Crypto slips as Iran tensions rise, Anthropic limits Mythos

Cryptocurrencies fell 2–4% on Tuesday and into Wednesday morning after two separate headlines and ahead of the U.S. consumer price index reading. Investors reacted to a U.S. Army Apache crash near the Strait of Hormuz and to Anthropic’s public release of Claude Fable 5, the public version of its Mythos model, which includes limits on cybersecurity and smart-contract reviews.

The Apache went down near the strategic waterway on Tuesday; both crew members were rescued. U.S. forces carried out retaliatory strikes. Former president Donald Trump urged a response, saying “the United States must respond.” The incident occurred amid active diplomacy in the region.

Anthropic released Claude Fable 5 publicly after previously keeping Mythos behind a restricted security track. The company reports the model scores 78% on a vulnerability-discovery benchmark and is optimized to find software bugs. For the public release, Anthropic restricts prompts involving cybersecurity, biology or chemistry, routing them to an older model called Opus 4.8. Anthropic noted the Opus fallback activates in fewer than 5% of sessions and that the uncapped Mythos 5 remains available only to vetted corporate customers.

Security researchers and developers reported that the public version will not perform smart-contract reviews and often redirects such requests to Opus 4.8. Market participants had expected broader vulnerability-finding capabilities that could support automated code audits.

Bitcoin traded near $61,600, down about 1–2% from prior levels, while ether and other major tokens fell between 2% and 4% as markets processed the headlines and awaited the CPI print. Bitcoin exchange-traded products recorded roughly $77 million in net outflows and ether ETFs posted about $41 million in net outflows on Tuesday.

Other industry developments included a $175 million funding round for a decentralized finance lending protocol led by a16z and Paradigm to expand institutional credit onchain. Talks in Washington over crypto tax policy showed slower progress than some lawmakers had expected.

Anthropic described the guardrails on the public model as intended to prevent misuse and to keep the most capable configurations under stricter access controls. The company maintained that vetted partners retain access to less restricted versions for enterprise work.

Short-term selling occurred as market participants digested the regional incident, the guarded AI rollout and incoming inflation data.