GPT Image 2 and FLUX.2 Max are available through the OpenRouter API, so switching between them takes a model slug change rather than a new integration.
GPT Image 2, from OpenAI, has a 400,000-token context window and is priced at $8/M tokens input, $8/M tokens output on OpenRouter.
FLUX.2 Max, from black-forest-labs, has a 46,864-token context window and is priced at $0.07/megapixel on OpenRouter.