Anthropic launches Claude Sonnet 5.5 with near-Opus performance at half the price

September 28, 2026 · 6:00 pm 2 sources

Image: The New Stack

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• Anthropic launches Claude Sonnet 5.5 with near-Opus performance at half the price
  The New Stack · September 28, 2026 18:00
  Anthropic on Monday launched Claude Sonnet 5.5, the latest version of its workhorse model and the second model in the The post Anthropic launches Claude Sonnet 5.5 with near-Opus performance at half the price appeared first on The New Stack .
• Anthropic upgrades Claude with new Sonnet 5.5 model, details here
  9to5Mac · September 28, 2026 18:07
  Anthropic is upgrading Claude Sonnet, replacing Sonnet 5 from June with Sonnet 5.5 as the best medium-sized model. more…