GPT-6 Astra
OpenAI’s flagship, for the hardest maths, science and long agent work.
About GPT-6 Astra
Astra is the top of OpenAI’s GPT-6 family and the model OpenAI calls its most capable. Its launch numbers are strongest in maths and science — 96.0% on GPQA Diamond and 97.6% on FrontierMath Tier 4 — and in operating software, with 92.7% on ScreenSpot-Pro. OpenAI says it gets there with roughly 70% fewer tokens than GPT-5.6 Sol on the same tasks.
It is also the first model OpenAI has rated “Critical” for cybersecurity, and it went to defensive-security programmes first. It always reasons, from low to max effort. A week after it launched, GPT-6.1 Sol came within a point or two of it on most agent tests at a fraction of the price, so try Sol before you pay for Astra.
Where it’s strong
Advanced maths and science problems.
The hardest end-to-end agent tasks.
Operating software through its interface — reading screens, clicking, typing.
Problems where a cheaper model’s answer is not good enough.
Where to be careful
Slower to answer than the Sol and Luna tiers, and it cannot be told not to reason.
On Humanity’s Last Exam it trails Claude Fable 5.1, 57.2% against 65.0%.
GPT-6.1 Sol matches it on many agent tasks at a much lower rate. Test both.
Price
For scale: 1,000 requests of about 3,000 tokens in and 1,000 out cost $92.00 — a long prompt and a page of answer each. Every rate is published and stays the same from one request to the next. See every model.
Specs
gpt-6-astraCall it
Use the OpenAI SDK you already have — point it at Roar AI and name the model. Read the docs.
from openai import OpenAI
client = OpenAI(base_url="https://api.roar-ai.com/v1", api_key="roar_live_…")
reply = client.chat.completions.create(
model="gpt-6-astra",
messages=[{"role": "user", "content": "Summarise this contract in plain English."}],
)Compare GPT-6 Astra
Questions
How much does GPT-6 Astra cost?
Input is $11.50 per 1M tokens; output is $57.50 per 1M tokens. For scale, 1,000 requests of about 3,000 tokens in and 1,000 out cost $92.00. The rate is published and does not change from one request to the next.
Can I use GPT-6 Astra alongside other models?
Yes. Every model on Roar AI is on the same API key and the same monthly invoice, so switching from GPT-6 Astra to another model is a change to one word in your code.
Is GPT-6 Astra open source?
No. OpenAI does not publish the weights, so it is only available through an API like this one.