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GLOSSARY · T

What Is Time to First Token (TTFT)?

DEFINITION

The time taken by an AI model to produce the first token in a response is called Time to First Token (TTFT). This is an important metric when assessing the performance of large language models (LLMs).

Lower TTFT means that the start of a response from the AI will be quicker to receive. TTFT is important to consider when using your AI in applications requiring real-time responses such as chatbots, coding assistants, virtual agents or enterprise AI.

Why is Time to First Token (TTFT) Important?

  • Determines how fast your AI begins responding
  • Improves the user experience for conversational AI applications
  • Helps to assess the performance of LLMs
  • Allows you to compare different models and deployments

Where can Time to First Token (TTFT) be used?

  • Chatbot response times
  • Assessing enterprise AI assistants
  • Optimizing LLM inference
  • Compare performance of AI models across clouds and private

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