docs: zen

packages/web/src/content/docs/zen.mdx

@@ -81,7 +81,8 @@ We support a pay-as-you-go model. Below are the prices **per 1M tokens**.
 | Model                           | Input  | Output | Cached Read | Cached Write |
 | ------------------------------- | ------ | ------ | ----------- | ------------ |
 | Qwen3 Coder 480B                | $0.45  | $1.50  | -           | -            |
-| Grok Code Fast 1                | Free   | Free   | Free        | -            |
+| Grok Code Fast 1                | Free   | Free   | -           | -            |
+| Code Supernova                  | Free   | Free   | -           | -            |
 | Claude Sonnet 4 (≤ 200K tokens) | $3.00  | $15.00 | $0.30       | $3.75        |
 | Claude Sonnet 4 (> 200K tokens) | $6.00  | $22.50 | $0.60       | $7.50        |
 | Claude Haiku 3.5                | $0.80  | $4.00  | $0.08       | $1.00        |
@@ -93,7 +94,10 @@ We support a pay-as-you-go model. Below are the prices **per 1M tokens**.
 Credit card fees are passed along at cost; we don’t charge anything beyond that.
 :::
 
-Grok Code Fast 1 is currently free on opencode for a limited time. The xAI team is using this time to collect feedback and improve Grok Code.
+The free models:
+
+- Grok Code Fast 1 is currently free on opencode for a limited time. The xAI team is using this time to collect feedback and improve Grok Code.
+- Code Supernova is a stealth model that's free on opencode for a limited time. The team is using this time to collect feedback and improve the model.
 
 :::tip
 Subscription plans and a free tier are coming soon.
@@ -108,6 +112,8 @@ Subscription plans and a free tier are coming soon.
 All our models are hosted in the US. Our providers follow a zero-retention policy and do not use your data for model training, with the following exceptions:
 
 - Grok Code Fast 1: During its free period, collected data may be used to improve Grok Code.
+- Code Supernova: During its free period, collected data may be used to improve
+  the model.
 - OpenAI APIs: Requests are retained for 30 days in accordance with [OpenAI's Data Policies](https://platform.openai.com/docs/guides/your-data).
 - Anthropic APIs: Requests are retained for 30 days in accordance with [Anthropic's Data Policies](https://docs.anthropic.com/en/docs/claude-code/data-usage).