Ling-3.0-flash and Step 3.7 Flash are available through the OpenRouter API, so switching between them takes a model slug change rather than a new integration.
Ling-3.0-flash, from inclusionai, has a 262,144-token context window and is priced at $0.021/M tokens input, $0.063/M tokens output on OpenRouter.
Step 3.7 Flash, from stepfun, has a 262,144-token context window and is priced at $0.20/M tokens input, $1.15/M tokens output on OpenRouter.