Cerebras超快推理API教程:Llama模型每秒2000Token

日期:2026-08-14 | 分类:AI工具教程


项目简介

Cerebras提供基于Wafer-Scale Engine(WSE)的超快AI推理服务,Llama-4模型推理速度达每秒2000+Token,比GPU快10-100倍。API兼容OpenAI格式。

注册与API Key

# 1. 访问 cloud.cerebras.ai 注册
# 2. 创建API Key
# 3. 设置环境变量
export CEREBRAS_API_KEY="csk-your-key"

Python SDK安装

pip install cerebras_cloud_ai

from cerebras.cloud.sdk import Cerebras

client = Cerebras(api_key="csk-your-key")

response = client.chat.completions.create(
    model="llama-4-70b-instruct",
    messages=[{"role": "user", "content": "解释一下MoE架构"}],
    max_tokens=1024
)
print(response.choices[0].message.content)

流式输出

stream = client.chat.completions.create(
    model="llama-4-70b-instruct",
    messages=[{"role": "user", "content": "写一个Python Web服务器"}],
    stream=True
)
for chunk in stream:
    if chunk.choices[0].delta.content:
        print(chunk.choices[0].delta.content, end="", flush=True)

函数调用

tools = [{
    "type": "function",
    "function": {
        "name": "get_weather",
        "description": "获取天气",
        "parameters": {"city": {"type": "string"}}
    }
}]

response = client.chat.completions.create(
    model="llama-4-70b-instruct",
    messages=[{"role": "user", "content": "北京天气怎么样"}],
    tools=tools
)

性能对比

平台模型Token/s
Cerebras WSE-3Llama-4-70B~2000
A100 GPULlama-4-70B~150
vLLM 4090Llama-4-70B~80

价格

相关阅读

📚 常见问题

Cerebras超快推理API是什么?

Cerebras提供基于Wafer-Scale Engine(WSE)的超快AI推理服务,Llama-4模型推理速度达每秒2000+Token,比GPU快10-100倍。API兼容OpenAI格式。

如何上手Cerebras超快推理API?

Llama-4-70B:$0.85/1M token