Use NovaPAI in Java — OpenAI-compatible API gateway for DeepSeek V4 Pro & 50+ LLMs. Change one line of code, switch to any model.
NovaPAI is an OpenAI-compatible API gateway that gives you access to top-tier LLMs like DeepSeek V4 Pro, GPT-4, Claude, Gemini (50+ models) through the standard OpenAI SDK. If you know how to use the OpenAI API, you already know how to use NovaPAI — just change the base_url.
Sign up at novapai.ai to get your free API key.
<!-- see pom.xml -->
git clone https://github.com/NovaStackAI/novapai-java.git cd novapai-java export NOVAPAI_API_KEY="your-api-key" javac NovaPAIExample.java && java NovaPAIExample
All examples are in NovaPAIExample.java:
| # | Example | Description |
|---|---|---|
| 1 | Basic Chat | Single-turn chat completion |
| 2 | Streaming | Real-time token-by-token output |
| 3 | Multi-turn Conversation | Context-aware multi-message dialogue |
| 4 | Function Calling | Define tools, let the model decide which to call |
| 5 | JSON Mode | Structured JSON output for data extraction |
| 6 | List Models | Fetch all available models |
# Standard OpenAI SDK — just change base_url! from openai import OpenAI client = OpenAI( api_key="your-novapai-key", base_url="https://api.novapai.ai/router/v1" # ← Only this line changes! ) response = client.chat.completions.create( model="deepseek-v4-pro", messages=[{"role": "user", "content": "Hello!"}] ) print(response.choices[0].message.content)
That's it. The OpenAI SDK you already know works directly with NovaPAI. No new SDK to learn, no new API surface.
- ✅ OpenAI-Compatible — Use any OpenAI SDK in any language
- ✅ 50+ Models — DeepSeek V4 Pro, GPT-4, Claude, Gemini and more
- ✅ One API Key — All models, one account
- ✅ No Vendor Lock-in — Switch models with one line change
- ✅ Free Tier Available — Start building with free credits
Browse all our SDK examples:
- novapai-python
- novapai-javascript
- novapai-typescript
- novapai-go
- novapai-rust
- novapai-csharp
- novapai-php
- novapai-ruby
- novapai-curl
Made with ❤️ by NovaStackAI