Anthropic closes gap with OpenAI as enterprise adoption surges and business use triples

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Anthropic is rapidly gaining market share against OpenAI, with nearly one in three US businesses now paying for its Claude AI models. The company hit a $30 billion annualized revenue run rate while OpenAI's growth plateaus. Both AI leaders are racing to attract enterprise clients through new ventures with private equity firms and aggressive pricing strategies.

Anthropic Closes Gap as Enterprise Adoption Accelerates

Anthropic is gaining market share against OpenAI at an unprecedented pace, with new data revealing a dramatic shift in the competitive landscape for enterprise AI tools. Nearly one in three US businesses paid for Anthropic's Claude AI models in March, marking a rise of more than 6 percentage points from the previous month, according to payments data from Ramp based on $100 billion in annual card and invoice spending from 50,000 customers

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. Meanwhile, OpenAI's business adoption remained flat at 35 per cent, suggesting the ChatGPT maker's early explosive growth is proving difficult to sustain

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Source: SiliconANGLE

Source: SiliconANGLE

The momentum reflects accelerating enterprise demand for Anthropic's services, driven by strong interest in its Claude Code products and array of plug-ins designed to automate white-collar work. Global downloads of Anthropic's Claude chatbot tripled to 21 million in the month to March, while ChatGPT downloads rose just 5 per cent over the same period

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. More significantly, ChatGPT's weekly active users fell month-on-month in the US for the first time since the start of 2024, according to figures from Apptopia

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Revenue Run Rate Hits $30 Billion as Enterprise Clients Scale

Anthropic announced it had reached $30 billion in annualized revenue, up from $9 billion at the end of 2025

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. That growth is being driven largely by enterprise customers integrating the company's AI models into internal workflows and customer-facing applications via APIs, with a smaller share coming from subscriptions to premium chatbot features

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. More than 1,000 businesses are now spending over $1 million per year on Anthropic services on an annualized basis, up from roughly 500 two months earlier

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. Enterprise customers now represent approximately 80 per cent of Anthropic's revenue

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Source: Analytics Insight

Source: Analytics Insight

Anthropic's products are now more widely adopted across US information, financial and professional services than OpenAI's, but are also growing quickly in sectors such as construction and hospitality, according to Ramp's data

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. Charlie Dai, VP and principal analyst at Forrester, said the data points to a "clear shift in momentum" towards Anthropic, noting that factors like model performance, ease of integration, and enterprise fit matter more than short-term political or regulatory concerns

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AI Venture with Private Equity to Push Claude into Enterprise

Both Anthropic and OpenAI are pursuing aggressive strategies to embed artificial intelligence tools across corporate America through joint ventures with private equity firms. Anthropic is in talks to invest roughly $200 million in a new private-equity-backed joint venture designed to accelerate the push Claude into enterprise environments

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. The proposed structure would see buyout firms including Blackstone, Hellman & Friedman, and Permira take equity stakes totalling approximately $1 billion in the venture, which would operate as a consulting and implementation arm helping businesses integrate Claude into their operations

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The strategic logic is elegant: private equity firms control thousands of portfolio companies, giving Anthropic access to entire portfolios in one negotiation rather than approaching each enterprise independently

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. The proposed joint venture is modelled on Palantir's forward-deployment playbook, with engineers embedded inside customer organizations driving not just adoption but workflow transformation

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. Blackstone already holds approximately $1 billion in Anthropic equity, having invested $200 million at a $350 billion valuation in February 2026 as part of Anthropic's Series G round

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OpenAI is pursuing a similar partnership model with private equity firms including TPG, Advent International, Bain Capital, and Brookfield Asset Management, with total fundraising reportedly targeting approximately $4 billion

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. OpenAI is offering private equity firms a guaranteed minimum return of 17.5 per cent, while Anthropic is offering ordinary equity in the venture with no floor on returns

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Enterprise-Grade Controls and Pricing Moves to Attract Enterprise Clients

Anthropic introduced new organization-wide controls to help corporate teams deploy its autonomous Claude Cowork service, including role-based access controls for Enterprise subscribers that enable admins to choose exactly which capabilities employees can access

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. The company is also enhancing observability by expanding Cowork's OpenTelemetry support, allowing companies to monitor Claude events such as tool calls and file modifications directly within their security information and event management pipelines

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OpenAI is taking a different approach, slashing the cost of its Pro subscription to access Codex programming tools to $100 per month, effectively cutting its most premium subscription in half

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. The new tier offers five times as much usage as the existing $20 pricing tier and dramatically undercuts rival coding services, with top-tier subscriptions of Claude Code and Google's Gemini Code Assist both starting at $200 per month

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. OpenAI said its APIs now process more than 15 billion tokens per minute, and that its AI coding agent Codex hit 3 million weekly users, up from 2 million last month

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Source: FT

Source: FT

The competition between these AI leaders signals a strategic shift as model makers scramble to sign up more enterprises in the belief that businesses will ultimately become a major source of revenue. They're fighting to win over customers not only on model performance but also on utility, integration, and developer tools

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