How much does Yi Lightning cost?

Yi Lightning is billed pay-as-you-go at $0.03 per 1M input tokens and $0.03 per 1M output tokens. There is no subscription — you only pay for what you use.

What can Yi Lightning do?

Yi Lightning is 01ai's chat model, accessible through the Api.Airforce API.

Is Yi Lightning free to use?

Yi Lightning is a paid, pay-as-you-go model — no subscription, you are only charged for usage.

How do I use Yi Lightning via the API?

Yi Lightning is OpenAI-compatible. Point any OpenAI SDK at https://api.airforce/v1 and pass the model ID yi-lightning with your Api.Airforce API key.

Who makes Yi Lightning?

Yi Lightning is 01ai's chat model, served through the unified Api.Airforce gateway alongside 100+ other models.

01aiPaidOperational

Yi Lightning

API model name: yi-lightning

Yi Lightning is 01ai's chat model, served on the Api.Airforce unified API. It is priced at $0.03 per million input tokens and $0.03 per million output tokens. Access it through the OpenAI-compatible API with one key, alongside 100+ other models on Api.Airforce.

Get an API key View pricing

Pricing

Input / 1M tokens

$0.03

Output / 1M tokens

$0.03

Cache read / 1M tokens

$0.01

Specifications

Provider: 01ai
Type: chat model

What is Yi Lightning used for?

Chatbots & assistants — conversational AI, drafting, summarizing and Q&A.

Yi Lightning vs. similar models

Model	Intelligence	Context	Input / 1M	Output / 1M
Yi Lightning	—	—	$0.03	$0.03
Yi Vision V2	—	—	$0.31	$0.92
DeepSeek V4 Pro	—	—	$0.86	$1.72
Devstral	—	—	Free	Free

Prices are Api.Airforce pay-as-you-go rates per 1M tokens. Context is the maximum input length.

Yi Lightning — frequently asked questions

How much does Yi Lightning cost?: Yi Lightning is billed pay-as-you-go at $0.03 per 1M input tokens and $0.03 per 1M output tokens. There is no subscription — you only pay for what you use.
What can Yi Lightning do?: Yi Lightning is 01ai's chat model, accessible through the Api.Airforce API.
Is Yi Lightning free to use?: Yi Lightning is a paid, pay-as-you-go model — no subscription, you are only charged for usage.
How do I use Yi Lightning via the API?: Yi Lightning is OpenAI-compatible. Point any OpenAI SDK at https://api.airforce/v1 and pass the model ID yi-lightning with your Api.Airforce API key.
Who makes Yi Lightning?: Yi Lightning is 01ai's chat model, served through the unified Api.Airforce gateway alongside 100+ other models.

All models·Quickstart·Chat API reference

Use Yi Lightning via the API

OpenAI-compatible — point any OpenAI SDK at https://api.airforce/v1 and pass yi-lightning as the model.

cURL

curl https://api.airforce/v1/chat/completions \
  -H "Authorization: Bearer $AIRFORCE_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "yi-lightning",
    "messages": [{ "role": "user", "content": "Hello!" }]
  }'

Python

from openai import OpenAI
client = OpenAI(base_url="https://api.airforce/v1", api_key="$AIRFORCE_API_KEY")
r = client.chat.completions.create(
    model="yi-lightning",
    messages=[{"role": "user", "content": "Hello!"}],
)
print(r.choices[0].message.content)

JavaScript

import OpenAI from "openai";
const client = new OpenAI({ baseURL: "https://api.airforce/v1", apiKey: process.env.AIRFORCE_API_KEY });
const r = await client.chat.completions.create({
  model: "yi-lightning",
  messages: [{ role: "user", content: "Hello!" }],
});
console.log(r.choices[0].message.content);