On August 20th, 2026, a high capability artificial intelligence model designated as Ox Alpha (frequently referenced in technical developer channels as 0x Alpha) appeared anonymously on the AI model marketplace OpenRouter under the model identifier stealth/ox-alpha and on the software development tool gateway OpenCode via its Zen endpoint as x-preview-f-free. Cataloged under the vendor label "Stealth," the model was introduced as a free preview offering a combination of a one