GPT-6 Astra API

OpenAI's most capable model, built for agentic and computer-use work

Modalities: Image, TextText
In / Out price: $10/$50per 1M
Context window: 1.05M tokens
Released: Sep 3, 2026

GPT-6 Astra overview

GPT-6 Astra by OpenAI

Send text and images to the chat completions endpoint and receive text or tool calls back, with reasoning depth set per request.

GPT-6 Astra specs

Model ID: openai/gpt-6-astra
Developer: OpenAI
Context window: 1,050,000 tokens
Max output: 128,000 tokens
Input: Image, Text
Output: Text
API: OpenAI-compatible, base URL https://api.aimlapi.com/v1

What Is GPT-6 Astra API?

GPT-6 Astra is OpenAI's most capable model, released on September 3, 2026 and built for long, end-to-end work: complex reasoning, coding, computer use, research and document creation.

OpenAI describes it as state of the art on computer use, browsing, software engineering, cybersecurity, science and professional work, and it is the first model the company has designated as reaching its “critical” cybersecurity threshold under its preparedness framework.

Availability note: this model is not yet served through AI/ML API. This page is published ahead of integration; pricing and the endpoint will be filled in once it goes live.

Technical Reference

Developer	OpenAI
Model ID	gpt-6-astra (OpenAI); AI/ML API id to be confirmed on release
Release Date	September 3, 2026
Context Window	1,050,000 tokens
Max Output Tokens	128,000 tokens
Knowledge Cutoff	April 30, 2026
Modalities	Image, Text → Text
Capabilities	function calling, reasoning (configurable effort), streaming, structured outputs, vision, web search, prompt caching

What GPT-6 Astra Brings to the Table

Computer use
OpenAI reports the model can work through spreadsheets, fill in forms and navigate across web pages, often faster than a person doing the same task.

Very long context
A 1,050,000-token context window with up to 128,000 output tokens, so entire codebases or document sets fit in a single request.

Configurable reasoning
Depth of reasoning is controlled per request through the reasoning.effort parameter rather than by switching models.

Positioned as a generational step
OpenAI president Greg Brockman called it a “generational leap” that may eventually be seen as the arrival of AGI, a claim from the vendor, not an independent benchmark result.

Where GPT-6 Astra Makes the Most Sense

Agentic and computer-use workflows
Tasks that span many steps across real applications and web pages rather than a single prompt and answer.

Large-codebase software engineering
The context window and coding focus suit whole-repository work and long refactors.

Research and document production
Long-form synthesis over large source sets, with web search and file search available as tools.

Sources: https://openai.com/index/gpt-6-astra/ · https://developers.openai.com/api/docs/models/gpt-6-astra · https://www.axios.com/2026/09/03/openai-astra-gpt-6-agi-brockman

Use cases

GPT-6 Astra is suited to complex reasoning, coding, computer use, research, and document creation.

It is documented as useful for software development, code generation, and repository analysis.

It is also documented for research, knowledge discovery, and information synthesis.

Another stated use case is computer-use and task execution across applications, including workflow automation with tools, agents, and connected systems.

Capabilities

Function calling
Reasoning
Streaming
Structured outputs
Vision
File input

GPT-6 Astra benchmarks by Artificial Analysis

See how GPT-6 Astra compares in intelligence, generation speed and cost per task. Data retrieved Nov 3, 2026.

Intelligence#3 / 5056.9Index v5.0 Speed#147 / 21972.5Output tokens / second Cost per task#39 / 44$6.24USD / benchmark task Humanity's Last Exam#7 / 45854.7%Score

Benchmark results

Compare 9 models available on AI/ML API across 5 independent benchmarks.

Humanity's Last Exam

Expert-written questions across academic subjects.

GPT-6 Astra API pricing

GPT-6 Astra pricing in US dollars
Usage	Price	Unit
Input	$10	1M tokens
Output	$50	1M tokens
Cached input	$1	1M tokens

Prices from the AI/ML API price list, checked on Nov 4, 2026.

GPT-6 Astra vs other models: token prices

AI/ML API input and output rates for 5 models, per million tokens.

AI/ML API model prices in USD per million tokens
Model	Input	Output
GPT-6 Astra	$10	$50
GPT-6 Luna	$0.1	$0.5
GPT-6.1 Terra	$1	$5
GPT-6.1 Sol	$2	$10
GPT-6.1 Terra Pro	$2.12	$10.58

How to use the GPT-6 Astra API

View docs

Build with your agent

Give your agent the model details, code and documentation.

1Get your API key

Create API key

export AIMLAPI_KEY="8f2b4c7d9a1e6b3f…"

2Make your first request

curl 'https://api.aimlapi.com/v1/chat/completions' \
  -H "Authorization: Bearer $AIMLAPI_KEY" \
  -H 'Content-Type: application/json' \
  -d '{
  "model": "openai/gpt-6-astra",
  "messages": [
    {
      "role": "user",
      "content": "Write a haiku about the ocean."
    }
  ]
}'

import os
import requests

headers = {
    "Authorization": f"Bearer {os.environ['AIMLAPI_KEY']}",
    "Content-Type": "application/json",
}
payload = {
    "model": "openai/gpt-6-astra",
    "messages": [
        {
            "role": "user",
            "content": "Write a haiku about the ocean."
        }
    ]
}

response = requests.post("https://api.aimlapi.com/v1/chat/completions", headers=headers, json=payload, timeout=120)
response.raise_for_status()
print(response.json())

const response = await fetch("https://api.aimlapi.com/v1/chat/completions", {
  method: "POST",
  headers: {
    Authorization: `Bearer ${process.env.AIMLAPI_KEY}`,
    "Content-Type": "application/json",
  },
  body: JSON.stringify({
    "model": "openai/gpt-6-astra",
    "messages": [
      {
        "role": "user",
        "content": "Write a haiku about the ocean."
      }
    ]
  }),
});

if (!response.ok) throw new Error(`HTTP ${response.status}`);
console.log(await response.json());

GPT-6 Astra FAQ

What is the context window of GPT-6 Astra?

GPT-6 Astra has a 1,050,000 tokens context window and can return up to 128,000 tokens.

What inputs and outputs does GPT-6 Astra support?

GPT-6 Astra takes image, text as input and returns text.

What is the model ID for GPT-6 Astra?

Use openai/gpt-6-astra as the model id. Requests go to https://api.aimlapi.com/v1/chat/completions.

When was GPT-6 Astra released?

GPT-6 Astra became available on September 3, 2026.

How much does GPT-6 Astra cost?

GPT-6 Astra costs $10 input and $50 output per 1M tokens on AI/ML API, billed as you go with no subscription.

Does GPT-6 Astra support streaming?

Yes, GPT-6 Astra can stream responses as they are generated.

Can GPT-6 Astra read images?

Yes, GPT-6 Astra accepts image input alongside text.

Who created GPT-6 Astra?

GPT-6 Astra was built by OpenAI.

Does GPT-6 Astra produce images, video, or audio output?

No. It accepts image and text input but only outputs text.

Can I access GPT-6 Astra through an API?

Yes, it is available via the endpoint https://api.aimlapi.com/v1/chat/completions.

Start building with GPT-6 Astra

Get API key

GPT-6 Astra API

openai/gpt-6-astra

Build with your agent

Give your agent the model details, code and documentation.

1Get your API key

Create API key

export AIMLAPI_KEY="8f2b4c7d9a1e6b3f…"

2Make your first request

curl 'https://api.aimlapi.com/v1/chat/completions' \
  -H "Authorization: Bearer $AIMLAPI_KEY" \
  -H 'Content-Type: application/json' \
  -d '{
  "model": "openai/gpt-6-astra",
  "messages": [
    {
      "role": "user",
      "content": "Write a haiku about the ocean."
    }
  ]
}'

import os
import requests

headers = {
    "Authorization": f"Bearer {os.environ['AIMLAPI_KEY']}",
    "Content-Type": "application/json",
}
payload = {
    "model": "openai/gpt-6-astra",
    "messages": [
        {
            "role": "user",
            "content": "Write a haiku about the ocean."
        }
    ]
}

response = requests.post("https://api.aimlapi.com/v1/chat/completions", headers=headers, json=payload, timeout=120)
response.raise_for_status()
print(response.json())

const response = await fetch("https://api.aimlapi.com/v1/chat/completions", {
  method: "POST",
  headers: {
    Authorization: `Bearer ${process.env.AIMLAPI_KEY}`,
    "Content-Type": "application/json",
  },
  body: JSON.stringify({
    "model": "openai/gpt-6-astra",
    "messages": [
      {
        "role": "user",
        "content": "Write a haiku about the ocean."
      }
    ]
  }),
});

if (!response.ok) throw new Error(`HTTP ${response.status}`);
console.log(await response.json());

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GPT-6 Astra API

GPT-6 Astra overview

GPT-6 Astra by OpenAI

GPT-6 Astra specs

What Is GPT-6 Astra API?

Technical Reference

What GPT-6 Astra Brings to the Table

Where GPT-6 Astra Makes the Most Sense

Use cases

Capabilities

GPT-6 Astra benchmarks by Artificial Analysis

Intelligence

Speed

Cost per task

Benchmark results

Humanity's Last Exam

GPQA Diamond

Terminal-Bench 4.0

AA-LCR

SciCode

GPT-6 Astra API pricing

GPT-6 Astra vs other models: token prices

How to use the GPT-6 Astra API

Build with your agent

1Get your API key

2Make your first request

GPT-6 Astra FAQ

Start building with GPT-6 Astra

GPT-6 Astra API

Build with your agent

1Get your API key

2Make your first request

GPT-6 Astra API

GPT-6 Astra overview

GPT-6 Astra by OpenAI

GPT-6 Astra specs

What Is GPT-6 Astra API?

Technical Reference

What GPT-6 Astra Brings to the Table

Where GPT-6 Astra Makes the Most Sense

Use cases

Capabilities

Intelligence

Speed

Cost per task

Benchmark results

Humanity's Last Exam

GPQA Diamond

Terminal-Bench 4.0

AA-LCR

SciCode

GPT-6 Astra API pricing

GPT-6 Astra vs other models: token prices

How to use the GPT-6 Astra API

Build with your agent

1Get your API key

2Make your first request

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Start building with GPT-6 Astra