Our take

The default starting point for most people — Deep Research and agent features keep pushing what a chat assistant can do.

What it is

ChatGPT is OpenAI’s flagship conversational assistant. Beyond chat, it now includes web browsing, code execution, image generation, the GPTs marketplace, Deep Research (long-running research agents), and Operator-style browser agents on higher tiers. It is the most widely used AI assistant in the world.

Best for

General Q&A and writing
Deep Research across the web over many minutes
Running small automations via GPTs

Pros

Broadest capability set of any single assistant
Massive ecosystem of custom GPTs
Constantly updated with new agent features

Cons

Generalist — specialists beat it on narrow tasks
Higher tiers (Pro, Operator) are expensive

Quick start

Go to chatgpt.com (or chat.openai.com) — sign up free with email or Google.
Free tier runs GPT-4o mini with caps; ChatGPT Plus ($20/mo) unlocks GPT-4o, o-series reasoning, image generation, longer uploads.
Pro tier ($200/mo) adds Operator (browser agent), Sora, Codex agent, and unlimited o-series.
Click "GPTs" in the sidebar → explore the marketplace or build your own; pin your favorites to the top.
For research, click "Deep Research" → ask a complex question; it browses 20+ sources and returns a cited report in 5–30 min.
Use Custom Instructions to lock in tone + format across all chats; turn Memory on to persist facts between sessions.

Sample input / output

Input

Deep Research task:
"Compare the pricing models and quota enforcement of ChatGPT Pro ($200/mo) vs Anthropic Max ($200/mo) vs Gemini Ultra as of July 2026.

For each: list actual monthly cap structure, rate limits per hour, what's throttled vs hard-stopped, and which tier is best for someone running 2 concurrent agents 8h/day."

Plus a side input: paste the latest Anthropic pricing PDF.

Output

Deep Research completed in 11 min, 28 sources cited.
Report structure:
  - Direct comparison table (Pro / Max / Ultra)
  - Rate-limit breakdown: GPT Pro 200 msg/3h on o3; Max 200 msg/5h on Sonnet 4; Ultra 1.5× Pro
  - Cost per 8-hour agent runtime estimate ($9.40 Pro / $11.20 Max / $12.80 Ultra)
  - Recommendation: Pro for breadth; Max for quality + 1M context
Final report: 4,200 words, with inline citations and 1-click export to PDF / Google Doc.

Benchmarks

WAU 500M+ users (April 2026) — OpenAI press, Apr 2026

Plus / Pro plans $20 / $200 per month — OpenAI pricing

Deep Research speed 5–30 minutes for cited report — OpenAI

GPTs in marketplace 3M+ custom GPTs — OpenAI Devday 2025

Context window 128K (4o) / 200K (4.1) / 1M select — OpenAI docs 2026

Operator (browser agent) Pro tier, USA / EU rollout — OpenAI

Pricing

Free; Plus $20/mo; Pro $200/mo

Underlying models

GPT-4oGPT-4.1o-series reasoning models

Should you pick this?

Pick it if You want the broadest single-assistant capability set — chat, image gen, code execution, browsing, Deep Research, custom GPTs — backed by the largest 3rd-party ecosystem.

Skip it if You're already paying for Anthropic and value long-context safety steerability more than raw breadth (Claude wins on writing quality), or you want a fully open-weights stack (DeepSeek / Qwen).

ChatGPT