How to use Claude and GPT models with the new Cursor client in mainland China?

When using the new Cursor client in mainland China and encountering issues connecting to Claude or GPT models, you can resolve them by adjusting the network protocol through the following 5 steps:

1.  **Open Settings**: Click the "gear" icon in the bottom-left corner of the Cursor client to enter the system settings interface.

2.  **Search for "http"**: In the search box at the top-left of the settings page, type the keyword "http" to filter the results.

3.  **Open Network Settings**: Among the search results, click to select "Browser & Network" > "HTTP Compatibility Mode".

4.  **Change Protocol to "http1.1"**: In the "Network" configuration area on the right, find the "HTTP Compatibility Mode" option and change the default protocol dropdown menu to "HTTP/1.1".

5.  **Enable Proxy and Restart Cursor**: Ensure your local network proxy software is enabled, then restart the Cursor client to restore the ability to use Claude and GPT models.


## Several Top Models Currently
- As of August 2026

| **Model Name**                  | **Vendor**   | **Core Strengths**                       | **Typical Context Window** | **Vendor Positioning Summary**       |
| ----------------------------- | ------------ | ---------------------------------------- | ------------------ | ---------------------------------- |
| **GPT-5.6 Sol (GPT-5)**       | OpenAI       | General-purpose, multimodal understanding, math & logic reasoning | ~400K              | Benchmark for current comprehensive closed-source large models |
| **Claude Fable 5 / Opus 4.8** | Anthropic    | Deep reasoning, long-form programming agents | 1M (Million-level) | Representative of industry-leading "high IQ" |
| **Claude Sonnet 4.6**         | Anthropic    | Code implementation, structured output, excellent language feel | 1M (Beta)          | Absolute workhorse for daily development and enterprise workflows |