GPT-5.6 Sol Pro vs Ox Alpha: side-by-side summary

GPT-5.6 Sol Pro and Ox Alpha are available through the OpenRouter API, so switching between them takes a model slug change rather than a new integration.

GPT-5.6 Sol Pro, from OpenAI, has a 1,050,000-token context window and is priced at $2.50/M tokens input, $15/M tokens output on OpenRouter.

Ox Alpha, from Stealth, has a 1,048,576-token context window and is free to use on OpenRouter.

Context window

• GPT-5.6 Sol Pro: 1,050,000 tokens
• Ox Alpha: 1,048,576 tokens

Price

• GPT-5.6 Sol Pro: $2.50/M tokens input, $15/M tokens output
• Ox Alpha: Free

Provided by

• GPT-5.6 Sol Pro: OpenAI
• Ox Alpha: Stealth

• GPT-5.6 Sol Pro model details, providers and pricing
• Ox Alpha model details, providers and pricing