Llama 4 Maverick and Hy4 preview are available through the OpenRouter API, so switching between them takes a model slug change rather than a new integration.
Llama 4 Maverick, from Meta Llama, has a 1,048,576-token context window and is priced at $0.20/M tokens input, $0.80/M tokens output on OpenRouter.
Hy4 preview, from tencent, has a 1,048,576-token context window and is priced at $0.834/M tokens input, $2.501/M tokens output on OpenRouter.