tau2-bench Verified
Nova 2 Omni Preview 73.5% leads since Dec 2025 Fading Agent serves simulated customers in airline, retail and telecom under policies, with Amazon-fixed faulty tasks from τ²-bench. Pass rate.
Lab-created verified variant (Amazon AGI) of Sierra's τ²-bench. Fixes documented in FIXES.md.
- Level
- Everyday Most adults, without training
- Scored
- Checked automatically A program checks the result against an answer key, unit tests or the expected final state.
- Answers
- Agent task Many steps in a terminal, browser, desktop, app, game or robot.
Nova 2 Omni Preview leads with 73.5% among models released by Dec 2025
Best score per model as labs report them in their own cards. Labs pick their own settings, so these compare less cleanly than independent runs.
The newest model with a score here came out in Dec 2025, and nobody has reported a newer one. Among the 20 highest-ranked models on the capability index, these have no score yet:
- GPT-6 Astra
- Claude Opus 5.5
- GPT-6.1 Terra
- GPT-6.1 Sol
- and 16 more
- 1 Nova 2 Omni Preview 73.5%
- 2 Nova 2.0 Pro Preview 71.5%
- 3 Nova 2 Lite 70.7%
| # | Model | Score | Setting | Date | Source |
|---|---|---|---|---|---|
| 1 | Nova 2 Omni Preview | 73.5% | Dec 2025 | Model card | |
| 2 | Nova 2.0 Pro Preview | 71.5% | Dec 2025 | Model card | |
| 3 | Nova 2 Lite | 70.7% | Dec 2025 | Model card |
Number one over time
Lab claims count from the day the card came out, independent runs from the model’s release.
Scores over time
All the scores we have, one dot each, so a model tested at several settings appears more than once.
Labs headline it less often now, last in Dec 2025
Launch posts from every lab that has listed it, one tick per post. Tall colored ticks include it, and short gray ones leave it out.
| Date | Launch post | Score | As the post writes it |
|---|---|---|---|
| 2 Dec 2025 | Nova 2 Omni Preview | 73.5 | Mean of τ2-bench Retail-Verified 78.3 / Airline-Verified 68.8 |
| 2 Dec 2025 | Nova 2 Lite | 70.7 | Mean of τ2-bench Retail-Verified 76.5 / Airline-Verified 64.8 (avg@3) |
| 2 Dec 2025 | Nova 2.0 Pro Preview | 71.5 | Mean of τ2-bench Retail-Verified 77.7 / Airline-Verified 65.2 (avg@3) |
3 system cards report it, from 1 lab
Besides launch posts, we read the system cards, model cards and technical reports labs publish with a release. They report far more, including safety and frontier-risk tests.
| Date | Document | Score | As the document writes it | Section |
|---|---|---|---|---|
| 2 Dec 2025 | Nova 2 Omni Preview technical report | tau2-bench Retail-Verified 78.3 and Airline-Verified 68.8, no overall (Table 5) | Capabilities | |
| 2 Dec 2025 | Nova 2 Lite technical report | tau2-bench Retail-Verified 76.5 and Airline-Verified 64.8, avg@3, no overall (Table 2) | Capabilities | |
| 2 Dec 2025 | Nova 2.0 Pro Preview technical report | tau2-bench Retail-Verified 77.7 and Airline-Verified 65.2, avg@3, no overall (Table 2) | Capabilities |
More in Tool use
- AutomationBench In use Agent completes end-to-end business workflows inside a simulated company exposing dozens of REST APIs. Graded on resulting state.
Gemini 4 Carbon 53.9% - MCP Atlas In use Multi-step workflows over real MCP servers. Scores tool-use competency on realistic tasks.
Muse Spark 1.1 88.1% - BFCL V4 In use Models call functions and tools, including multi-turn agentic tasks with web search and memory. Checked against expected calls and outcomes.
Qwen3.7-Max 75% - τ³-bench Banking In use Agents act as banking customer-service reps over many turns with a simulated user, following policy. Pass^1 on the final database state. Qwen 3.8 Max 55.1%
- Claw-Eval In use 300 human-verified agent tasks (service orchestration, multimodal, multi-turn dialogue) audited via traces and snapshots. Rubric scores with Pass^3 consistency. Claude Sonnet 4.6 81.4%
- DeepSearchQA In use Questions that need multi-step search and synthesis. Final answers graded against references. Kimi K3 95%