OpenAI

Anthropic

OpenAI

OpenAI makes money primarily through API access and subscriptions. The API charges developers per token (roughly per word) for using GPT models in their applications.

ChatGPT Plus costs $20/month for individual users, ChatGPT Team is $25-30/user/month, and ChatGPT Enterprise is custom-priced. Microsoft pays OpenAI licensing fees and also resells OpenAI models through Azure OpenAI Service.

OpenAI reportedly generates over $5 billion in annualized revenue as of 2025, growing at an extraordinary rate.

Anthropic

Anthropic makes money through API access and subscriptions, similar to OpenAI. The Claude API charges developers per token for input and output.

Claude Pro costs $20/month for individuals with priority access and higher usage limits. Claude Team is $25-30/user/month for businesses.

Claude Enterprise offers custom pricing with enhanced security, admin controls, and longer context windows. Amazon Web Services resells Claude through Amazon Bedrock and Google Cloud offers it through Vertex AI, both generating revenue-sharing income for Anthropic.

OpenAI

OpenAI was founded in December 2015 as a nonprofit AI research lab. The founding donors — including Elon Musk, Sam Altman, Peter Thiel, Reid Hoffman, and Jessica Livingston — pledged $1 billion with a mission to build artificial general intelligence (AGI) that would benefit all of humanity.

The idea was that AI was too important and too dangerous to leave in the hands of Google alone.

Sam Altman became chairman while Greg Brockman (former CTO of Stripe) became president. Ilya Sutskever, one of the most respected AI researchers alive, left Google Brain to become chief scientist.

The early team was stacked with world-class researchers who published their work openly — hence "Open" AI.

But AI research turned out to be staggeringly expensive. Training large models required millions of dollars in compute.

In 2019, OpenAI created a "capped-profit" subsidiary — investors could earn up to 100x their money, but profits beyond that would flow to the nonprofit. Microsoft invested $1 billion.

The mission was still to save humanity. The method now involved making a lot of money first.

Anthropic

Dario Amodei was VP of Research at OpenAI. His sister Daniela Amodei was VP of Operations.

They were two of the most senior people at the company. In 2020-2021, they grew increasingly concerned that OpenAI was prioritizing commercialization over safety research.

The board crisis that would eventually happen in 2023 was already brewing beneath the surface — the tension between "move fast and ship products" and "slow down and do the safety work" was real.

In early 2021, Dario and Daniela left OpenAI and took a group of key researchers with them. They founded Anthropic as a public benefit corporation — a structure that legally requires the company to consider its impact on society, not just shareholder returns.

The name comes from "anthropic principle" in physics — the idea that the universe's fundamental parameters seem fine-tuned for human existence.

The founding thesis was simple: AI was going to become incredibly powerful whether anyone wanted it to or not. The safest path was to have a safety-focused lab at the frontier of capabilities, not watching from the sidelines.

Build the most powerful AI you can, but build it with safety baked into every layer.

OpenAI

ChatGPT's launch in November 2022 was the growth strategy — it just wasn't planned that way. The team expected a modest research preview.

Instead, ChatGPT hit 1 million users in 5 days and 100 million monthly active users in 2 months, making it the fastest-growing consumer application in history. The product went viral because it felt like magic — for the first time, anyone could have a natural conversation with a machine that seemed to understand them.

The Microsoft partnership provided distribution at massive scale. Microsoft integrated OpenAI models into Bing, Office 365 (Copilot), GitHub (Copilot), and Azure.

Overnight, hundreds of millions of Microsoft users had access to OpenAI technology. Microsoft's $13 billion investment was the largest AI bet in history and gave OpenAI nearly unlimited compute.

The API created an ecosystem. Thousands of startups built products on top of OpenAI's models — from customer service bots to coding assistants to content generators.

Each API customer locked themselves into OpenAI's ecosystem, creating switching costs and recurring revenue.

Anthropic

Anthropic grew through a deliberate "safety as a brand" strategy. While OpenAI chased consumer virality with ChatGPT, Anthropic positioned Claude as the thoughtful, reliable, safety-conscious alternative.

