OpenAI is closing the gap with Anthropic among business users, according to surprising new data from corporate expense management platform Ramp. The findings, released August 20, 2026, show that while Anthropic still holds the lead, OpenAI's growth rate has accelerated in Q3 — fueled largely by the success of GPT-5.6 Sol.
The Numbers: A Shifting Market
Ramp's data covers more than 70,000 American businesses that spend billions through its bill pay and corporate card products. Here's what the latest figures reveal:
- Anthropic's share: Nearly 44% of business AI spending as of July 2026
- OpenAI's share: Nearly 40% and growing faster in Q3 to date
- Market expansion: Over 56% of Ramp's business customers now pay for AI, up from 50% in March
OpenAI lost the lead among Ramp's paying business users back in May 2026, when Anthropic hit 41% market share to OpenAI's 39%. The ChatGPT maker has never regained that lead — but the gap is narrowing.
Why GPT-5.6 Sol Is Driving OpenAI's Comeback
Ramp economist Ara Kharazian pointed to GPT-5.6 Sol as the key factor behind OpenAI's renewed growth. "GPT-5.6 Sol is really good, increasingly the choice for developers," Kharazian posted on X. The model, launched in July 2026, has been praised for its coding capabilities, reasoning performance, and competitive pricing.
Meanwhile, Anthropic's higher-end model tier, Claude Fable 5, has faced headwinds. "Fable 5, meanwhile, disappointed both in adoption and real-world application given price + data retention requirements imposed by regulators," Kharazian noted. Anthropic caused outrage when it warned Fable users that it must retain their data for 30 days — a requirement that turned off privacy-conscious enterprise customers.
The Bigger Picture: Enterprise AI Spending Is Volatile
The Ramp data reveals something more fundamental about the AI market: enterprise spending is remarkably fluid. Businesses are willing to switch providers as each lab releases new models, a volatility that should give both companies' investors pause about how "sticky" enterprise AI spending really is.
This isn't a measure of the total market. It excludes large enterprises that use spend-management tools from providers like American Express. But it's enough data to show that no provider has locked in permanent dominance.
Key Takeaways for Businesses
- Don't lock in to a single provider — The market shifts every quarter as new models launch
- GPT-5.6 Sol is winning developer mindshare — Its combination of performance and pricing is compelling
- Data retention policies matter — Anthropic's 30-day retention requirement for Fable 5 hurt adoption
- The overall market is growing — Even as providers compete for share, more businesses are adopting AI
The Ramp Router Connection
In a related development, Ramp itself launched its own AI model router, called Router, on August 20, 2026. The service lets users and companies use and switch between various large language models through an API — similar to OpenRouter, which Stripe recently acquired for $7B+.
Router offers access to models from OpenAI, Anthropic, DeepSeek, Moonshot, MiniMax, Nvidia, xAI, and Z.ai. It provides several "strategies" to help customers route AI requests to models based on their preferences, including flex usage tiers and benchmark-based routing.
The service is free to use for the remainder of 2026 (users still pay for AI model inference costs) and comes with a $26 credit launch offer. This move by Ramp underscores the industry trend toward multi-model adoption — businesses don't want to be locked into a single AI provider.
What This Means for the AI Industry
The data suggests several important trends:
- The enterprise AI market is far from settled — Despite Anthropic's lead, OpenAI's resurgence shows how quickly fortunes can change
- Model quality drives adoption — GPT-5.6 Sol's launch directly correlated with OpenAI's growth acceleration
- Pricing and data policies are competitive differentiators — Anthropic's data retention requirement for Fable 5 created an opening for competitors
- Infrastructure players are becoming AI gateways — Ramp's Router launch follows Stripe's OpenRouter acquisition, showing that payment and expense platforms see AI routing as a strategic capability
The Road Ahead
With both OpenAI and Anthropic reportedly planning IPOs, these market share battles take on added significance. The company that can demonstrate consistent enterprise growth will command a higher valuation.
For businesses, the message is clear: the AI market is competitive, models are improving rapidly, and flexibility in provider choice is more valuable than ever. Platforms like Qubax AI that offer access to multiple models through a single API are becoming essential infrastructure for companies that want to avoid vendor lock-in.
As Kharazian noted, there's still a month left in Q3 — "and that's like 30 AI years." The trend could shift again before the quarter is over. But for now, the data shows that OpenAI is back in the game.
Want to compare GPT-5.6 Sol and Claude Opus 5 side by side? Check out [Qubax AI's model marketplace](https://qubax.ai/models) for real-time pricing and API access to both models.
FAQ
Q: Who is winning the enterprise AI market — OpenAI or Anthropic?
A: As of July 2026, Anthropic holds nearly 44% of business AI spending among Ramp's customers, compared to OpenAI's nearly 40%. However, OpenAI is growing faster in Q3 2026, driven by the success of GPT-5.6 Sol.
Q: What is GPT-5.6 Sol?
A: GPT-5.6 Sol is OpenAI's latest flagship model, launched in July 2026. It has been praised for its coding capabilities, reasoning performance, and competitive pricing, making it increasingly popular among developers.
Q: Why did Anthropic lose momentum?
A: Anthropic's higher-end model, Claude Fable 5, faced adoption challenges due to its high price and a data retention requirement that mandates storing user data for 30 days. This turned off privacy-conscious enterprise customers.
Q: What is Ramp Router?
A: Ramp Router is an AI model routing service launched by Ramp on August 20, 2026. It lets users switch between various LLMs through a single API, similar to OpenRouter. It's free for the remainder of 2026.
Q: How can businesses avoid vendor lock-in with AI providers?
A: Businesses can use multi-model platforms like Qubax AI that offer access to multiple AI models through a single API, allowing them to switch providers as the market evolves.
Q: What percentage of businesses now pay for AI?
A: According to Ramp's data, over 56% of their business customers now pay for AI, up from 50% in March 2026. This shows the overall market is expanding rapidly.
