Our take

Best-in-class for long documents and thoughtful writing — the agent you reach for when quality matters more than speed.

What it is

Claude is Anthropic’s conversational assistant. It is known for a very large context window, careful and nuanced outputs, strong coding ability (which powers Claude Code), and the Artifacts feature for generating interactive content. Anthropic positions it as a safer, more steerable assistant.

Best for

Analyzing very long documents (books, codebases)
High-quality writing and editing
Building interactive artifacts (UIs, docs, diagrams)

Pros

Excellent long-context handling
Nuanced, high-quality prose
Strong safety and steerability

Cons

Smaller third-party ecosystem than OpenAI
Peak usage can require Max tier

Quick start

Go to claude.ai — sign up free with email or Google (no phone required).
Free tier: Claude Sonnet 4 with reasonable rate limits; Pro $20/mo unlocks more capacity + Projects + Artifacts.
Max $100–200/mo (US $200): highest priority, 1M-token context windows, and both Sonnet 4 + Opus 4.
Click "+ New chat" for one-off; "+ Project" gives you a workspace with shared context, custom instructions, and uploaded docs.
In Projects, drag in PDFs / codebases / spreadsheets — Claude reads them across turns. Use Artifacts for live HTML/SVG/React that renders side-by-side.
For coding, install Claude Code in your terminal — separate CLI but the same Anthropic account; it edits files and runs shell commands with your approval.

Sample input / output

Input

Project context (uploaded):
  - 600-page product spec PDF
  - 3 architecture diagrams (PNG)
  - Past 4 quarterly OKRs as a CSV

System prompt override (per Project):
  "You are the principal product partner. Push back on vague asks. Cite section numbers when answering about the spec. Keep responses under 300 words unless you're producing a doc."

Question: "Where does the spec address agent fallback between regions 1 and 2?"

Output

Answer (under 120 words, with citation):
"Spec §4.7 covers the primary fallback path (region 1 → 2).
The 7-second health-check threshold comes from §11.2. If region 2 is degraded for >15 min, §4.8 routes to region 3 — though your Q3 OKR noted that region 3 is cost-per-request 4× region 1.
Recommendation: re-check §11.2 thresholds against your Q2 actuals (CSV row 14)."

Followed up automatically: Artifact renders the architecture diagram from §4.7 as an inline SVG.

Benchmarks

Context window 1M tokens (Sonnet 4 / Opus 4) — Anthropic, Aug 2025 launch

Plans Free / Pro $20 / Max $100–200 (US $200) per month — Anthropic pricing

SWE-bench Verified (Opus 4) 72.5% (SOTA, May 2026) — Anthropic May 2026

Long-doc comprehension Top performer on FrontierMath / multi-doc QA — Anthropic 2026 disclosures

Anthropic API run-rate (2025) $3B+ (end of 2025, est.) — Anthropic earnings disclosures

Pricing

Free; Pro $20/mo; Max $100–200/mo

Underlying models

Claude SonnetClaude OpusClaude Haiku

Should you pick this?

Pick it if You need thoughtful long-context reasoning on serious work — long-document analysis, nuanced writing, careful code review — and you prefer safety/steerability defaults built in.

Skip it if You need the broadest one-stop assistant (ChatGPT has more native features and ecosystem), or you need fully open/self-hostable weights (DeepSeek / Qwen).

Claude (Anthropic)