Developers on X report that Opus 5 requests in Claude Code are being served by a new 'Opus 5.2' model slug, suggesting Anthropic skipped 5.1 entirely. Early community testers put it near GPT-6 Astra tier for coding. But Anthropic has confirmed nothing, its docs still list claude-opus-5 as current, and no opus-5-2 appears in OpenRouter's catalog. No official pricing exists. New corroboration: the 'claude-opus-5-2' model slug has surfaced in Microsoft Foundry with reasoning_effort tiers (low/medium/high/xhigh/max), and third-party API listings report it reachable across Claude Code, Chat, and Cowork. Anthropic itself has still confirmed nothing — its docs still list claude-opus-5 as current — so this stays a rumor.