Compare GPT-5.1-Codex-Max from OpenAI and Solar Pro 3 from upstage on key metrics including benchmarks, price, context length, and other model features. Access both models and hundreds of others through the OpenRouter API.
GPT-5.1-Codex-Max and Solar Pro 3 are available through the OpenRouter API, so switching between them takes a model slug change rather than a new integration.
GPT-5.1-Codex-Max, from OpenAI, has a 400,000-token context window and is priced at $1.25/M tokens input, $10/M tokens output on OpenRouter.
Solar Pro 3, from upstage, has a 131,072-token context window and is priced at $0.15/M tokens input, $0.60/M tokens output on OpenRouter.