Kraken Parent Payward Brings Anthropic's Mythos 5 Into Crypto Security

On April 7, 2026, Anthropic limited access to its Claude Mythos 5-class model, released as Mythos Preview, to selected Project Glasswing launch partners for defensive cybersecurity and committed up to $100 million in usage credits (Anthropic). As of August 19, 2026, Payward Inc., Kraken’s parent, is not listed among those partners, and it has issued no matching announcement. Reporting says major crypto exchanges including Coinbase and Binance sought access but were kept out in the initial phase (Clubic).

Project Glasswing’s remit and Mythos 5-class capabilities

Anthropic describes Project Glasswing as a defensive-security program where selected organizations test, find and remediate software vulnerabilities using Claude Mythos Preview. In company materials, Anthropic says Mythos Preview autonomously identified thousands of zero-day vulnerabilities, citing a 27-year OpenBSD flaw and a 16-year FFmpeg bug among examples. The firm also published internal benchmark results on the CyberGym vulnerability-reproduction task, where it reports Mythos Preview at 83.1% versus Opus 4.6 at 66.6% (Anthropic).

Because crypto platforms run internet-facing systems that draw persistent probing, a model positioned for vulnerability discovery and triage would sit close to their operational risk controls.

Who has access so far

Public confirmations to date come largely from security and financial-infrastructure providers. Financial-technology firm Broadridge said on June 17 that it joined Project Glasswing and would use Claude Mythos Preview in its defensive-security work (Broadridge via PR Newswire). HackerOne followed on July 10 with its own announcement that it joined Glasswing and gained access to Mythos Preview (HackerOne).

• Confirmed Glasswing participants: Broadridge and HackerOne in company press releases, plus the launch-partner roster presented in Anthropic’s April 7 materials (Anthropic).

Anthropic’s program materials emphasize a curated approach oriented to selected and, in many cases, regulated institutions (Anthropic).

Status check on Payward/Kraken

That absence aligns with Anthropic’s official Glasswing partner materials, which do not include Payward or Kraken (Anthropic), and with Kraken’s public-facing news pages, which contain no matching disclosure.

If access expands to a crypto exchange, what would be at stake

Based on Anthropic’s stated posture for Glasswing, inclusion of a major crypto exchange would signal an expansion beyond the documented initial cohort of selected and often regulated partners. For an exchange, access to Mythos Preview’s vulnerability-finding and reproduction capabilities, together with substantial usage credits described by Anthropic, could accelerate patch cycles and hardening across wallets, APIs and trading systems.

For now, the clearest indicators of Mythos access remain Anthropic’s public partner list and named company press releases such as those from Broadridge and HackerOne. Payward/Kraken does not appear there as of August 19.

Disclaimer: This article is provided for informational purposes only. It is not offered or intended to be used as legal, tax, investment, financial, or other advice.