OpenAI
GPT-6 Astra
GPT-6 Astra is OpenAI's flagship model for demanding end-to-end work.
At a glance
- Input / 1M
- $10
- Output / 1M
- $50
- Context
- 1.05M
- Max output
- 128K
- Intelligence
- 52.7
- Released
- Sep 2026
Pricing
GPT-6 Astra API pricing
Per-token rates, plus what common tasks actually cost.
| Input tokensPer 1M tokens | $10 |
|---|---|
| Output tokensPer 1M tokens | $50 |
| Cached input (read)Per 1M tokens | $1 |
| Cache writePer 1M tokens | $12.50 |
| Long-context pricingPrompts above 272K tokens | $20 in / $75 out |
| Web searchPer request | $0.01 |
Chat message
2K in, 500 out
$45
per 1,000 requests
Coding task
30K in, 4K out
$500
per 1,000 requests
Long document summary
150K in, 2K out
$1600
per 1,000 requests
Benchmarks
GPT-6 Astra benchmark scores
Independent scores from Artificial Analysis. Higher is better.
Intelligence index
52.7
Coding index
76.9
Agentic index
51
Specs
Context window and capabilities
What it can read, what it can write, and which API features it supports.
- Context window
- 1.05M tokens
- Max output
- 128K tokens
- Input types
- File, Image, Text
- Output types
- Text
- Reasoning effort
- Max, Extra high, High, Medium, Low
- Release date
- September 4, 2026
- Tool calling
- Structured outputs
- JSON mode
- Reasoning
- Temperature
- Stop sequences
- Deterministic seed
- Verbosity control
Compare
GPT-6 Astra vs other models
See how GPT-6 Astra stacks up head to head on price, benchmarks, and features.
VS
GPT-6 Astra vs Claude Opus 5.5
OpenAI vs Anthropic
See comparisonVSGPT-6 Astra vs Claude Sonnet 5.5
OpenAI vs Anthropic
See comparisonVSGPT-6 Astra vs Claude Fable 5.1
OpenAI vs Anthropic
See comparisonVSGPT-6 Astra vs GPT-6.1 Sol
OpenAI vs OpenAI
See comparisonVSGPT-6 Astra vs Claude Opus 5
OpenAI vs Anthropic
See comparisonVSGPT-6 Astra vs Claude Fable 5
OpenAI vs Anthropic
See comparisonMore GPT-6 Astra comparisons
- GPT-6 Astra vs Muse Spark 1.3
- GPT-6 Astra vs GPT-6 Sol
- GPT-6 Astra vs GPT-5.6 Sol
- GPT-6 Astra vs Grok 4.7
- GPT-6 Astra vs GLM 5.3
- GPT-6 Astra vs Kimi K3
- GPT-6 Astra vs GLM 5.3 Flash
- GPT-6 Astra vs Gemini 3.8 Flash
- GPT-6 Astra vs DeepSeek V4.1 Flash
- GPT-6 Astra vs MiMo-V2.6-Flash
- GPT-6 Astra vs Hy4 preview
- GPT-6 Astra vs GPT-6 Luna
- GPT-6 Astra vs DeepSeek V4 Flash 0731
- GPT-6 Astra vs Gemini 3.1 Pro Preview
Alternatives
GPT-6 Astra alternatives
Similar models worth considering, and where each one has the edge.
Anthropic
Claude Opus 5.5
Anthropic
Claude Sonnet 5.5
Anthropic
Claude Fable 5.1
Want to learn about other models? Browse all models
FAQ
Frequently asked questions
How much does GPT-6 Astra cost?
GPT-6 Astra costs $10 per 1M input tokens and $50 per 1M output tokens through the API. A typical chat message costs about $45 per 1,000 messages.
What is the context window of GPT-6 Astra?
GPT-6 Astra accepts up to 1.05M tokens of input and can write up to 128K tokens in a single response.
What is the best alternative to GPT-6 Astra?
Claude Opus 5.5 from Anthropic is a strong alternative. It offers: 2.5x cheaper output, higher intelligence score, newer release.
Can I use GPT-6 Astra alongside other models?
Yes. Shortcut Chat sends one prompt to GPT-6 Astra and any other models you pick at the same time, so you can compare answers side by side.
Try GPT-6 Astra next to every other model.
Use GPT-6 Astra alongside all the other models. Use one at a time, or multiple together. Get the best answer from every AI.