Anthropic's Claude 4 models show particular strength in coding and reasoning tasks, but lag behind in multimodality and context window size compared to Google and OpenAI offerings.

Claude 4 Sonnet is a leaner model, with improvements built on Anthropic's Claude 3.7 Sonnet model. The 3.7 model often had problems with overeagerness and sometimes did more than the person asked it to do, Amodei said. While it's a less resource-intensive model, it still performs well, he said.

Faced with the news it was set to be replaced, the AI tool threatened to blackmail the engineer in charge by revealing an extramarital affair.