Anthropic releases Claude Sonnet 5.5, a faster and cheaper follow-up to Opus 5.5
Anthropic's Sonnet 5.5 model is reportedly an upgrade over Sonnet 5 and costs up to 30 percent less per task.
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Timeline · 2 reports
- 2026-09-29 04:20 · MarkTechPost
Anthropic Releases Claude Sonnet 5.5: 70.6% on Terminal-Bench 4.0 at the Same $2/$10 Price - 2026-09-28 19:16 · Mashable AI
Anthropic releases Claude Sonnet 5.5, a faster and cheaper follow-up to Opus 5.5