zen: add glm 4.7

Author: Frank

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

@@ -77,6 +77,7 @@ You can also access our models through the following API endpoints.
 | Claude Haiku 3.5  | claude-3-5-haiku  | `https://opencode.ai/zen/v1/messages`              | `@ai-sdk/anthropic`         |
 | Claude Opus 4.5   | claude-opus-4-5   | `https://opencode.ai/zen/v1/messages`              | `@ai-sdk/anthropic`         |
 | Claude Opus 4.1   | claude-opus-4-1   | `https://opencode.ai/zen/v1/messages`              | `@ai-sdk/anthropic`         |
+| GLM 4.7           | glm-4.7-free      | `https://opencode.ai/zen/v1/messages`              | `@ai-sdk/anthropic`         |
 | Gemini 3 Pro      | gemini-3-pro      | `https://opencode.ai/zen/v1/models/gemini-3-pro`   | `@ai-sdk/google`            |
 | Gemini 3 Flash    | gemini-3-flash    | `https://opencode.ai/zen/v1/models/gemini-3-flash` | `@ai-sdk/google`            |
 | GLM 4.6           | glm-4.6           | `https://opencode.ai/zen/v1/chat/completions`      | `@ai-sdk/openai-compatible` |
@@ -110,6 +111,7 @@ We support a pay-as-you-go model. Below are the prices **per 1M tokens**.
 | --------------------------------- | ------ | ------ | ----------- | ------------ |
 | Big Pickle                        | Free   | Free   | Free        | -            |
 | Grok Code Fast 1                  | Free   | Free   | Free        | -            |
+| GLM 4.7                           | Free   | Free   | Free        | -            |
 | GLM 4.6                           | $0.60  | $2.20  | $0.10       | -            |
 | Kimi K2                           | $0.40  | $2.50  | -           | -            |
 | Kimi K2 Thinking                  | $0.40  | $2.50  | -           | -            |