Claude Opus 4.8 and Command R7B (12-2024) are available through the OpenRouter API, so switching between them takes a model slug change rather than a new integration.
Claude Opus 4.8, from Anthropic, has a 1,000,000-token context window and is priced at $5/M tokens input, $25/M tokens output on OpenRouter.
Command R7B (12-2024), from Cohere, has a 128,000-token context window and is priced at $0.0375/M tokens input, $0.15/M tokens output on OpenRouter.