Dario Amodei, co-founder and CEO of artificial intelligence startup Anthropic.
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Anthropic on Monday announced its latest artificial intelligence model, Claude Opus 4.5. The company says this model is excellent at assisting users with coding, computer usage, and complex enterprise tasks.
Claude Opus 4.5 marks Anthropic’s third major model launch in two months and serves as the latest example of the non-stop pace of development within the AI industry. The company introduced the Claude Sonnet 4.5 model in late September and the Claude Haiku 4.5 model in October.
“We’re incredibly excited given the volume that we’re releasing into the market and the feedback loop that’s going to be created from that,” Scott White, Anthropic’s Claude.ai product lead, said in an interview with CNBC.
Anthropic is an AI startup founded in 2021 by a group of former OpenAI researchers and executives. microsoft and Nvidia announced a multibillion-dollar investment in Anthropic last week, increasing the AI Institute’s valuation to about $350 billion.
The company is best known for developing a family of AI models called Claude. Models are assigned new numbers with each generation, but typically the largest model in the family is called the Opus, the mid-sized model is called the Sonnet, and the smallest model is called the Haiku.
The last Opus model that Anthropic released in August was called the Claude Opus 4.1.
White said Claude Opus 4.5’s ideal users are professional software developers and knowledge workers such as financial analysts, consultants and accountants. White added that people who are “excited to push their own creativity, build something new, and expand their professional scope” will also find the model helpful.
Anthropic said in a blog post that the new model is “significantly better” at everyday tasks such as working with spreadsheets and slides and conducting detailed research.
Claude Opus 4.5 is also state-of-the-art when it comes to agent coding, outperforming competing models such as: Google According to SWE-bench Verified, a test set that measures the software coding capabilities of AI systems, Gemini 3 Pro and OpenAI’s GPT-5.1 were announced last week.
Anthropic said that when it tested Claude Opus 4.5 on a challenging take-home exam for future performance engineers, the model scored higher than previous human test takers.
Claude Opus 4.5 is available everywhere and will be the default model for Anthropic’s Pro, Max, and Enterprise products.
In addition to the model launch, Anthropic announced several other product and feature updates on Monday.
Claude for Chrome, the startup’s extension that allows Claude to perform actions across browser tabs, is being expanded to all Max users, the company said. Claude for Excel, which helps you understand and edit spreadsheets, is now generally available to all Max, Team, and Enterprise users.
Anthropic is also introducing Claude Code to its desktop app and adding new features to its developer platform.
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