DeepSeek V4-Pro

Connection details

Availability: Published. Check available models before calling.

Create a key in API Keys, check your account credits, and store the key in BULKTOKEN_API_KEY. Install openai for the Python or Node.js example. See Quick Start for setup commands.

Call DeepSeek V4-Pro

The examples stream answer text and use the exact BulkToken model ID. For a single JSON response, set stream to false and read choices[0].message.content.

curl -N https://bulktoken.ai/v1/chat/completions \
  -H "Authorization: Bearer $BULKTOKEN_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
  "model": "deepseek-v4-pro",
  "messages": [
    {
      "role": "user",
      "content": "Explain how a hash table works in three sentences."
    }
  ],
  "stream": true
}'

import os
from openai import OpenAI

client = OpenAI(
    api_key=os.environ["BULKTOKEN_API_KEY"],
    base_url="https://bulktoken.ai/v1",
    timeout=120.0,
)

stream = client.chat.completions.create(
    model="deepseek-v4-pro",
    messages=[{"role": "user", "content": "Explain how a hash table works in three sentences."}],
    stream=True,
)
for chunk in stream:
    if chunk.choices and chunk.choices[0].delta.content:
        print(chunk.choices[0].delta.content, end="", flush=True)

import OpenAI from "openai";

const client = new OpenAI({
  apiKey: process.env.BULKTOKEN_API_KEY,
  baseURL: "https://bulktoken.ai/v1",
  timeout: 120_000,
});

const stream = await client.chat.completions.create({
  model: "deepseek-v4-pro",
  messages: [{ role: "user", content: "Explain how a hash table works in three sentences." }],
  stream: true,
});
for await (const chunk of stream) {
  process.stdout.write(chunk.choices[0]?.delta?.content ?? "");
}

Use it in your application

Send source code, requirements, and logs as text. Preserve assistant tool calls and their matching tool results across turns. Convert visual material to text before including it.

Example task: Review this implementation and identify the smallest safe correction.

This model does not support image input. Thinking is enabled by default; controls depend on the route. Include reasoning within your output budget.

Inputs and request budgets

These are published model specifications, not a guarantee that every route supports the maximum. Input, output, and any reasoning budget must fit the selected route’s limits. A maximum is not a recommended request size. See the model catalog for current listings; models awaiting channel setup are not callable yet.

Send text content to this model. Convert source material to text before adding it to the conversation.

Streaming, tools, and JSON

The published model catalog lists streaming, tool calling, and structured output. Start with the minimal call above, then add the feature you need:

• Streaming: consume answer deltas and handle empty chunks and interruption.
• Tool calling: execute tools in your application and return results with matching IDs.
• JSON output: validate responses and check the exact format supported by the route.

Support for an OpenAI-compatible endpoint does not imply support for all provider-specific parameters or every OpenAI API.

Pricing and troubleshooting

DeepSeek prices follow the official schedule: peak hours are Monday–Friday, 01:00–04:00 and 06:00–10:00 UTC, excluding Chinese public holidays. All other hours are off-peak. Peak input, output, and cache-read rates are twice the off-peak rates; both tiers retain the 20% discount.

See the model catalog for current input, output, and applicable cache rates. Models awaiting channel setup will appear after publication. Verify actual requests in Usage Logs. Cache discounts apply to reported cache usage, not simply to repeated text.

If a request fails, check the complete key, its model restrictions, your account credits, and the exact model ID deepseek-v4-pro. For 429 or temporary service failures, follow Errors and retries.