9381747245788574,
                        "...": -3.3287997245788574,
                        " and": -3.3912997245788574
                    },
                    {
                        " I": -0.9554294943809509,
                        " the": -1.7679295539855957,
                        " a": -2.2366795539855957,
                        " all": -3.1898045539855957,
                        " we": -3.4241795539855957,
                        " there": -4.322617053985596
                    },
                    {
                        " was": -0.3532562553882599,
                        " were": -1.6813812255859375,
                        " I": -4.0251312255859375,
                        " wasn": -4.1345062255859375,
                        " had": -4.1970062255859375
                    },
                    {
                        " a": -0.3719903528690338,
                        " no": -1.7001153230667114,
                        " an": -3.614177942276001,
                        " this": -4.129802703857422,
                        " nothing": -4.184490203857422
                    },
                    {
                        " electricity": -1.3433531522750854,
                        " one": -1.6949156522750854,
                        " moon": -2.187103271484375,
                        " way": -3.038665771484375,
                        " sign": -3.054290771484375
                    },
                    {
                        ".": -0.8495846390724182,
                        " to": -2.1386470794677734,
                        " in": -2.2870845794677734,
                        ",": -2.4667720794677734,
                        ".\n": -3.2714595794677734
                    }
                ]
            },
            "text": " and there was no moon,",
            "tokens": null
        }
    ],
    "created": 1769297019,
    "model": "qwen-3.8-27b",
    "object": "text_completion",
    "system_fingerprint": "fp_feb5e1faa8274e54bef0",
    "time_info": {
        "completion_time": 0.002412253,
        "prompt_time": 0.000347391,
        "queue_time": 0.000245702,
        "total_time": 0.004331350326538086,
        "created": 1769297019.2632425
    },
    "usage": {
        "completion_tokens": 6,
        "prompt_tokens": 8,
        "prompt_tokens_details": {
            "cached_tokens": 0
        },
        "total_tokens": 14
    }
}