Claude is the AI assistant made by Anthropic, an AI safety company founded in 2021 by former OpenAI researchers. Since Claude 2 debuted publicly in 2023, it has become the assistant of choice for writers, analysts, lawyers and developers who prize careful, nuanced, well-structured answers.
A family of models
Anthropic releases Claude in tiers named for chess:
| Tier | Character | Best for |
|---|---|---|
| Haiku | Smallest and fastest | Quick tasks, classification, high-volume work |
| Sonnet | Balanced speed and intelligence | Everyday writing, analysis, coding |
| Opus | Most capable, deepest reasoning | Complex analysis, research-grade tasks |
You can use Claude at claude.ai on the web and mobile apps, through the Anthropic API and console, and inside enterprise tools like Amazon Bedrock and Google Cloud’s Vertex AI.
What Claude is known for
- Long context: Claude can read entire books, codebases and contract sets in one go — context windows of 200K tokens and beyond.
- Nuance and honesty: it hedges appropriately, flags uncertainty and avoids over-claiming.
- Coding: consistently top-tier at writing, explaining and fixing code — including through Anthropic’s agentic coding tool, Claude Code.
- A distinctive voice: warm, direct prose that many writers prefer as a first draft.
First-weekend exercise: paste the longest document you have into a chat with Claude and ask for a one-paragraph summary, a list of risks and three questions a careful reviewer would raise. Note how it handles structure.
Enjoying the preview? Unlock the full Claude course — 5 more lessons, exam & certificate.
Unlock for ₱200.00 →