AINewsnow

Anthropic launches Claude Opus 5.5, promising Fable-level performance at a lower price

This story is from 2026-09-22. It is preserved in the archive; the latest stories are on the live feed.

Anthropic says Claude Opus 5.5 rivals Fable 5.1 on most work at 40 percent lower cost than Opus 5, with tougher safeguards.

Read the full story at Mashable AI ↗

Timeline · 2 reports

  1. 2026-09-22 20:41 · TestingCatalog AI News
    Anthropic launches Claude Opus 5.5 with lower API costs
  2. 2026-09-22 17:12 · Mashable AI
    Anthropic launches Claude Opus 5.5, promising Fable-level performance at a lower price

More stories

  1. Perplexity launches Teammates, always-on AI agents for ongoing work — The Verge AI
  2. Anthropic simplifies repo setup for Claude Code cloud sessions — Anthropic (X)
  3. Anthropic launches Personal Finance beta in Claude for US users — Anthropic (X)
  4. Anthropic tests Claude as an agent in two EVE online games — Anthropic News
  5. Anthropic details how researchers use Claude for scientific discovery — Anthropic News
  6. AI systems generate human-like text but do not 'think' like humans, researchers say — The Conversation AI (US)
  7. Bringing Claude models in Microsoft Copilot into the EU Data Boundary — Microsoft Research Blog
  8. Kimi K3.1 Pro Weights Are Out: $20M License Cliff, ~1.56 TB Reality, and Hosted vs Self-Host — DEV Community — Machine Learning

Get the daily brief of stories like this at 6:30 every morning →