Streaming

Set stream: true on Chat Completions to receive the response incrementally over Server-Sent Events, instead of waiting for the full completion.

curl https://api.dravenai.lat/v1/chat/completions \
  -H "Authorization: Bearer sk-drv-your-api-key" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "your-model-id",
    "messages": [{ "role": "user", "content": "Count to 5." }],
    "stream": true
  }'

completion = client.chat.completions.create(
    model="your-model-id",
    messages=[{"role": "user", "content": "Count to 5."}],
    stream=True,
)

const stream = await client.chat.completions.create({
  model: "your-model-id",
  messages: [{ role: "user", content: "Count to 5." }],
  stream: true,
});

Event format

The response has Content-Type: text/event-stream. Each event is a line beginning with data: , followed by a chat.completion.chunk object, ending in a final data: [DONE] line:

data: {"id":"chatcmpl-...","object":"chat.completion.chunk","created":1750000000,"model":"your-model-id","choices":[{"index":0,"delta":{"role":"assistant","content":""},"finish_reason":null}]}

data: {"id":"chatcmpl-...","object":"chat.completion.chunk","created":1750000000,"model":"your-model-id","choices":[{"index":0,"delta":{"content":"1"},"finish_reason":null}]}

data: {"id":"chatcmpl-...","object":"chat.completion.chunk","created":1750000000,"model":"your-model-id","choices":[{"index":0,"delta":{},"finish_reason":"stop"}],"usage":{"prompt_tokens":12,"completion_tokens":9,"total_tokens":21}}

data: [DONE]

How to consume it

• The first chunk always carries delta.role: "assistant" with empty content, so you can initialize the message.
• Subsequent chunks carry delta.content fragments — append them in order to reconstruct the full text.
• The final chunk before [DONE] has an empty delta, a non-null finish_reason, and includes usage for the whole response (equivalent to passing stream_options: { include_usage: true } on OpenAI).
• The stream always ends with a literal data: [DONE] line.

for chunk in stream:
    delta = chunk.choices[0].delta.content
    if delta:
        print(delta, end="")

for await (const chunk of stream) {
  process.stdout.write(chunk.choices[0]?.delta?.content || "");
}