OPEN LINK ↗
// 5h agoNEWS
Anthropic leaks Opus 4.8, Mythos 1 on Vertex AI
Developers discovered hidden identifiers for Claude Opus 4.8, Sonnet 4.8, and a new high-tier "Mythos 1" model within Google Vertex AI. The leaks suggest Anthropic is skipping version 4.7 to align its next-gen lineup for a major June release.
// ANALYSIS
The appearance of "Mythos 1" confirms Anthropic is moving beyond the Opus/Sonnet/Haiku trilogy toward specialized, high-stakes reasoning tiers.
- –Mythos 1 (codename Capybara) is reportedly an elite tier optimized for cybersecurity and advanced coding, potentially 5x the cost of Opus.
- –Skipping version 4.7 for Sonnet suggests a unified architectural jump to 4.8 across the entire model family.
- –Sightings in Vertex AI backends have historically preceded official Anthropic launches by just days or weeks.
- –The leak follows a "Mythos Preview" sighting in Claude Code source files, indicating deep integration with Anthropic's developer CLI.
- –Rumored 98%+ vision accuracy for UI design positions 4.8 as a direct offensive against GPT-5's multimodal capabilities.
// TAGS
anthropicclaudellmmodel-releasecybersecurityreasoningai-coding
DISCOVERED
5h ago
2026-05-26
PUBLISHED
17h ago
2026-05-25
RELEVANCE
10/ 10
AUTHOR
vslyhcrypto