Frontier GPT model for professional reasoning, coding, and multimodal work
GPT-6 Astra Pro by openai is offered by 4 providers on this page. No official API price is listed for it; the prices below come from third-party channels. The lowest paid channel is NanoGPT at $10.00 / $50.00 per 1M. That channel is a third-party gateway, so confirm its availability and rate limits before depending on it.
The context window is 1,050,000 tokens, with an output limit of 128,000 tokens. It supports reasoning, tool use, and structured output. Accepted input modalities are Text, Image, and PDF.
| Provider | Tier | Input | Output | Cache read | Cache write | Context | Output limit | Status |
|---|---|---|---|---|---|---|---|---|
| NanoGPT | Gateway | $10.00 | $50.00 | $1.00 | $12.50 | 1,050,000 | 128,000 | |
| Venice AI openai-gpt-6-astra-pro | Gateway | $10.00 tiered >272K: $20.00 | $50.00 | $1.00 | $12.50 | 1,050,000 | 128,000 | |
| OpenRouter | Gateway | $10.00 tiered >272K: $20.00 | $50.00 | $1.00 | $12.50 | 1,050,000 | 128,000 | |
| Kilo Gateway | Gateway | $10.00 | $50.00 | $1.00 | $12.50 | 1,050,000 | 128,000 |
Sorted by blended price (input×0.75 + output×0.25) asc. The official channel always shows regardless of rank. Whether a gateway's low price is actually usable can't be verified.
Price history accumulates from each data sync; currently only 1 sample(s) (2026-09-05). Each future sync adds a point, and once accumulated a line is drawn here.