General Agents Benchmark

Tau-Bench Retail

τ-Bench Retail - function calling ability benchmark in a retail domain. Measures tool use with developer-defined function schemas.

Category

General Agents

Score type

percent

Scale

100%

higher is better

Models tested

3

What is Tau-Bench Retail?

τ-bench Retail simulates a customer-service agent in a retail business. The model talks to a simulated user and must use the company's tools (orders, refunds, policy rules) to actually solve the customer's problem. Only when the database state ends up exactly right does the task count as solved.

What does it test?

Tau-Bench Retail measures how well a model acts as a general-purpose agent. In detail, it checks:

  • calling tools with correct arguments
  • following written policies while serving the simulated customer
  • multi-turn conversation behaviour (asking, confirming, acting)
  • correct final database results, not just polite replies

How to read the score

The score is accuracy: the percentage of tasks answered or solved correctly. 100% means every task was solved perfectly; higher is better.

Frequently asked questions

What is the Tau-Bench Retail benchmark?

τ-bench Retail simulates a customer-service agent in a retail business. The model talks to a simulated user and must use the company's tools (orders, refunds, policy rules) to actually solve the customer's problem. Only when the database state ends up exactly right does the task count as solved.

What does Tau-Bench Retail test?

Tau-Bench Retail mainly measures how well a model acts as a general-purpose agent. Concretely, it checks: calling tools with correct arguments; following written policies while serving the simulated customer; multi-turn conversation behaviour (asking, confirming, acting).

How is the Tau-Bench Retail score calculated?

The score is accuracy: the percentage of tasks answered or solved correctly. 100% means every task was solved perfectly; higher is better. The declared maximum score of this benchmark is 100.0.

Where do I get Tau-Bench Retail data and scores?

The official source is https://github.com/sierra-research/tau-bench. The official benchmark page/reference is linked on this page. Every score on Open LLM Radar is also available as open data: download the scores JSON (http://open-llm-radar-api:8000/api/v1/benchmarks/tau-bench-retail/scores) or pull it directly from the Open LLM Radar API with any HTTP client.

Model scores 3 models tested

Reset
# Model Score Date Source Verified
1 Qwen3-Next-80B-A3B-Thinking
Qwen
69.6%
10.09.2025 Report Verified
2 GPT-OSS-120B
OpenAI
67.8%
08.08.2025 Report Verified
3 GPT-OSS-20B
OpenAI
54.8%
05.08.2025 Report Verified

What now?

You've seen how models score on Tau-Bench Retail — here's what to do next.