OpenAI
GPT-6 Astra Pro
GPT-6 Astra Pro is the same underlying model as [GPT-6 Astra](https://openrouter.ai/openai/gpt-6-astra), served with `reasoning.mode` set to `pro` for higher-quality responses on complex tasks. Learn more in OpenAI's docs: https://developers.openai.com/api/docs/guides/reasoning#reasoning-mode
Model facts
- Context window
- 1.05M tokens
- Maximum output
- 128K tokens
- Cheapest paid input
- $5 per 1M tokens
- Cheapest paid output
- $25 per 1M tokens
- Open weights
- no
- Providers
- 3
Capabilities and modalities
reasoning, tool calling, structured output, attachments, text, image, pdf.
Observed price history
- 2026-09-05: $5 input / $25 output per 1M tokens
API providers
- OpenRouter (batch) — model id openai/gpt-6-astra-pro:batch; $5 input / $25 output per 1M tokens; provider documentation
- NanoGPT — model id openai/gpt-6-astra-pro; $10 input / $50 output per 1M tokens; provider documentation
- OpenRouter — model id openai/gpt-6-astra-pro; $10 input / $50 output per 1M tokens; provider documentation