What is Task decomposition?
Task decomposition is an agent-design concept in AI systems. It is part of the vocabulary teams use when they compare models, design prompts or review an AI system.
Definition
Task decomposition is an agent-design concept in AI systems. It is part of the vocabulary teams use when they compare models, design prompts or review an AI system. The term is used in agents discussions, where precision matters: two teams can use the same word to mean slightly different things. In this glossary, task decomposition is treated as a practical concept rather than a formal specification.
Why it matters
Agent terms describe how a model plans, calls tools, observes results and decides what to do next. They matter because agent reliability depends as much on control flow and guardrails as on raw model quality.
Example
Suppose you are comparing GPT-5.1 Mini with another model for a production task. Task decomposition is one of the factors behind the numbers you see: GPT-5.1 Mini lists a 128,000-token context window, costs $12.19 per million input tokens and scores 71.4 on GPQA Diamond. Understanding the term helps you decide which of those differences actually matter for your workload.
How to evaluate it
- Check whether task decomposition 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 Task decomposition mean?
Task decomposition is an agent-design concept in AI systems. It is part of the vocabulary teams use when they compare models, design prompts or review an AI system.
Why does Task decomposition matter?
Agent terms describe how a model plans, calls tools, observes results and decides what to do next. They matter because agent reliability depends as much on control flow and guardrails as on raw model quality.
How is Task decomposition used in practice?
Suppose you are comparing GPT-5.1 Mini with another model for a production task. Task decomposition is one of the factors behind the numbers you see: GPT-5.1 Mini lists a 128,000-token context window, costs $12.19 per million input tokens and scores 71.4 on GPQA Diamond. Understanding the term helps you decide which of those differences actually matter for your workload.