Call gpt-6-astra on Lazu: the stable lane costs $10.00 per million input tokens and $50.00 per million output tokens, the same as the OpenAI official price; the discount lane costs $1.80 / $9.00, 82% less. The discount lane is a reverse-engineered route, not the official API; use it only in Codex. 256k context, up to 128k output tokens, with Tool calling, Vision, Reasoning and Structured output.
GPT-6 Astra via the Responses API. Lazu currently supports up to 256K context; longer contexts are not available.
Prices and lanes
USD per million tokens. Availability covers the last 7 days, 2 hours per bar. A request whose input (cached tokens included) passes the threshold is billed entirely at the long-context prices.
Prices checked 2026-10-03 17:21 UTC · How to choose a lane · gpt-6-astra.json · gpt-6-astra.md
Capabilities
- Reasoning effort
- low · medium · high · xhigh · max
- Unsupported parameters
- temperature — leave it out of the request; this model does not accept it
Example request
curl -X POST https://api.lazu.ai/v1/chat/completions \
-H "Authorization: Bearer $LAZU_API_KEY" \
-H "Content-Type: application/json" \
-d '{
"model": "gpt-6-astra",
"messages": [{ "role": "user", "content": "Hello from Lazu" }]
}'import os
from openai import OpenAI
client = OpenAI(
base_url="https://api.lazu.ai/v1",
api_key=os.getenv("LAZU_API_KEY"),
)
resp = client.chat.completions.create(
model="gpt-6-astra",
messages=[{"role": "user", "content": "Hello from Lazu"}],
)
print(resp.choices[0].message.content)import OpenAI from "openai";
const client = new OpenAI({
baseURL: "https://api.lazu.ai/v1",
apiKey: process.env.LAZU_API_KEY,
});
const resp = await client.chat.completions.create({
model: "gpt-6-astra",
messages: [{ role: "user", content: "Hello from Lazu" }],
});
console.log(resp.choices[0].message.content);Any OpenAI SDK works too: set base_url to https://api.lazu.ai/v1. Full integration docs
Questions
What is the difference between the stable and discount lanes?
The stable lane runs on each maker's official API, is billed at the list price, has the highest availability and suits every use. The discount lane is a reverse-engineered route: a third-party supplier serves the model through its official client, not the official API. It costs far less, but availability varies, a failed request does not fall back to the stable lane, and the supplier may add its own system prompt. So use it only inside the matching agent tool: Claude models in Claude Code, GPT models in Codex, Gemini models in Antigravity. For your own code, or anywhere the output must be controlled exactly, use the stable lane. Both lanes work with the same key, and each key picks the lane per model.
Can I call gpt-6-astra with the OpenAI SDK?
Yes. Point the SDK's base URL at https://api.lazu.ai/v1 and use gpt-6-astra as the model name.
How is it billed?
Per token actually used — input, output and cache — deducted from your wallet balance. There is no monthly fee, and every request shows up itemized in your usage log.