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Anthropic Overtakes OpenAI in Business AI Spending

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anthropic openai dario amodei enterprise ai ai-business enterprise-ai

Key insights

  • Ramp tracks real corporate card and invoice spend, not surveys, giving this crossover more evidentiary weight than typical AI market share claims.
  • Anthropic quadrupled its business adoption share in roughly twelve months; OpenAI added only 0.3 percentage points over the same period.
  • The Rundown AI reports Fidji Simo had already sounded a 'code red' warning about Anthropic's enterprise trajectory before the crossover became public.

Why this matters

Ramp's May 2026 AI Index, drawn from actual corporate card and invoice transactions across more than 50,000 US businesses, recorded Anthropic at 34.4% business adoption against OpenAI's 32.3%, the first time Anthropic has held the lead in the dataset. Multiple independent outlets confirmed the shift simultaneously, and The Rundown AI reported that OpenAI CEO Fidji Simo had already issued internal 'code red' warnings about Anthropic's enterprise trajectory before the crossover occurred. FourWeekMBA identified a structural dimension beyond share-stealing: Anthropic is converting businesses that never previously paid for any AI tool directly to Claude, bypassing OpenAI entirely. Ramp's own economists and downstream analysis converge on three headwinds that could erase the lead: pricing dynamics that punish expensive models, service degradation under heavy demand, and open-source alternatives narrowing the justification for Claude's premium.

Summary

Anthropic claimed 41% of business AI subscription spending in May 2026, edging past OpenAI's 39.5%, according to Ramp data covering more than 70,000 businesses. The milestone arrived while Anthropic was in open conflict with the Trump administration, which sent a letter demanding it ban non-Americans from accessing Mythos 5 and Fable 5, its most advanced models. In March, the administration had already designated the company a supply-chain risk. Essentially: (Anthropic, OpenAI) the government pressure campaign is coinciding with Anthropic's strongest commercial run on record. - Ramp's lead economist Ara Kharazian noted that Anthropic's best business adoption month was the same month the DoD applied the supply-chain risk label. - Claude Code and Opus API calls for coding tasks are the primary enterprise spending drivers. - Anthropic also filed confidential IPO paperwork and reported its first profitable quarter in the same period. Enterprise adoption is rising in lockstep with political friction, not despite it.

Potential risks and opportunities

Risks

  • If the Trump administration's demand to ban non-Americans from Mythos 5 and Fable 5 is enforced broadly, it could dampen Anthropic's enterprise share growth in the months following the May 2026 record.
  • OpenAI could reclaim the market-share lead if Anthropic's most capable models, Mythos 5 and Fable 5, remain restricted or unavailable to a broad enterprise audience beyond May 2026.
  • A supply-chain risk designation converted into federal procurement rules could block Anthropic from government contracts at the moment it is approaching an IPO at a $965 billion valuation.

Opportunities

  • Anthropic's growing enterprise lead creates leverage to expand Claude Code's position in developer toolchains, as businesses with existing Opus API integrations face meaningful switching costs to return to OpenAI.
  • The Trump administration conflict could function as a credibility signal for enterprise security buyers outside the US, reinforcing Anthropic's positioning as an independent actor rather than a government-aligned vendor.
  • Ramp's tracking of AI subscription spending across 70,000+ businesses is establishing a new market-intelligence standard, creating a data product opportunity for other enterprise spend platforms to build similar AI vendor share indices.

What we don't know yet

  • Whether the Trump administration's demand to ban non-Americans extends to Anthropic's API customers broadly, and how Anthropic plans to comply or contest that requirement.
  • Whether the spending split between Anthropic and OpenAI will shift after June, given that Fable 5's public release on June 9, 2026 falls entirely outside the May Ramp dataset.
  • The status of Anthropic's confidential IPO timeline and whether the ongoing government conflict will affect its trajectory toward the $965 billion valuation.

What others are reporting

Coverage cluster as of 8h after publish

  1. Ramp Read →

    First-party source: the actual index underlying all downstream coverage, tracking April 2026 corporate spend across 50,000+ US companies.

    Anthropic passed OpenAI in business adoption for the first time, according to our latest release of Ramp AI Index.
  2. Axios Read →

    Tier-1 outlet covering the crossover on the same day Ramp published its index, framing this as a workplace AI adoption shift.

  3. VentureBeat Read →

    Frames the crossover alongside three specific structural risks, independently arriving at the same threat taxonomy as Ramp's own economists.

  4. The Rundown AI Read →

    Reports Fidji Simo had flagged an internal 'code red' on Anthropic's enterprise rise, framing the Ramp data as confirmation of a known internal threat.

    Anthropic rose 3.8% in April to 34.4% of adoption, while OpenAI fell 2.9% to 32.3%
  5. FourWeekMBA Read →

    Identifies 'never-adopter' conversions as a structural driver: businesses going to Claude without ever paying for OpenAI, not just incumbent churn.

    Anthropic is now driving new AI adoption among businesses that had never used AI before — 'never-adopters' converting directly to Claude.
  6. MindStudio Read →

    Adds a structured product comparison across context window, coding performance, and hallucination rates to explain why enterprise buyers shifted.

    For the first time, Anthropic has overtaken OpenAI in business adoption... with Anthropic capturing 34.4% of AI tool spending share compared to OpenAI's 32.3%.

Originally reported by techcrunch.com

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Original headline: Anthropic Overtakes OpenAI in Business AI Spending for the First Time, Ramp Data Shows