Claude Sonnet 4, meanwhile, is described as a more practical, efficient upgrade from its predecessor, Claude Sonnet 3.7, and is now available to free-tier users.

Claude Sonnet 4 has impressed companies like GitHub, Manus, iGent, Sourcegraph, and Augment Code with its impressive capabilities. It excels in following complex instructions, autonomous app ...

The Claude 4 family is also less likely than Sonnet 3.7 to engage in "reward hacking," claims Anthropic. Reward hacking, also known as specification gaming, is a behavior where models take ...

Claude Sonnet 4: $3.15 per million tokens, providing a cost-effective option for less intensive use cases. Additionally, subscription plans, such as a $200/month option, cater to both individual ...

In parallel, Sonnet 4 rounds out the offering with faster response times and enhanced alignment, showing significant gains over its predecessor Sonnet 3.7, including a matching 72.7% on SWE-bench.

But more on that right away. Anthropic announced Claude Opus 4 and Claude Sonnet 4. The company claims that Claude Opus 4 is the world’s best coding model, excelling in agent-based workflows and ...

The Sonnet 3.7 model progressed further in the game than Sonnet 3.5, and now Anthropic says the Claude 4 Models are playing the best yet, thanks to a new ability to store "memory files" of key ...

Anthropic announced the Claude Opus 4 and Claude Sonnet 4 as the first lineup of the Claude 4 series on May 22, 2025. Claude Opus 4 is advertised as having world-class coding capabilities, while ...

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, according to the ...