Anthropic has released its latest frontier AI model, Claude Sonnet 4.5, built for high-performance coding and building complex agents. Anthropic claims it is “the best coding model in the world” and “the best model at using computers,” with substantial gains in reasoning and math. Claude Sonnet 4.5 is distinctive in that it can build “production-ready” applications and is not limited to prototypes, Anthropic says, describing it as a major gain over previous models. The new model also excels in research as well as enterprise basics like cybersecurity and finance, per Anthropic. Continue reading Anthropic Claude Sonnet 4.5 Good at Coding and Collegiality

Claude Opus 4 and 4.1 now have the discrete ability to end “abusive” or “harmful” conversations in consumer chat interfaces. Anthropic says the feature was developed as part of its exploratory work on the protection and well-being of its AI models. The company also envisions broader safety uses, although it does point out that having a model defensively terminate a chat is an extreme measure, intended for use in rare cases. “We’re working to identify and implement low-cost interventions to mitigate risks to model welfare,” Anthropic explains, qualifying it is unsure “such welfare is possible.” Continue reading New Anthropic Safety Updates Focus on Claude’s Well-Being

Anthropic has released Claude Opus 4.1, an upgrade to Opus 4 that reportedly improves on agentic tasks, computer coding and reasoning. Pricing has not increased from what customers were paying for Opus 4, and the company promises “substantially larger improvements to our models in the coming weeks.” The move comes as Anthropic nears a new funding round targeting $3 to $5 billion, which could place a valuation of up to $170 billion on the startup. Recurring revenue hit $5 billion as of late July, which could increase to $9 billion by the end of the year. Claude Opus 4.1 was released two days before OpenAI unleashed GPT-5, and performs comparably in coding benchmarks. Continue reading Anthropic Seeks to Raise $5 Billion, Debuts Claude Opus 4.1