Skip to content

News · Claude

Claude: A foliage simulator compares early Sonnet 5 and 5.5 results

Posted on X by Claude (@claudeai) on 28 September 2026. The headline is our summary; the post itself is quoted below.

Claude@claudeai ·

A thread of early experiments with Claude Sonnet 5.5. A fall foliage simulator by @_re_pete , made with Sonnet 5 vs Sonnet 5.5. pic.twitter.com/bVbUmS7tSw

The quote is the post as published on X; the original may include images, links or a thread.

Context

  • Claude Code 2.1.284Released the same day (UTC). Added Claude Sonnet 5.5 (claude-sonnet-5-5), now the default Sonnet model on the Anthropic API — 1M context, $2/$10 per Mtok with $0.20/Mtok cache reads…
  • AI news in September 2026The month in one page: posts, releases, resets and blog posts.
  • All Claude newsSelected posts, newest first.