Integrate ProxyAI with JetBrains IDEA for Seamless AI‑Powered Coding

1. Install the ProxyAI Plugin

Ensure your IntelliJ IDEA version is at least 2024.1. Open IntelliJ IDEA → Settings → Plugins → Marketplace, search for ProxyAI, and click Install . Restart IDEA when prompted.

2. Default Configuration

ProxyAI replaces tools such as GitHub Copilot, AI Assistant, Codiumate, and other JetBrains plugins by connecting local or remote models directly to IDEA. The default configuration covers two functional blocks:

Chat – for conversational interactions with the model.

FIM (Fill‑In‑The‑Middle) – for code and text completion.

Each block supports a set of free and paid models. The free models listed below are sufficient for most users: o3-mini (OpenAI) – ✅ gpt-4o (OpenAI) – ✅ gpt-4o-mini (OpenAI) – ✅ claude-3.7-sonnet (Anthropic) – ✅ gemini-pro-2.5 (Google) – ✅ gemini-flash-2.0 (Google) – ✅ qwen-2.5-coder-32b (Fireworks) – ✅ llama-3.1-405b (Fireworks) – ✅ deepseek-r1 (Fireworks) – ✅ deepseek-v3 (Fireworks) – ✅

These models can be selected directly in the ProxyAI settings without additional registration.

3. Configure DeepSeek‑V3 (SiliconFlow) Model

For higher‑quality responses you may use the paid DeepSeek‑V3 model provided by SiliconFlow. Follow these steps:

Open IntelliJ IDEA → Settings → Tools → ProxyAI and choose Custom OpenAI .

Enter your SiliconFlow API key (obtain it from the ProxyAI website under User settings).

Set the chat endpoint URL to https://api.siliconflow.cn/v1/chat/completions.

In the body configuration, set model to deepseek-ai/DeepSeek-V3 (select the model from SiliconFlow’s model marketplace).

For FIM, adjust the endpoint to https://api.siliconflow.cn/v1/completions and keep the body field model pointing to the same DeepSeek‑V3 model. Note that the FIM request must use the model field rather than message, otherwise the API will reject the call.

4. Practical Tips

4.1 Explain

The Explain action generates a natural‑language explanation of the selected code. Configure it under

IntelliJ IDEA → Settings → Tools → ProxyAI → Prompts → Chat Actions → Explain

. If the response is in Chinese, add a translation step in the prompt to obtain English output.

4.2 Find Bug

The Find Bug action scans the selected snippet for potential issues and offers fix suggestions. After reviewing the suggested changes, click Apply to insert them at the cursor position, then use Accept All to commit or Reject All to discard.

Other features such as refactoring and optimization follow the same workflow and can be explored similarly.

5. Quick Demo

After configuration, you can test ProxyAI by selecting a piece of code and invoking the Find Bug or Explain actions. The plugin will display suggestions in a popup; you can merge them with Apply and finalize with Accept All.

References

JetBrains ProxyAI

plugin page: https://plugins.jetbrains.com/plugin/21056-proxy-ai

SiliconFlow FIM user guide: https://docs.siliconflow.cn/cn/userguide/guides/fim