Nex-N2-Mini and Mistral Small 4 are available through the OpenRouter API, so switching between them takes a model slug change rather than a new integration.
Nex-N2-Mini, from nex-agi, has a 262,144-token context window and is priced at $0.025/M tokens input, $0.10/M tokens output on OpenRouter.
Mistral Small 4, from Mistral AI, has a 262,144-token context window and is priced at $0.15/M tokens input, $0.60/M tokens output on OpenRouter.