Compare Gemini 2.5 Flash Lite from Google and GPT-5 Codex 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.
Gemini 2.5 Flash Lite and GPT-5 Codex are available through the OpenRouter API, so switching between them takes a model slug change rather than a new integration.
Gemini 2.5 Flash Lite, from Google, has a 1,048,576-token context window and is priced at $0.10/M tokens input, $0.40/M tokens output on OpenRouter.
GPT-5 Codex, from OpenAI, has a 400,000-token context window and is priced by the provider serving it on OpenRouter.