DeepSeek API pricing

import OpenAI from 'openai';

// Initialize OpenAI client pointing to DeepSeek API
const openai = new OpenAI({
  baseURL: 'https://api.deepseek.com',
  apiKey: process.env.DEEPSEEK_API_KEY || '<YOUR_KEY>',
});

async function main() {
  const stream = await openai.chat.completions.create({
    model: 'deepseek-flash',
    messages: [
      { role: 'system', content: 'You are an expert systems engineer.' },
      { role: 'user', content: 'Design a lock-free queue with zero-copy buffer in C++20.' },
    ],
    stream: true,
    reasoning_effort: 'high',
    extra_body: {
      thinking: { type: 'enabled' },
    },
  });

  for await (const chunk of stream) {
    const delta = chunk.choices[0]?.delta as any;
    // Inspect dynamic reasoning thoughts if available
    if (delta?.reasoning_content) {
      process.stdout.write(delta.reasoning_content);
    } else if (delta?.content) {
      process.stdout.write(delta.content);
    }
  }
}

main();