zen: m2.1 and glm4.7 free models

Author: fwang

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

@@ -82,7 +82,9 @@ You can also access our models through the following API endpoints.
 | 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`            |
 | MiniMax M2.1       | minimax-m2.1       | `https://opencode.ai/zen/v1/chat/completions`      | `@ai-sdk/openai-compatible` |
+| MiniMax M2.1 Free  | minimax-m2.1-free  | `https://opencode.ai/zen/v1/messages`              | `@ai-sdk/anthropic`         |
 | GLM 4.7            | glm-4.7            | `https://opencode.ai/zen/v1/chat/completions`      | `@ai-sdk/openai-compatible` |
+| GLM 4.7 Free       | glm-4.7-free       | `https://opencode.ai/zen/v1/chat/completions`      | `@ai-sdk/openai-compatible` |
 | GLM 4.6            | glm-4.6            | `https://opencode.ai/zen/v1/chat/completions`      | `@ai-sdk/openai-compatible` |
 | Kimi K2.5          | kimi-k2.5          | `https://opencode.ai/zen/v1/chat/completions`      | `@ai-sdk/openai-compatible` |
 | Kimi K2 Thinking   | kimi-k2-thinking   | `https://opencode.ai/zen/v1/chat/completions`      | `@ai-sdk/openai-compatible` |
@@ -113,7 +115,9 @@ We support a pay-as-you-go model. Below are the prices **per 1M tokens**.
 | Model                             | Input  | Output | Cached Read | Cached Write |
 | --------------------------------- | ------ | ------ | ----------- | ------------ |
 | Big Pickle                        | Free   | Free   | Free        | -            |
+| MiniMax M2.1 Free                 | Free   | Free   | Free        | -            |
 | MiniMax M2.1                      | $0.30  | $1.20  | $0.10       | -            |
+| GLM 4.7 Free                      | Free   | Free   | Free        | -            |
 | GLM 4.7                           | $0.60  | $2.20  | $0.10       | -            |
 | GLM 4.6                           | $0.60  | $2.20  | $0.10       | -            |
 | Kimi K2.5                         | $0.60  | $3.00  | $0.10       | -            |
@@ -149,6 +153,8 @@ Credit card fees are passed along at cost (4.4% + $0.30 per transaction); we don
 
 The free models:
 
+- GLM 4.7 is currently free on OpenCode for a limited time. The team is using this time to collect feedback and improve the model.
+- MiniMax M2.1 is currently free on OpenCode for a limited time. The team is using this time to collect feedback and improve the model.
 - Big Pickle 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.
 
 <a href={email}>Contact us</a> if you have any questions.
@@ -178,6 +184,8 @@ charging you more than $20 if your balance goes below $5.
 
 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:
 
+- GLM 4.7: During its free period, collected data may be used to improve the model.
+- MiniMax M2.1: During its free period, collected data may be used to improve the model.
 - Big Pickle: 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).