OpenAI · Responses

GPT-6 Astra API

OpenAI's heavier reasoning model for maths, planning and hard problems. Served through RouterHub at $0.7474 input / $3.737 output per million tokens (prices as of ).

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GPT-6 Astra pricing

−92% vs the official API price of $10.00 input / $50.00 output per 1M tokens (source, checked 2026-10-13).

Input
$0.7474
Cached input
$0.07474
Cache write
$0.9342
Output
$3.737
Typical message
≈ 0.26¢

USD per 1 million tokens. A typical message is about 1,000 input and 500 output tokens. Cached input uses the cache-read rate when the provider reports a cache hit. Billed from your prepaid balance.

API compatibility and context

Exact model ID
gpt-6-astra
Provider
OpenAI
Variant
Standard
Supported API
OpenAI-compatible Responses API (/v1/responses)
Availability
Preview
Context window
1,050,000 tokens
Maximum input
922,000 tokens
Maximum output
128,000 tokens

Use GPT-6 Astra through the API

Create a RouterHub account, add prepaid credits and create an API key. Set ROUTERHUB_API_KEY locally, then send a first request with the exact model ID.

cURL
curl --connect-timeout 30 --max-time 600 https://routerhub.si/v1/responses \
  -H "Authorization: Bearer $ROUTERHUB_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"model":"gpt-6-astra","input":"Write a short noir scene set in a lighthouse.","max_output_tokens":256}'

Python: install openai with pip. The example requests 256 output tokens and disables automatic retries, so check Usage before resending a paid request.

Python
import os
from openai import OpenAI

client = OpenAI(
    api_key=os.environ["ROUTERHUB_API_KEY"],
    base_url="https://routerhub.si/v1",
    timeout=600.0,
    max_retries=0,
)
response = client.responses.create(
    model="gpt-6-astra",
    input="Write a short noir scene set in a lighthouse.",
    max_output_tokens=256,
)
print(response.output_text)

Coding tools that work with GPT-6 Astra

Common questions

What is GPT-6 Astra?

GPT-6 Astra is an OpenAI language model served through RouterHub using the OpenAI-compatible Responses API. Its exact API model ID is gpt-6-astra.

How much does GPT-6 Astra cost?

RouterHub charges $0.7474 input, $0.07474 cached input and $3.737 output per million tokens (prices as of 2026-11-08). A typical chat message of about 1,000 input and 500 output tokens costs about 0.26¢. Usage is billed against your prepaid balance.

What is the GPT-6 Astra context window?

Context window: 1,050,000 tokens. Maximum input: 922,000 tokens. Maximum output: 128,000 tokens.

Which API does GPT-6 Astra support?

Use the OpenAI-compatible Responses API at https://routerhub.si/v1/responses with the exact model ID gpt-6-astra and your RouterHub API key (Authorization: Bearer header).

Which coding tools work with GPT-6 Astra?

OpenCode, Codex CLI, VS Code + Continue. Each setup guide lists only compatible model IDs.

Can I try GPT-6 Astra for free?

GPT-6 Astra needs a free RouterHub account with prepaid credits. New accounts get $5 free on their first top-up of $20 or more.

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