OpenAI

Generative AI

OpenAI holds the largest distribution in consumer and developer generative AI by a wide margin. ChatGPT crossed 900 million weekly active users by February 2026, and OpenAI's annualized revenue reached roughly $20 billion by the end of 2025, tripling from about $6 billion the year before. The company closed a $122 billion funding round in March 2026 at an $852 billion valuation, and more than 90% of Fortune 500 companies now use ChatGPT in some form.

OpenAI's enterprise position has grown more contested even as its consumer reach has grown. Independent survey data now shows OpenAI holding roughly 27% of enterprise LLM API spend, down from 50% in 2023, as Anthropic gained enterprise share over the same period. OpenAI remains the company every generative AI conversation starts with, and GPT-5's 400,000-token context window keeps it competitive on raw model capability.

Assessed at #1 in Top 10 Generative AI Companies to Know in 2026.

Where this firm appears

• Best generative AI consulting companies Ranking · 23 September 2026
• Top 10 generative AI companies to know in 2026 Ranking · 23 September 2026
• Enterprises consolidate from four LLM vendors to two News · 16 September 2026
• Mistral raises 3 billion euros at a 21 billion euro valuation News · 8 September 2026
• Anthropic closes a 65 billion dollar round at a 965 billion valuation News · 28 May 2026
• OpenAI closes a 122 billion dollar round at an 852 billion valuation News · 31 March 2026

Sources

1. Top 10 Generative AI Companies to Know in 2026
2. OpenAI, official site