Palmyra X5 and GLM 4.7 Flash are available through the OpenRouter API, so switching between them takes a model slug change rather than a new integration.
Palmyra X5, from Writer, has a 1,040,000-token context window and is priced at $0.60/M tokens input, $6/M tokens output on OpenRouter.
GLM 4.7 Flash, from Z.ai, has a 202,752-token context window and is priced at $0.06/M tokens input, $0.40/M tokens output on OpenRouter.