Topic · 54 stories · page 3 of 3
54 stories tagged anthropic on AI Tamer, newest first.
Anthropic’s Claude Sonnet 5.5 (model ID claude-sonnet-5-5): $2/$10 input/output, $0.20 cache reads, $2.50 cache writes. Anthropic claims 30%+ faster than Sonnet 5, up to 30% less per task, Terminal-Bench 70.6% / CursorBench 55.5%. Haiku 5.5 coming weeks.
Anthropic released Claude Sonnet 5.5 on 2026-09-28 at $2/$10 per million input/output tokens, unchanged from Sonnet 5. Its published benchmark table puts it near Opus 5.5 on several tasks, while its migration guide lists breaking changes for Sonnet 5 users.
Anthropic's new Opus lists at $4/$20 per million tokens with $0.20 cache reads, and early users call it the best Opus in a year. It also breaks Opus 5 code in four places and trips its security classifier on ordinary work.
Anthropic says Claude agents spotted array-associated reverse transcriptases (ART) in jumbo phages — an RT beside DNA repeats reminiscent of CRISPR arrays. Function is unknown; Anthropic preprint, not peer-reviewed. Discovery, not a gene-editing tool.
Claude Code 2.1.277 adds AGENTS.md when no CLAUDE.md is present (not yet on Bedrock, Vertex, or Foundry). Built as a Mods function-hook. Anthropic staff say a telemetry/feature-flag silent skip was fixed in v2.1.281.
Anthropic’s Claude Opus 5.5 (2026-09-22) is the new default Opus in Claude Code and shipped same-day across GitHub Copilot surfaces. The cost story is cache-heavy agent work — not the list-price cut alone.
