Temporal reasoning with search

Gemini 4 Argon 11.8% Only in system cards

Models with search answer real queries that test date arithmetic, stale facts and time-sensitive context. Reports error rate.

In-house Google DeepMind evaluation. The tasks are not public.

Made by Google DeepMind Questions that need search Tasks kept private Last in a system card Oct 2026 Last model added Oct 2026

Level: Everyday Most adults, without training
Scored: Graded by a model A language model scores each response, usually against a rubric.
Answers: Short answer A number, word or short string matched to a key.

Model scored in lab cards

System card reports it, from 1 lab

Gemini 4 Argon leads with 11.8%

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

1 Gemini 4 Argon 11.8%

#	Model	Score	Setting	Date	Source
1	Gemini 4 Argon	11.8%		Oct 2026	Model card

Scores over time

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

Reported by the lab in its model card

Labs report it only in system cards

We read the headline results of 479 launch posts from 51 labs, and none of them list this benchmark. Some system cards do, below.

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
13 Oct 2026	Gemini 4 Argon system card	11.8	Temporal reasoning (internal), error rate 11.8%, with search (Table 5.4)	Hallucination

Gemini 4 Argon leads with 11.8%

Scores over time

Labs report it only in system cards

One system card reports it

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