§ models · storyline

Anthropic launches Claude Sonnet 5, nearing Opus performance at lower

Anthropic launches Claude Sonnet 5, positioning it as its most capable agentic Sonnet model with performance approaching Opus 4.8 at a lower price point.

Jun 30 · 20:10:57 · primary fetch2 sourcesupdated Jun 30 · 20:46:10

Anthropic: Anthropic launches Claude Sonnet 5, saying it nears Opus 4.8 performance at lower prices and is substantially better than Sonnet 4.6 for agentic work — Claude Sonnet 5 is built to be the most agentic Sonnet model yet.

It can make plans, use tools like browsers and terminals …

read full article on anthropic.com ↗

§ sources2 publications · timeline below

anthropic.comAnthropic launches Claude Sonnet 5, saying it nears Opus 4.8 performance at lower prices and is substantially better than Sonnet 4.6 for agentic work (Anthropic)primary20:10:57
the-decoder.comAnthropic's new Claude Sonnet 5 closes the gap to the pricier Opus model series20:46:10

§ how this story moved

20:10:57primary — Anthropic publishes the launch post.
20:46:10The Decoder picks up coverage.