ChatGPT and Claude 4 are two of the smartest AI assistants available but they’re built with different strengths. Here’s how they compare to help you choose.

Opus 4 is tuned for coding and long-running agent-based workflows. Sonnet 4 is similar, but tuned for reasoning and balanced for efficiency – meaning it's less expensive to run.

Claude Opus 4 excels at coding and complex problem-solving, whereas Claude Sonnet 4 improves on Sonnet 3.7 and balances performance and efficiency.

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.

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.

Free users of Claude can only access the new Sonnet 4 model. However, Pro, Max, Team, and Enterprise Claude plan users can access both models and extended thinking.

Anthropic announced Claude Opus 4 and Claude Sonnet 4 on Thursday, touting the advanced ability of the models to "analyze thousands of data sources, execute long-running tasks, write human-quality ...