xbench-DeepSearch-2510

Agents answer 100 new Chinese deep search questions that need many web searches and cross-checks. Answers are matched to a key.

The dataset is encrypted against crawling. Scores are much lower than on the 2505 set, so the two are not comparable.

Made by xbench (HongShan) Released Oct 2025 Deep research All tasks public Last in a launch post Feb 2026 , dropped before it saturated Last model added Feb 2026 Scores refreshed 2 Nov 2026

Level: Expert Specialists with years of training, often over hours of work
Scored: Checked automatically A program checks the result against an answer key, unit tests or the expected final state.
Answers: Short answer A number, word or short string matched to a key.

xbench-ai/xbench-evals 142 stars Dataset Leaderboard xbench.org

Model scored in lab cards

Launch post lists it, from 1 lab

System card reports it, from 1 lab

Step 3.5 Flash leads with 56.3%

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.

Bars Table

56.3 Step 3.5 Flash

1 Step 3.5 Flash 56.3%

#	Model	Score	Setting	Date	Source
1	Step 3.5 Flash	56.3%		Feb 2026	Model card

The benchmark's own leaderboard has 2 models. We plot every source in the charts below.

Scores over time

All the scores we have, one dot each, so a model tested at several settings appears more than once.

On the benchmark’s own leaderboard Reported by the lab in its model card

Labs headline it less often now, last in Feb 2026

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.

StepFun

Date	Launch post	Score	As the post writes it
2 Feb 2026	Step 3.5 Flash	56.3	xbench-DeepSearch (2025.10)

One system card reports it

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
11 Feb 2026	Step 3.5 Flash technical report	56.3	xbench-DeepSearch-2510, avg@3 (Table 5)	Capabilities

Versions

We switch the top row to each new version when it comes out. Open it for one row per version. An old version stays in play while people still test it, so whoever first takes it past 85% gets credit for closing it out.

xAI StepFun OpenAI

xbench-DeepSearch-2510 Not tested since Feb 2026