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Mark Sullivan

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San Francisco
As seen in: Fast Company, LinkedIn, Medium, MSN, Yahoo Entertainment, Business Insider, Color Research & Application, El País, HuffPost, Icon en El País, La Nación (Argentina) and
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Mark Sullivan’s Biography

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Mark Sullivan is a senior writer at Fast Company, covering the hardware and software products of large platform companies like Apple, Google, Microsoft, and Samsung. Before coming to Fast Company in January 2016, Sullivan wrote for VentureBeat, Light Reading, CNET, Wired, and PCWorld. He's been seen talking about tech on CNN, Fox Business, and Al Jazeera US. Sullivan is a graduate of the Medill School of Journalism at Northwestern University. You can reach him at sullivan@fastcompany.com. His T…

Articles

Anthropic releases Claude Opus 5 for both AI coding and general office work

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By Mark Sullivan Verified
| Fast Company Verified
Today Anthropic released its new Opus 5 model, which the company claims delivers performance comparable to its more advanced Fable 5 model at half the price. Opus 5 is designed for both complex coding and general office work. Anthropic says the model can make its way through the steps of a complicated problem without much back-and-forth with the user. Plus, it can check its own work and recover from errors rather than getting stuck.
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Anthropic releases Claude Opus 5 for both AI coding and general office work

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By Mark Sullivan Verified
| Flipboard
Technology 5 hours ago I replaced Claude with ChatGPT and the results actually shocked me xda-developers.com - Parth Shah • 5h Claude has been my go-to AI assistant for months, especially when I needed thoughtful writing, detailed analysis, or help with complex coding tasks.
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If open weight models are the future, U.S. AI companies are going to have a hard time

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By Mark Sullivan Verified
| Fast Company Verified
Top executives at leading Western AI companies are increasingly warning about the safety and national security risks posed by Chinese open-weight frontier models. What they tend not to mention is that these models are improving rapidly and, because they are freely available, pose a serious threat to Western labs’ business models. The most powerful models from U.S. labs such as OpenAI, Anthropic, and Google DeepMind are closed, meaning the parameters that shape their outputs are kept secret.
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