ChatGPT

ChatGPT is an AI chatbot developed by OpenAI. Launched in November 2022, it became the fastest-growing consumer application in history, reaching 100 million users within two months. It demonstrated to a mass audience that AI could hold conversations, write content, explain concepts, and assist with work tasks at a useful level of quality.

What ChatGPT does

ChatGPT takes text input (prompts) and generates text output (responses). It can:

• Answer questions on virtually any topic
• Write and edit text (emails, articles, reports, creative writing)
• Summarise long documents
• Translate between languages
• Write and debug code
• Analyse data and create visualisations
• Brainstorm ideas and provide feedback
• Process images and generate images (with DALL-E)

The technology behind it

ChatGPT is built on OpenAI's GPT (Generative Pre-trained Transformer) models. The versions have evolved rapidly:

• GPT-3.5: The original ChatGPT model. Capable but prone to errors.
• GPT-4: A significant quality leap with better reasoning, fewer hallucinations, and multimodal capabilities (text + images).
• GPT-4o: Optimised for speed and efficiency while maintaining GPT-4 quality.
• o1/o3 series: Models with explicit reasoning capabilities for complex problem-solving.

Free vs paid tiers

• Free tier: Access to GPT-4o mini with usage limits
• Plus ($20/month): Higher usage limits, access to the latest models, image generation, and advanced features
• Team and Enterprise: Business-focused plans with data privacy protections, admin controls, and higher limits

Strengths

• Enormous user base and ecosystem (plugins, GPTs, API)
• