GPT-6 Astra
OpenAI's first GPT-6 model and the flagship above the GPT-5.6 family, aimed at long end-to-end work: computer use, software engineering, professional tasks and science.
Key Specifications
- Context window
- 1M tokens
- Max output
- 128K tokens
- Knowledge cutoff
- web search available
- Released
- Inputs
- Text, image
- Capabilities Show details
- Reasoning Thinks before it answers, always on or as a switchable mode. Function calling Connect to external tools, APIs, and systems. Structured output Return responses in structured formats like JSON. Web search Search the web for up-to-date information. Code execution Write and execute code in a sandboxed environment. File upload Process uploaded documents, spreadsheets, and other files. MCP Connect to services via Model Context Protocol.
Hosted API pricing
| Provider | Input / 1M tokens | Output / 1M tokens | Cached input / 1M | Cost at 10M in + 2M out | |
|---|---|---|---|---|---|
|
OpenAI
Creator
|
$10.00 | $50.00 | $1.00 | $200.00 | View |
Heads up: Base-tier, on-demand rates per 1M tokens; cached, batch and long-context tiers excluded. A provider may serve a shorter context or a quantized build than the creator's release. Verify before provisioning. More on how we price.
Similarly priced models
The models nearest GPT-6 Astra by blended rate, each at its own cheapest provider.
| Model | Blended / 1M | Input / 1M | Output / 1M | Context | Cutoff | vs GPT-6 Astra |
|---|---|---|---|---|---|---|
Claude Opus 4.8
Anthropic
|
$8.3333 | $5.00 | $25.00 | 1M | Jan 2026 | −50% |
|
Claude Opus 5
Anthropic
|
$8.3333 | $5.00 | $25.00 | 1M | May 2026 | −50% |
|
GPT-5.5
OpenAI
|
$9.1667 | $5.00 | $30.00 | 1M | Dec 2025 | −45% |
|
Claude Fable 5
Anthropic
|
$16.6667 | $10.00 | $50.00 | 1M | Jan 2026 | 0% |
|
Claude Fable 5.1
Anthropic
|
$16.6667 | $10.00 | $50.00 | 1M | Jun 2026 | 0% |
|
GPT-6 Astra
This model
OpenAI
|
$16.6667 | $10.00 | $50.00 | 1M | Apr 2026 | |
|
o3-pro
OpenAI
|
$30.00 | $20.00 | $80.00 | 200K | Jun 2024 | +80% |
|
GPT-5 Pro
OpenAI
|
$32.50 | $15.00 | $120.00 | 400K | Sep 2024 | +95% |
|
GPT-5.2 Pro
OpenAI
|
$45.50 | $21.00 | $168.00 | 400K | Aug 2025 | +173% |
|
GPT-5.4 Pro
OpenAI
|
$55.00 | $30.00 | $180.00 | 1M | Aug 2025 | +230% |
|
GPT-5.5 Pro
OpenAI
|
$55.00 | $30.00 | $180.00 | 1M | Dec 2025 | +230% |
Prices are USD per 1M tokens at each model's cheapest listed provider. Blended is the cost of 10M input plus 2M output tokens, spread over the 12M.
Frequently Asked Questions
What is GPT-6 Astra good for?
Long, end-to-end agent work: computer use, software engineering, professional tasks and science, with OpenAI's full hosted tool set. Reasoning effort is adjustable from low up to a max setting.
When is GPT-6 Astra not a good fit?
Budget-sensitive or high-volume traffic: it is the top of OpenAI's price range, where the GPT-5.6 Terra and Luna tiers are the volume options. No audio or video input, and closed weights, so no self-hosting.
What is the cheapest way to run GPT-6 Astra?
The cheapest hosted rate is $10.00 / $50.00 per 1M tokens via OpenAI.
How does GPT-6 Astra compare with GPT-5.6 Sol?
Same 1M-token context and text and image input. GPT-6 Astra lists at 150% more per 1M input tokens and 150% more per 1M output tokens than GPT-5.6 Sol. It came out 2 months later and has a newer knowledge cutoff (April 2026 against February 2026).
Can I self-host GPT-6 Astra?
No. OpenAI does not publish the weights; GPT-6 Astra is available only through hosted APIs.
More from OpenAI
| Model | Context | Input / 1M | Output / 1M |
|---|---|---|---|
|
o3-deep-research
|
200K | $10.00 | $40.00 |
|
GPT-4 Turbo
|
128K | $10.00 | $30.00 |
|
o1
|
200K | $15.00 | $60.00 |
|
o3-pro
|
200K | $20.00 | $80.00 |
|
GPT-5.5
|
1M | $5.00 | $30.00 |
|
GPT-5 Pro
|
400K | $15.00 | $120.00 |
|
GPT-4
|
8K | $30.00 | $60.00 |
|
GPT-5.2 Pro
|
400K | $21.00 | $168.00 |