Laguna XS 2.1 and Solar Pro 4 are available through the OpenRouter API, so switching between them takes a model slug change rather than a new integration.
Laguna XS 2.1, from poolside, has a 262,144-token context window and is priced at $0.06/M tokens input, $0.12/M tokens output on OpenRouter.
Solar Pro 4, from upstage, has a 524,288-token context window and is priced at $0.03/M tokens input, $0.12/M tokens output on OpenRouter.