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Claude AI

Claude Mythos 5: What It Is, Access, and How It Compares

Claude Mythos 5 is Anthropic’s restricted-access Mythos-class model — the same underlying model family as Fable 5 but with fewer safeguards and stricter access controls. It is limited to approved Project Glasswing and trusted-access partners. This guide covers what Mythos 5 is, how access works, benchmark data, safety design, and when Mythos-class capability matters versus Fable 5 or Opus 5.

Claude AI

Claude Opus 5: Benchmarks, Pricing, and Full Guide (July 2026)

Claude Opus 5 launched July 24, 2026. It delivers near-Fable 5 intelligence at Opus pricing ($5/$25 per MTok), with a 1M-token context window, 128K max output, and state-of-the-art results on Frontier-Bench, ARC-AGI 3, and OSWorld 2.0. This guide covers benchmarks, pricing, safety, access, and how Opus 5 compares to Fable 5, Sonnet 5, and the competition.