DeepSeek V3.2 Exp and Mercury are available through the OpenRouter API, so switching between them takes a model slug change rather than a new integration.
DeepSeek V3.2 Exp, from DeepSeek, has a 163,840-token context window and is priced at $0.27/M tokens input, $0.41/M tokens output on OpenRouter.
Mercury, from inception, has a 128,000-token context window and is priced by the provider serving it on OpenRouter.