Sep 08, 2026 10:56:00

The GPT-6 Astra completed the puzzle FPS game 'Portal' without human assistance, costing approximately 90,000 yen.

OpenAI's

GPT-6 Astra has reportedly completed the puzzle FPS game ' Portal ' without any human intervention. The API cost for the GPT-6 Astra to complete the game was $571.18 (approximately 89,000 yen).

cozyblaze/portal-agent: The setup I used for my GPT-6 Astra Portal run: controller, SourcePauseTool patch, setup guide, and sanitized session log.
https://github.com/cozyblaze/portal-agent

AI model successfully completes Portal, but it costs $571 in tokens - VideoCardz.com
https://videocardz.com/newz/ai-model-successfully-completes-portal-but-it-costs-571-in-tokens

The actual gameplay footage is available on YouTube and can be viewed at the link below. However, it does not include the entire game from start to finish; the time when the GPT-6 Astra pauses to perform inference is cut out. Therefore, although the video is approximately 2 hours long, according to cozyblaze , who conducted the test, it took him 23 hours and 43 minutes to complete the game.

GPT-6 Astra Plays Portal - YouTube


Portal is an FPS game where you use a gun that can place warp portals to navigate complex stages and escape from a facility.

GPT-6 Astra runs on an MCP server and plays Portal using an improved version of the '

SourcePauseTool ' plugin, which pauses the game during loading and level transitions. The game is paused while GPT-6 Astra is thinking, and resumes when the model sends an input sequence.

Portal is a puzzle game, but you can get a game over if you stumble or get stuck in a trap. Each time, GPT-6 Astra restarts and continues to make deductions.

They can also use tools to clear a path.

Furthermore, there are moments that require precise timing, but GPT-6 Astra encourages players to keep trying and retrying until they succeed.

We've arrived at the stage for the final boss, GLaDOS.

To beat GLaDOS, you need to notice several tricks while playing, but GPT-6 Astra managed to do so through trial and error. According to cozyblaze, GPT-6 Astra ultimately made 3336 tool calls, incurring an API cost of $571.18.

The ending song, 'Still Alive,' is a sarcastic tune about GLaDOS, an AI created for experimentation, still being alive even after being destroyed by humans. However, it was GPT-6 Astra, also an AI, that destroyed GLaDOS.

Cozyblaze has made the setup used for this verification publicly available on GitHub. Furthermore, Cozyblaze live-streamed the entire process of GPT-6 Astra completing 'Portal' on YouTube, and the archive can be viewed below. You can see where GPT-6 Astra struggled, what kind of thought process was involved, and how many tokens were used.

GPT-6 Astra Portal Full VOD Part 1 - YouTube


GPT-6 Astra Portal Full VOD Part 2 - YouTube


GPT-6 Astra Portal Full VOD Part 3 - YouTube