Chat with leading AI models, free
Pick a provider to learn more and start chatting in your browser. No setup, no API keys. Streaming answers with syntax-highlighted code.
Updated June 2026
Which model should I use?
If you’re not sure, start with GPT — it’s a strong all-rounder. Reach for Claude when you’re doing serious coding or working with long files, and DeepSeek or Qwen when you want capable coding without a premium plan. Kimi is the one to pick for very long inputs, and Grok has a fast variant aimed at quick code. Switching between them takes one click, so you can try the same question on a few.
Models at a glance
| Provider | Good for | Free |
|---|---|---|
| GPT (OpenAI) | OpenAI's GPT models. A solid all-rounder for writing, working through problems, and code. | Free + premium |
| Claude | Anthropic's Claude. Popular with developers for code and clear, careful answers. | Premium |
| Gemma | Google's Gemma. A light open model, quick and free. | Free |
| DeepSeek | DeepSeek. A lot of capability for the cost, especially on code and math. | Free + premium |
| Kimi | Moonshot AI's Kimi. Built to handle very long inputs. | Free |
| Grok | xAI's Grok. Conversational, with a fast coding variant. | Free |
| Qwen | Qwen. Strong on code and multilingual tasks. | Free |
| Llama | Meta's Llama. Open weights, quick answers. | Free |
Frequently asked questions
Is it free to chat with these AI models?
Most models are free to use, within daily limits. A few premium models (like GPT 5.5 and Claude Opus) need a paid plan.
Which AI model is best for coding?
Claude and DeepSeek are strong for code, and GPT is a versatile all-rounder. You can switch models in one click, so it's easy to compare them on the same question.
Do I need to sign up or bring an API key?
You sign in to OneCompiler to start chatting and to save your history. You don't need accounts or API keys with the model providers.
Can I run the code these models write?
Yes. Copy any code block, or paste it into the OneCompiler editor to run it in the browser across 110+ languages.