Introducing LLM Gateway Chat — Test 180+ Models in One Interface
Compare GPT-5, Claude, Gemini, and 180+ other models side by side. Generate images, test prompts, and find the best model for your use case.
Choosing the right LLM used to mean signing up for multiple accounts, managing different API keys, and switching between interfaces. Not anymore.
LLM Gateway Chat lets you test any model in our catalog—GPT-5, Claude, Gemini, Llama, and 180+ others—from one interface. Compare outputs, test prompts, and find the best model for your use case before writing a single line of code.
Built for Speed
The playground runs on:
- Vercel AI SDK v5 — Real-time streaming with zero lag
- AI Elements — Clean, accessible UI designed for AI workflows
- LLM Gateway's unified API — Switch models with one click, no re-authentication
The result: a fast, responsive interface whether you're chatting with GPT-5 or generating images with Gemini.
Key Features
Image Generation
Select an image model (like gemini-2.5-flash-image-preview), describe what you want, and see results inline. Great for prototyping visual content before integrating image generation into your app.
Smart Model Selection
Finding the right model is half the battle. Filter by:
- Capabilities — Vision, image generation, function calling, reasoning
- Provider — OpenAI, Anthropic, Google, and 20+ others
- Price — Real-time pricing so you can optimize for budget
Search for "cheap vision model" or "best reasoning" and the selector surfaces relevant options instantly.
File Attachments
Drag and drop images or documents into any conversation. Vision models analyze them instantly—useful for testing image understanding before integrating into your app.
Everything You'd Expect
- Streaming responses — Watch the AI think in real-time
- Reasoning display — See extended thinking for models that support it
- Saved history — Every conversation is automatically stored
- Multiple chats — Keep experiments organized by project
- Quick actions — Copy, regenerate, or branch conversations with one click
Coming Soon
- Web Search — Let AI access real-time information
- Custom Tools — Extend AI capabilities with your own integrations
Try It Now
- Go to chat.llmgateway.io
- Sign in with your LLM Gateway account
- Pick a model and start chatting
New here? Sign up free — no credit card, instant access.
More Than a Chat Interface
The playground is a development tool. Use it to:
- Test prompts — Try the same prompt across GPT-5, Claude, and Gemini to see which handles it best
- Compare costs — See real-time pricing for each response
- Prototype features — Validate ideas before writing integration code
- Debug issues — Streaming visibility helps you catch problems early
Every request in the playground appears in your analytics dashboard—same tracking as production traffic.