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WhatsMyLLM
Identify Your AI Model in Seconds
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Identify Your AI Model in Seconds
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WhatsMyLLM is a free, browser-based tool that compares AI responses to identify the closest match among 24 language models, including GPT, Claude, Gemini, and DeepSeek. No sign-up required—just paste responses and discover your model match.
WhatsMyLLM: Discover Which AI Model You’re Using
Ever wondered which large language model powers your AI conversations? WhatsMyLLM is a free, browser-based tool that helps you identify the AI model your responses most closely resemble. Instead of relying on an AI assistant's self-description, it compares actual responses to standardized test prompts and finds the closest match among 24 candidate models.
How Does WhatsMyLLM Work?
Testing is simple and requires no account or sign-up. Open WhatsMyLLM, copy a test prompt, and paste it into a fresh conversation with the AI you want to evaluate. Copy the model's complete reply and paste it back into the checker. Click “Identify model” to see which candidate most closely matches the response.
You can start with one reply and add up to two more for a fuller comparison. Using multiple responses can provide stronger evidence and help distinguish between models with similar response patterns.
Key Features
24-model comparison bank: Compare responses against models from families such as GPT, Claude, Gemini, Qwen, DeepSeek, and Kimi.
Simple testing workflow: Copy a prompt, collect the full AI response, and paste it into the checker.
No sign-up required: Start testing without creating an account.
Browser-local workflow: Run the paste-based test directly in your browser.
Evidence-based matching: Review the closest model match and information about fit and separation between candidates.
Transparent limitations: Explore the methodology and understand what the results can and cannot establish.
Use Cases
AI Model Identification: Discover which LLM your AI responses most closely resemble.
Model Comparison: Compare response patterns across GPT, Claude, Gemini, DeepSeek, and other supported models.
AI Research: Explore similarities and differences in language model behavior.
Developer Testing: Investigate model outputs when evaluating AI applications and integrations.
AI Tool Verification: Check whether an AI service's responses resemble a model in the supported comparison bank.
AI Education: Learn how LLMs can be compared using standardized prompts and response analysis.
Model Version Exploration: Investigate whether responses resemble a newer model or a related model-family variant.
AI Enthusiast Experiments: Satisfy curiosity about the AI behind everyday chatbot conversations.
What Do the Results Mean?
WhatsMyLLM reports the closest match in its model bank, along with an indication of how clearly that candidate stands apart from alternatives. Its results are statistical comparisons, not definitive identity verification. An unlisted model version may resemble a listed sibling, and response style alone cannot reliably establish a provider, subscription tier, or exact deployment configuration. The tool also does not measure overall answer quality.
Try WhatsMyLLM Today
Stop guessing and start comparing. Visit https://whatsmyllm.com/, run a prompt test, and explore which available model best matches your AI's responses. Begin with one reply or use all three prompts for a more informative comparison—all free, right in your browser.