What Is Anthropic AI and What Do They Do?

Anthropic is an AI safety and research company that builds Claude, a family of large language models used through a website, mobile apps, and a developer API. Founded in 2021, the company positions itself around a specific idea: powerful AI systems should be developed carefully, with safety research built into the process rather than added afterward.

If you've landed here wondering "what is Anthropic AI and what do they do," the short answer is: they research how to make advanced AI systems safer and more reliable, and they turn that research into commercial products — chiefly the Claude models — that people and businesses use for writing, coding, analysis, customer support, and increasingly, autonomous agent workflows.

Who Founded Anthropic and Why

Anthropic was started by Dario Amodei and Daniela Amodei, along with several colleagues who previously worked on AI safety and language model research at OpenAI. The founding premise was that frontier AI capability was advancing quickly, and a dedicated organization was needed to study the risks of increasingly capable models while still building state-of-the-art systems — because understanding those risks in practice requires access to the frontier, not just theoretical research.

That dual focus — cutting-edge model development plus safety research — is what distinguishes Anthropic's public identity from a typical AI product company.

What Anthropic Actually Builds

In practice, Anthropic's output falls into a few categories:

• Claude models — a lineup of large language models (currently spanning different size/speed/capability tiers) used for text generation, coding, reasoning, and multimodal tasks like reading images and documents.
• Claude.ai and mobile apps — consumer-facing chat interfaces where individuals use Claude directly, similar to how people use other AI chat products.
• Claude Developer Platform (API) — a programmatic interface that lets developers send messages to Claude, stream responses, and give the model access to tools, used to embed Claude into apps, backends, and automation.
• Claude Code — a command-line and IDE-integrated coding assistant that can read a codebase, make edits, and run commands.
• Research publications — papers on model interpretability, alignment, and safety evaluation methods, published openly rather than kept purely internal.

The common thread is that almost everything Anthropic ships is downstream of Claude. Unlike some larger AI labs that spread across search, ads, hardware, and cloud infrastructure, Anthropic's business is fairly concentrated: build good models, make them safe and steerable, and sell access to them.

How Anthropic Makes Money

Anthropic's revenue comes primarily from:

1. Consumer subscriptions to Claude.ai (free and paid tiers with higher usage limits and access to more capable models).
2. API usage — developers and companies pay per token for programmatic access to Claude through Anthropic's own API.
3. Enterprise agreements — larger deployments with custom terms, often through cloud marketplace partnerships (Claude is also available via major cloud providers' model catalogs).
4. Investment funding from major technology and venture investors, which subsidizes the enormous compute cost of training frontier models ahead of proportional revenue.

This mixed model — subscription plus usage-based API billing — is fairly standard across the industry, but it creates a practical friction point for developers: consumer Claude subscriptions and the developer API are separate products with separate billing, separate keys, and separate account structures.

Why This Matters If You're Building Something

If you already pay for a Claude subscription and want to build an application, script, or internal tool that calls Claude programmatically, you generally can't just reuse your subscription — Anthropic's direct API requires its own account and its own billing setup, with usage priced per token rather than as a flat monthly fee.

This is the specific gap SubToAPI addresses. Instead of setting up a separate Anthropic API account, SubToAPI turns your existing Claude access into a standard HTTPS API with an application key (sub_live_...), so you can call it from your own code the same way you'd call any other model API — with streaming, tool use, and usage metadata included, and a flat per-seat price instead of unpredictable token billing. Plans start at Solo (€9), with Team and Scale tiers for multiple seats — see /pricing for details, and /docs/quickstart to get a key running in minutes.

Where Anthropic Fits Compared to Other AI Companies

Anthropic is often mentioned alongside OpenAI, Google DeepMind, and Meta's AI research group as one of the labs producing frontier-scale models. A few things tend to differentiate it in practice:

• Safety-first public messaging — Anthropic frequently publishes its safety framework (sometimes called a "responsible scaling policy") describing how it evaluates model risk before wider release.
• Constitutional AI — a training approach Anthropic developed to align model behavior with a written set of principles, rather than relying solely on human feedback labeling.
• Enterprise and coding focus — Claude models have built a strong reputation specifically for coding tasks and long-context document analysis, which shapes a lot of Anthropic's product decisions like Claude Code.

None of this means Anthropic is fundamentally different in business structure from its competitors — it still sells API access and subscriptions like everyone else — but the safety research angle is a genuine part of how the company describes its own mission, not just marketing copy.

Getting Started as a Developer

If you want to actually use Claude in code rather than just read about the company, the practical entry points are:

• Anthropic's own developer API, requiring a separate Anthropic account and per-token billing.
• A layer like SubToAPI if you'd rather turn existing Claude access into a straightforward API with flat pricing — see /docs for the full reference, /docs/messages for basic request/response structure, /docs/streaming for streamed output, and /docs/tools for function/tool calling.

Either path gets you to the same underlying models; the difference is account structure and billing shape.

FAQ

Is Anthropic the same company as OpenAI? No. They're separate companies. Several Anthropic founders previously worked at OpenAI, and both build large language models, but Anthropic operates independently with its own models (Claude) and its own safety research agenda.

What is Claude, exactly? Claude is Anthropic's family of AI models, accessible through a chat website/app, a developer API, and coding tools. It's the primary product Anthropic sells.

Can I use Claude in my own app? Yes, either directly through Anthropic's developer API with a separate account and token-based billing, or through a service like SubToAPI that exposes your Claude access as a standard API with flat per-seat pricing — see /signup to get started.