Claim: Anthropic will release Claude Mythos that hacked Bitcoin and cracked a 15 bit private key.
Conclusion: The claim is false. No Anthropic documentation or announcements link Claude Mythos to cracking any Bitcoin-style private key, that uses 256-bit elliptic curve security. The 15 bit private key was cracked by an independent researcher, Giancarlo Lelli and not AI.
Rating: False
Several social media users have claimed that Bitcoin is in danger because of Claude Mythos can crack it. Verified X user ‘CryptoNobler’ shared such a post with a part of the caption : “ANTHROPIC TO RELEASE AI THAT “HACKED” BITCOIN TOMORROW! 6 WEEKS AGO, CLAUDE MYTHOS CRACKED A 15-BIT PRIVATE KEY THAT POTENTIALLY GIVES ACCESS TO 6.9 MILLION BTC, WORTH OVER $430,000,000,000.” Attached to the post is a video which looks like a terminal code execution. View the post below –
🚨 BREAKING
ANTHROPIC TO RELEASE AI THAT “HACKED” BITCOIN TOMORROW!
6 WEEKS AGO, CLAUDE MYTHOS CRACKED A 15-BIT PRIVATE KEY THAT POTENTIALLY GIVES ACCESS TO 6.9 MILLION BTC, WORTH OVER $430,000,000,000.
THIS IS NOT LOOKING GOOD FOR BITCOIN AND CRYPTO… https://t.co/ssocpcGFUC pic.twitter.com/d8PiTG6ZZQ
— 0xNobler (@CryptoNobler) June 9, 2026
Other users have also shared similar claims that can be seen here and here
FACT CHECK
DigitEYE India decided to investigate this claim and found it to be false. No official Anthropic announcement or research paper states that Claude Mythos was used to break a Bitcoin-style private key. The widely reported 15-bit elliptic curve key demonstration was carried out by quantum computing researcher Giancarlo Lelli on publicly accessible hardware, with no indication that Claude Mythos played a role in the achievement.
Details:
We first conducted a web search with the phrase “Anthropic releases Claude Mythos” to learn more about it. According to a report by Anthropic published on June 9, 2026, Mythos 5 is described as “having “the strongest cybersecurity capabilities of any model in the world.” Moreover, Mythos 5 performed genomics research that lasted “over a week of largely autonomous work” and drug-design tasks where it “matches or beats” skilled human operators. View a section of this report below –
Under the cybersecurity section, the report states that researchers found “no universal jailbreaks in over 1,000 hours of testing” and that their goal is to make jailbreak attempts “sufficiently slow and costly” so they can be detected and prevented before being used at scale. Safeguards are discussed and we found no announcements or reports from Anthropic stating that Mythos 5 has been used for such purposes. View this particular section below –
Following this, we searched whether Claude Mythos cracked a 15 bit private key but did not find any evidence. A CoinDesk report notes that independent researcher Giancarlo Lelli successfully broke a 15-bit elliptic curve key using publicly accessible quantum hardware, winning Project Eleven’s 1 BTC “Q-Day Prize”. However, the report emphasizes that “Bitcoin uses 256-bit elliptic curve security” and Lelli’s achievement does not mean Bitcoin can be cracked. View a section from the report below –
DigitEYE India found no evidence or credible reports about Claude Mythos cracking a key which gives access to 6.9 million BTC, as claimed in the post.
Thus, the claim is false.
