Compare GPT-5.1-Codex from OpenAI and o4 Mini Deep Research from OpenAI 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 and o4 Mini Deep Research are available through the OpenRouter API, so switching between them takes a model slug change rather than a new integration.
GPT-5.1-Codex, from OpenAI, has a 400,000-token context window and is priced at $1.25/M tokens input, $10/M tokens output on OpenRouter.
o4 Mini Deep Research, from OpenAI, has a 200,000-token context window and is priced by the provider serving it on OpenRouter.