# GPT-6 Astra Pro: AI model fact sheet

- **Provider:** openai
- **Released:** 2026-09-04
- **Context window:** 1,050,000 tokens
- **API pricing:** $10.00 / 1M input, $50.00 / 1M output
- **OpenRouter ID:** openai/gpt-6-astra-pro
- **Capabilities:** conversation, reasoning, code-generation, analysis, agentic-tool-use, function-calling, planning

GPT-6 Astra served with reasoning mode set to pro, which spends a larger thinking budget per request. Same underlying model as GPT-6 Astra, same 1.05M context and 128K output ceiling, aimed at the harder end of coding, analysis and long multi-step work.

Source: real side-by-side outputs, pricing and specs at https://rival.tips/models/gpt-6-astra-pro