2 new free AI models with a 2 million context window

Sonoma Dusk and Sky

OpenRouter just announced 2 new stealth AI models with a massive 2 million context window.

The models are called “Sonoma Dusk Alpha” and “Sonoma Sky Alpha”:

Both models are free to use during the “alpha” period. You can use them:

a) By using the Kilo Code provider (look for openrouter/sonoma-sky-alpha and openrouter/sonoma-dusk-alpha). If you get rate limited, try b)

b) If you get rate limit errors using the Kilo Code provider, or prefer to use OpenRouter directly, just use your OpenRouter API key directly in the Kilo Code extension.

Who is behind Sonoma?

Speculations are running wild.

Some people have spotted patterns suggesting that Sonoma might be similar to Gemini 2.5 Pro:

…while some people found some evidence that the model is owned by Grok:

We did our own experiment where we went to OSChat, which is offering the latest OpenRouter models as a chat interface. We chose Sonoma Dusk Alpha and asked:

Oak AI was unfamiliar to us, so we followed up with a question.