GPT-6 Astra ProvsHy4 Preview
Hy4 Preview is cheaper than GPT-6 Astra Pro at $0.834/M vs $10/M input tokens.
| Spec | GPT-6 Astra Pro | Hy4 Preview |
|---|---|---|
| Input price | $10/M tokens | $0.834/M tokens |
| Output price | $50/M tokens | $2.501/M tokens |
| Context window | 1.1M tokens | 1.0M tokens |
| Weights | Closed | — |
| Free API (OpenRouter) | No | No |
| Released | Sep 2026 | Aug 2026 |
Our Verdict
GPT-6 Astra Pro
Hy4 Preview
Not enough votes to call it. On the specs, nothing separates them.
Hy4 Preview costs 20x less per token.
Too close to call
Reviewing agent-written code?See a Brief PR report
API pricing
Cost per 1M tokens
GPT-6 Astra Pro
Input
$10.00
Output
$50.00
Hy4 Preview
Input
$0.83
12× cheaper
Output
$2.50
20× cheaper
Hy4 Preview is cheaper on both: 12× input, 20× output.
Where to run it
3 hosts
GPT-6 Astra Pro2 hosts
Hy4 Preview1 host
Per million tokens. Prices and uptime via OpenRouter, checked 13 Sep 2026.
Research
What we learned reading every model
FAQ
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