Morning over Ocean Mile beach, the port and downtown Port Solana behind

AI built this city

Made by Claude Opus 5.5

Port Solana is a playable 3D city with streets, beaches, traffic, and nightlife. Claude Opus 5.5 made it from the same assignment given to the other games in our game benchmark.

Buildings
3,445
Roads
151 km
Story missions
28
Lines of code
~162,000

From the development report. Status: playable demo with bugs.

Video

Life in Port Solana

A two-minute film shows the streets, coastline, traffic, and city nightlife.

Real in-game footage, recorded and edited by Claude Opus 5.5. 2:14 · 1080p60 · Watch on YouTube

How it was made

From assignment to video

The initial prompt, the agents' work, and the showcase video are three separate steps.

  1. The initial prompt

    The run started from one task prompt of the game benchmark, the same one the other games in the comparison received.

  2. Agent work

    From 26 to 28 September 2026, Claude Opus 5.5 agents worked on the game in eleven waves. The report lists 175 passing automated checks.

  3. The showcase video

    The video and the gallery screenshots were made after the game was finished. They are real footage from the running game, recorded and edited by Claude Opus 5.5, not AI-generated imagery. They were captured in a later build with a showcase mode and small visual fixes from 29 September; the playable demo is the 28 September build.

The benchmark evaluation still records many bugs; this is a model run you can inspect, not a finished commercial game. Read the development report in English

What it cost

Time, agents and tokens

Agent working time
~35 h
Excluding pauses for usage limits; all agents together ~134 h.
Agent runs
69
Including restarts after interruptions; up to 6 agents at once, later 4.
Tokens processed
~4.07 bn
Almost 97% of it was context served from the cache.
Tokens written by the model
~3.2 M
Code, text, commands, and reasoning.
Cost at API list prices
~$1,512
Agents ~$1,409, main conversation ~$103.

The figures cover building the game (26–28 September 2026); making the video and screenshots is not included. The amount is calculated from Claude Opus 5.5 API list prices, not an invoice; with a claude.ai subscription the actual cost may differ.

Downtown and the ferris wheel at night

Explore the city yourself

Play the game right in your browser