What is Autoregressive model?
Autoregressive model is an architectural concept in transformer-based language models. It is part of the vocabulary teams use when they compare models, design prompts or review an AI system.
Definition
Autoregressive model is an architectural concept in transformer-based language models. It is part of the vocabulary teams use when they compare models, design prompts or review an AI system. The term is used in architecture discussions, where precision matters: two teams can use the same word to mean slightly different things. In this glossary, autoregressive model is treated as a practical concept rather than a formal specification.
Why it matters
Architecture terms describe how a model represents tokens, moves information between positions and scales with parameters and data. They explain why two models with similar parameter counts can behave very differently.
Example
Suppose you are comparing Phi-4 Base with another model for a production task. Autoregressive model is one of the factors behind the numbers you see: Phi-4 Base lists a 32,768-token context window, costs $3.15 per million input tokens and scores 62.7 on SWE-bench Verified. Understanding the term helps you decide which of those differences actually matter for your workload.
How to evaluate it
- Check whether autoregressive model is defined the same way in the documentation you are reading.
- Ask which measurement or trade-off the term is describing before comparing numbers.
- Separate vendor claims from independently observed behaviour on your own data.
- Write down the definition your team uses so reviews and evaluations stay consistent.
Related terms
Related guides
FAQ
What does Autoregressive model mean?
Autoregressive model is an architectural concept in transformer-based language models. It is part of the vocabulary teams use when they compare models, design prompts or review an AI system.
Why does Autoregressive model matter?
Architecture terms describe how a model represents tokens, moves information between positions and scales with parameters and data. They explain why two models with similar parameter counts can behave very differently.
How is Autoregressive model used in practice?
Suppose you are comparing Phi-4 Base with another model for a production task. Autoregressive model is one of the factors behind the numbers you see: Phi-4 Base lists a 32,768-token context window, costs $3.15 per million input tokens and scores 62.7 on SWE-bench Verified. Understanding the term helps you decide which of those differences actually matter for your workload.