Your session has been flagged for unusual activity.
Please confirm you're human to continue.
Meta's family of openly released large language models, influential for bringing strong, locally runnable models to researchers and developers.
Llama, introduced by Touvron et al. (2023), is a series of foundation models released with open weights. The first release showed that models trained on public data could match much larger closed models, and its open availability catalysed a large ecosystem of fine-tuned, on-device and research variants.
Llama is the canonical example of an open-weight model, contrasting with API-only systems like GPT-4, Claude and Gemini.
Primary, peer-reviewed and archival sources for this definition.
Run the same prompt across ChatGPT, Claude, Gemini, Grok and Perplexity side by side — with your own files as context and answers you can cross-check.
Try MultipleChat FreeContinue learning
Use several frontier models together for stronger answers and fewer blind spots.
ComparisonCompare several AI answers side by side when the output matters.
PricingSee the AI subscription that replaces separate ChatGPT, Claude, Gemini, Grok and Perplexity accounts.
Multi-model AIRun the same prompt through available ChatGPT, Claude, Gemini and Grok models and compare their answers.
GuideChoose the best model for writing, research, coding, documents, images and business work.
AlternativeUse ChatGPT alternatives together: Claude, Gemini, Grok, Perplexity, files, web search and creation tools.
