KAT-Coder-Pro V2.5 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.
KAT-Coder-Pro V2.5, from kwaipilot, has a 256,000-token context window and is priced at $0.74/M tokens input, $2.96/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.