How did GPT–6 Astra break the Enigma code?

GPT–6 Astra used advanced algorithms to autonomously solve complex transcription errors within the MVUEH message, achieving what had been impossible since 2005.

Artificial Intelligence

GPT-6 Astra: The AI That Cracked Enigma

What if AI could crack codes untouched since WWII? GPT-6 Astra just did that.

SLWritten bySofia LindqvistAI Research Lead

September 23, 2026 2 min read 3 views

man in black crew neck t-shirt holding 3 x 3 rubiks cube — Photo by Siz Islam on Unsplash

GPT-6 Astra: The AI That Cracked Enigma

What happens when an AI tackles puzzles left unsolved since World War II? On September 15, 2026, GPT-6 Astra broke an Enigma message that had resisted decryption for decades. This achievement showcases AI's potential in cryptography and opens doors for new applications in machine learning.

Key Takeaways

GPT-6 Astra cracked a long-standing Enigma message.
Solved a mystery unsolved since 2005.
The break points to new cryptographic potential for AI.
Overcame complex transcription errors autonomously.

Breaking the Unbreakable: A Historic Feat

A Stubborn Cipher Falls

The German Army Enigma message MVUEH, dated July 10, 1941, was decrypted by GPT-6 Astra. Discovered in 2005, this message defied previous attempts due to its unique key and complex transcription errors Cryptocellar.

Autonomous Achievement

GPT-6 Astra did it alone. Carter Leffer instructed the AI to attempt decryption; the model handled everything else. Unlike past efforts relying on human intuition and manual tweaks, GPT-6 Astra used sheer computational power and advanced algorithms.