Developers who found ChatGPT inconsistent or who worried about data privacy gravitated to Claude.

The enterprise partnerships were the real growth engine. Amazon invested $4 billion and made Claude the featured AI on Amazon Bedrock.

Google invested $2 billion and integrated Claude into Google Cloud. These partnerships gave Anthropic instant distribution to millions of enterprise developers without building a sales team.

Claude's strength in specific use cases drove adoption. Claude became known as the best AI for long-document analysis, nuanced writing, and careful reasoning.

Law firms, financial analysts, researchers, and enterprise customers who needed accuracy over speed chose Claude. The reputation for quality over flash built a loyal and growing user base.

OpenAI

The board crisis of November 2023 nearly destroyed the company. The nonprofit board fired Sam Altman as CEO on a Friday, citing a loss of confidence.

Within 48 hours, 95% of employees threatened to quit and follow Altman to Microsoft. By Tuesday, Altman was reinstated and the board was restructured.

The incident exposed the fundamental tension between OpenAI's nonprofit governance and its for-profit ambitions — a tension that still hasn't been fully resolved.

The cost of training frontier models is eye-watering. Each new GPT generation costs hundreds of millions to train.

OpenAI is reportedly spending over $7 billion annually on compute. The company is burning through cash faster than almost any startup in history, which is why it keeps raising at higher and higher valuations.

If revenue growth slows before costs stabilize, the math gets ugly.

Safety concerns are not going away. Multiple prominent researchers have left OpenAI over disagreements about the pace of development versus safety research.

Ilya Sutskever, the chief scientist who was central to the board's decision to fire Altman, left in 2024 to start a safety-focused AI lab. The public debate about whether OpenAI is moving too fast — and whether its safety commitments are genuine — grows louder with every capability improvement.

Anthropic

The funding arms race is existential. Training frontier AI models costs billions.

Anthropic has raised $13.7 billion and needs to keep raising because each generation of Claude costs more to train. If a funding round fails or investors lose confidence, Anthropic can't compete at the frontier.

The company is in a spending war with OpenAI (backed by Microsoft) and Google (with DeepMind) — two of the richest companies in history.

Being second in consumer awareness hurts. ChatGPT is a household name.

Claude is not. Most non-technical people have never heard of Anthropic.

This matters because consumer brand recognition drives enterprise adoption — CIOs buy what they've heard of. Anthropic has to fight for mindshare against a competitor with a massive head start in public awareness.

The safety-capabilities tension is real. Anthropic's entire brand is built on being the "safe" AI company.

But to stay competitive, they must build increasingly powerful models. Every capability improvement creates new risks.

If Anthropic ships something that causes harm, the reputational damage is catastrophic because safety is their core promise. If they move too slowly, they become irrelevant.

OpenAI

ChatGPT is the consumer chatbot — the product that made AI mainstream overnight. GPT-4o is the flagship multimodal model that handles text, images, and audio.

The OpenAI API lets developers integrate GPT into any application. DALL-E generates images from text descriptions.

Whisper transcribes and translates audio. Sora generates videos from text prompts.

GPT Store lets users create and share custom GPT agents. ChatGPT Enterprise gives businesses a private, secure version of ChatGPT with admin controls and no data training.

Anthropic

Claude is the flagship AI assistant — available via web app, mobile app, and API. Claude excels at long-document analysis, coding, writing, and reasoning.

Claude's context window handles up to 200,000 tokens (roughly 500 pages) — dramatically more than most competitors. The Claude API lets developers build applications powered by Claude.

Claude for Enterprise provides businesses with a private, secure deployment. Constitutional AI is Anthropic's research framework for training AI systems to be helpful, harmless, and honest — the safety methodology that differentiates Claude from competitors.

OpenAI

Microsoft ($13B), Thrive Capital, Khosla Ventures, Sequoia Capital, Founders Fund, Tiger Global, SoftBank, a16z

Anthropic

Google ($2B+), Amazon ($4B), Spark Capital, Salesforce, Menlo Ventures, SK Telecom, Lightspeed