Seed 1.6 and Rnj 1 Instruct are available through the OpenRouter API, so switching between them takes a model slug change rather than a new integration.
Seed 1.6, from bytedance-seed, has a 262,144-token context window and is priced at $0.25/M tokens input, $2/M tokens output on OpenRouter.
Rnj 1 Instruct, from essentialai, has a 32,768-token context window and is priced by the provider serving it on OpenRouter.