OpenAI's GPT-5 Sees a Big Surge in Enterprise Use

ChatGPT now has nearly 700 million weekly users, OpenAI says. But after launching GPT-5 last week, critics bashed its less-intuitive feel, reports CNBC, 'ultimately leading the company to restore its legacy GPT-4 to paying chatbot customers.'

Yet GPT-5 was always about cracking the enterprise market 'where rival Anthropic has enjoyed a head start,' they write. And one week in, 'startups like Cursor, Vercel, and Factory say they've already made GPT-5 the default model in certain key products and tools, touting its faster setup, better results on complex tasks, and a lower price.'
Some companies said GPT-5 now matches or beats Claude on code and interface design, a space Anthropic once dominated. Box, another enterprise customer, has been testing GPT-5 on long, logic-heavy documents. CEO Aaron Levie told CNBC the model is a 'breakthrough,' saying it performs with a level of reasoning that prior systems couldn't match...

Still, the economics are brutal. The models are expensive to run, and both OpenAI and Anthropic are spending big to lock in customers, with OpenAI on track to burn $8 billion this year. That's part of why both Anthropic and OpenAI are courting new capital... GPT-5 is significantly cheaper than Anthropic's top-end Claude Opus 4.1 — by a factor of seven and a half, in some cases — but OpenAI is spending huge amounts on infrastructure to sustain that edge. For OpenAI, it's a push to win customers now, get them locked in and build a real business on the back of that loyalty...

GPT-5 API usage has surged since launch, with the model now processing more than twice as much coding and agent-building work, and reasoning use cases jumping more than eightfold, said a person familiar with the matter who requested anonymity in order to discuss company data. Enterprise demand is rising sharply, particularly for planning and multi-step reasoning tasks.

GPT-5âs traction over the past week shows how quickly loyalties can shift when performance and price tip in OpenAI's favor. AI-powered coding platform Qodo recently tested GPT-5 against top-tier models including Gemini 2.5, Claude Sonnet 4, and Grok 4, and said in a blog post that it led in catching coding mistakes. The model was often the only one to catch critical issues, such as security bugs or broken code, suggesting clean, focused fixes and skipping over code that didn't need changing, the company said. Weaknesses included occasional false positives and some redundancy.
JetBrains has also adopted GPT-5 as the default for its AI Assistant and for its new no-code tool Kineto, according to the article.

But Anthropic is still enjoying a great year too, with its annualized revenue growing 17x year-over-year (according to 'a person familiar with the matter who requested anonymity')

Read more of this story at Slashdot.