Overview
GPT-6 Astra Pro vs Union Alpha: side-by-side summary
GPT-6 Astra Pro and Union Alpha are available through the OpenRouter API, so switching between them takes a model slug change rather than a new integration.
GPT-6 Astra Pro, from OpenAI, has a 1,050,000-token context window and is priced at $10/M tokens input, $50/M tokens output on OpenRouter.
Union Alpha, from Stealth, has a 262,144-token context window and is free to use on OpenRouter.
- Context window
- GPT-6 Astra Pro: 1,050,000 tokens
- Union Alpha: 262,144 tokens
- Price
- GPT-6 Astra Pro: $10/M tokens input, $50/M tokens output
- Union Alpha: Free
- Provided by
- GPT-6 Astra Pro: OpenAI
- Union Alpha: Stealth