Nex-N2.5-Pro and GLM 5.3 are available through the OpenRouter API, so switching between them takes a model slug change rather than a new integration.
Nex-N2.5-Pro, from nex-agi, has a 262,144-token context window and is priced by the provider serving it on OpenRouter.
GLM 5.3, from Z.ai, has a 1,310,720-token context window and is priced at $1.113/M tokens input, $3.498/M tokens output on OpenRouter.