A.I.

Anthropic

Claude frontier lineup

  1. Claude Fable 5.1 Most capable widely released. 1M ctx · 128K out · $10/$50 · adaptive always onMythos 5.1 = same, Glasswing only.Opens the Fable chassis →
  2. Claude Opus 5 Default start. 1M · 128K · $5/$25 · adaptive
  3. Claude Sonnet 5 Speed + intelligence. 1M · 128K · $2/$10 · adaptive
  4. Claude Haiku 4.5 Fastest. 200K · 64K · $1/$5 · extended thinking