Semantris: what its AI actually does

Google's word-association arcade game — the oldest live entry in the index and still the only one built as an action game rather than a daily puzzle.

Quick answer: Semantris scores your guesses by meaning rather than spelling. The model is doing real work every turn, but it never speaks — 6/10. It is free to play, no account needed, on the web. Verified live August 13, 2026.

Disclosure: WordGameAI is operated by MidnightDev, who make Yapword. This page scores Semantris by exactly the same published rubric we apply to our own game.

Score breakdown

The AI Involvement Score measures how much the AI does while you play — not how good the game is. Full rubric here.

✓Runs at play time
A model executes while you are playing.3/3

×Generates language back to you
It returns numbers, ranks or tiles — never language of its own.0/2

✓Evaluates your input semantically
Your guess is judged by meaning, not spelling.2/2

×Responsive hints
No model-derived hints we could verify.0/1

×Adapts to you
Every player gets the same behaviour; the AI holds no state about you.0/1

✓Model disclosed by the operator
The operator names it: Universal Sentence Encoder.1/1

AI Involvement Score6/10

Without the model-disclosure point: 5/9.

The record

Developer	Google Research
Launched	2018
Model disclosed	Universal Sentence Encoder
Daily puzzle	no
Unlimited play	yes
Difficulty levels	not verified
Multiplayer / challenges	not verified
Themed or custom games	not verified
Account required	no
Price	free
Playable archive	no
Platforms	Web
AI type	Semantic scoring
Last verified	2026-08-13

We could not verify: Difficulty levels, Multiplayer / challenges, Themed or custom games. These are recorded as unknown rather than guessed, and unknown counts against the score.

Download the raw record (games.json) →

Play it

https://research.google.com/semantris/ — confirmed reachable on 2026-08-13. We do not take payment for placement and we do not use affiliate links.

Others like it

Games in the index that use AI the same way, with their scores:

Semantle7/10The canonical semantic word game and still the benchmark: every guess is scored by cosine distance in a disclosed word2vec space, with hints and a… Semantle (legacy build)7/10David Turner's original build is still served, including the team/room co-op mode the current semantle.com dropped. סמנטעל (Semantle Hebrew)7/10Hebrew adaptation on puzzle #1635, with optional sign-in that unlocks hints and stats and a tip jar rather than a paywall. Linxicon7/10Bridge two random words by adding words that clear a 40% cosine-similarity threshold — the most explicit published scoring rule of any game in the…

The one where the AI talks back

Yapword is one of 9 live word games where the AI produces language during play, and one of 3 that respond to how you personally played. Free daily, no account.

Play Yapword

Frequently Asked Questions

Does Semantris really use AI?

Semantris scores 6 out of 10 on the WordGameAI rubric. A model runs while you play, so yes — the AI is doing work every turn. Google's word-association arcade game — the oldest live entry in the index and still the only one built as an action game rather than a daily puzzle.

What AI model does Semantris use?

Yes. The operator states it publicly: Universal Sentence Encoder. That earns the disclosure point in our rubric — most games in this category will not say.

What could you not verify about Semantris?

We could not verify difficulty levels, multiplayer / challenges, themed or custom games. Those fields are recorded as unknown rather than guessed, and unknown counts against the score. If you operate Semantris and can fill them in, we will update the record and re-date it.

Keep exploring

See the full AI Word Game Index (77 records), browse every profiled game, or read the ranked pick of the best AI word games.