Muse Spark 1.2 Contributor and DeepSeek V4 Pro 0813 are available through the OpenRouter API, so switching between them takes a model slug change rather than a new integration.
Muse Spark 1.2 Contributor, from Meta, has a 1,048,576-token context window and is priced at $0.10/M tokens input, $0.20/M tokens output on OpenRouter.
DeepSeek V4 Pro 0813, from DeepSeek, has a 1,048,576-token context window and is priced at $0.627/M tokens input, $1.881/M tokens output on OpenRouter.