If you're not familiar with Claude, it's the family of large-language models made by the AI company Anthropic. And Claude ...

Claude Sonnet 4 is the smaller model, but it's still a major upgrade in power from the earlier Sonnet 3.7. Anthropic claims Sonnet 4 is much better at following instructions and coding.

Sonnet 4 is similar, but tuned for reasoning and balanced for efficiency – meaning it's less expensive to run. Claude's latest duo arrives amid a flurry of model updates from rivals.

According to Anthropic, Claude Sonnet 4 is a significant upgrade to Claude Sonnet 3.7, offering improved coding and reasoning along with the ability to respond to instructions more precisely.

Meanwhile, Sonnet 4 — designed as a "drop-in replacement" for Sonnet 3.7 — improves in coding and math compared to Anthropic's previous models and more precisely follows instructions ...

Sonnet 4 is a faster, more efficient model for everyday tasks. Both models boast an impressive memory, understanding hundreds of pages of text, which helps them follow long, complicated instructions.