Benchmark definition

τ-bench

SupersededTAU_BENCH

Applicability does not mean evaluated; benchmark result/model score data is outside this UI contract.

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About

Description
τ-bench
What it measures
τ-bench
Comparison guidance
Not published
Intended difficulty
Not published

Not recorded for this benchmark: what it does not measure, why it matters, motivation, gap addressed.

Classification

Categories
Tool UseCustomer Service Agent
Domains

None recorded

Evaluation style

None recorded

Structure

One undivided item set. No components or scenarios recorded.

Tasks

Policy Constrained Conversational Tool Use

Metrics

What a result on this benchmark would be reported as. ctxdex does not carry results.

MetricRoleDirectionUnit
Pass K Reliability
Fraction/probability of tasks succeeding in all k independent trials.
PrimaryHigher is betterPercent

Methodology

None recorded

Evaluation environment

What the benchmark's harness provides and allows. These are properties of the environment, not model requirements, and applicability does not test for them.

Interaction

None. Static prompts and answers.

Evaluation style
Not recorded
Environment summary
Not published

Model requirements

Required conditions decide applicability. Relevant ones describe what the benchmark exercises and decide nothing.

Required · decides applicability

Whole benchmark
Text (input)

Relevant · informational

Tool calling

CTXDEX models

51 of the 58 active, preview, experimental models meet this benchmark’s recorded requirements, at some scope. Applicable means the requirements are met, not that the model was evaluated.

View all 51 applicable models →
Applicable · full
51
Applicable · components
0
Applicable · scenarios
0
Conditionally applicable
0
Not recorded
7

Counted over 58 models in the default lifecycle scope (active, preview, experimental).

Every required condition, for the whole benchmark, is recorded as supported. Each line is one recorded condition and why it counts.

  • Ctxdex Builder 1
    Ctxdex Builder
    Full benchmark

    Every one of the 1 required conditions is recorded as supported.

    • MODALITY:INPUT:TEXTthe catalogue records SUPPORTED for TEXT (input)
  • Ctxdex Code 2
    Ctxdex Code
    Full benchmark

    Every one of the 1 required conditions is recorded as supported.

    • MODALITY:INPUT:TEXTthe catalogue records SUPPORTED for TEXT (input)
Preview holds 12 of 51. View all →

Applicability/relevance ordering only; never a performance ranking.

Scale

  • 50
    Airline
    Total · Exact
  • 115
    Retail
    Total · Exact
  • 165
    Task
    Total · Exact

Data and access

UnknownDataset, evaluation code, leaderboard, peer review and maintenance status are all unrecorded for this benchmark.

Coverage

Languages, regions

None recorded

Coverage summary
Not published

Limitations

None recorded

Lineage

Family
Familyτ-bench
Related
Inverse of successor of Benchmarkτ²-bench
Other definitions in family
Changes

None recorded

Sources

Freshness

Content version
B2-1.0
Last reviewed
2026-09-23
Refresh model
Unknown
Time sensitivity
Unknown
Benchmark data
c40cccac878af5d0

13 contract fields are empty for every benchmark in this release and are not shown: applicability groups, conditional requirements, feature requirements, model relevance domains, required capabilities, openness summary, reference artifacts, interaction protocols, tool protocols, benchmark last major refresh at, short name, target expertise level, target population.