2 entries with this tag
One new research article published: Claude Sonnet 5.5 deep-dive covering the 60-point Terminal-Bench jump, 30% speed gain, first Sonnet with cyber safeguards and distillation protection, and the collapsing Sonnet-to-Opus gap.
On September 28, 2026, Anthropic released Claude Sonnet 5.5 — the second model in the 5.5 family. At the same price as Sonnet 5 ($2/$10 per million tokens), it scores 70.6% on Terminal-Bench 4.0 (vs. Sonnet 5's 10.3%), runs 30%+ faster, costs up to 30% less per task, and is the first Sonnet model to launch with cyber safeguards and distillation protection.