The unified API for
free frontier models.

Deploy Claude 4.8, ChatGPT 5.5, Grok 4.3, Kimi K2.7, and Gemini 3.5 through a single, lightning-fast endpoint. Sign up today and get instant free upto $5 credits to test 100+ cutting-edge models.

Use Top Models for Free OpenAI SDK Compatible No Credit Card Needed Get Upto $5 Free Credits
Claim Free Credits Now Explore 100+ Free Models 
// Open AI Compatible API
import { OpenAI } from 'openai';

const openai = new OpenAI({
  baseURL: 'https://helyxai.space/api/v1',
  apiKey: 'hx-your-free-key'
});

const response = await openai.chat.completions.create({
  model: 'chatgpt-5.5-omni', // Or 'claude-4.8-opus'
  messages: [{ role: 'user', content: 'Write a web app...' }]
});
Claude 4.8
Fable 5
ChatGPT 5.5
Gemini 3.5
Kimi K2.7
Qwen 3.7
Grok 4.3
MiniMax M3
Grok Build 0.1
Gemma 4
GLM 5
Claude 4.8
Fable 5
ChatGPT 5.5
Gemini 3.5
Kimi K2.7
Qwen 3.7
Grok 4.3
MiniMax M3
Grok Build 0.1
Gemma 4
GLM 5
Claude 4.8
Fable 5
ChatGPT 5.5
Gemini 3.5
Kimi K2.7
Qwen 3.7
Grok 4.3
MiniMax M3
Grok Build 0.1
Gemma 4
GLM 5
100%
Free API Credits on Signup
100+
Free Models Available
0.0
No Credit Card Required
<50ms
Global Edge Latency

Use Top AI Models.

Your HelyxAI account comes pre-loaded with API credits. Stop paying multiple subscriptions and access all flagship models universally.

ChatGPT Logo

Use ChatGPT 5.5 Most Popular

Skip the monthly ChatGPT Plus subscription. Use your HelyxAI credits to integrate ChatGPT 5.5 directly into your apps. Benefit from OpenAI's most advanced omni-model capabilities for coding, reasoning, and vision tasks at zero initial cost.

Claude Logo

Use Claude 4.8 Best for Writing

Access Anthropic's flagship Claude 4.8 API. Known for its unmatched long-context retention and human-like writing, Claude 4.8 is fully accessible using our unified endpoint. Just swap the model string to `claude-4.8-opus` and start generating.

Gemini & Grok Logos

Use Gemini 3.5 & 100+ other models New Models

Need extreme speed or massive context windows? Use Gemini 3.5 for processing entire codebases in a single prompt, or Grok 4.3 for witty, unfiltered reasoning and all other 100+ are included in your API credit pool. No credit card required.

One API Key. 100+ Models.

Use your balance on any of these industry-leading models instantly.

Claude 4.8
Anthropic's most intelligent model yet. Unmatched reasoning and human-like text generation.
Available
ChatGPT 5.5
OpenAI's flagship omni-model. Superior general knowledge, coding capabilities, and speed.
Available
Gemini 3.5
Google's massive context model. Analyze entire codebases or huge datasets in a single prompt.
Available
Grok 4.3
xAI's latest frontier model with up-to-date knowledge and a uniquely unfiltered processing engine.
Available
Fable 5
State-of-the-art open model specializing in creative writing, narrative generation, and storytelling.
Available
Qwen 3.7
Alibaba's highly efficient open-source model. Excellent multilingual capabilities and logic reasoning.
Available
Kimi K2.7
Incredibly fast and efficient context processing model out of Moonshot AI. Perfect for rapid tasks.
Available
View all 100+ Models

Simple Integration. Start in Seconds.

1. Create Free Account

Register in seconds without entering a credit card. Your account is instantly credited with a free developer API balance to test ChatGPT 5.5, Claude 4.8, and more.

2. Update your Base URL

Since we strictly follow the OpenAI specification, you don't need to rewrite your code. Just change your client's base URL to `https://helyxai.space/api/v1`.

3. Specify your Free Model

Change the `model` parameter in your request body to any of our 100+ identifiers (e.g., `chatgpt-5.5-omni` or `claude-4.8-opus`). Enjoy premium AI entirely for free.

Frequently Asked Questions

Everything you need to know about using AI models for free.

How do I use ChatGPT 5.5 for free?
Sign up for a free HelyxAI account to receive instant free API credits. Use these credits to call the ChatGPT 5.5 model directly through our OpenAI-compatible endpoint.
Can I use Claude 4.8 for free?
Yes! Your free HelyxAI credits can be applied to any of our 100+ models, including the latest Claude 4.8, without entering a credit card.
Which AI models are included in the free tier?
Your free balance gives you full access to ChatGPT 5.5, Claude 4.8, Gemini 3.5, Fable 5, Qwen 3.7, Grok 4.3, Kimi K2.7, and many more.
Do I need to change my code?
No. HelyxAI is strictly compatible with the official OpenAI SDKs. You simply change the base_url to ours and use your Helyx API key.

Build with Claude 4.8 & ChatGPT 5.5.
For Free.

Join thousands of developers routing their traffic through HelyxAI to access frontier models without the heavy subscription costs.

Get Free Credits View Supported Models

Instant setup. No credit card required.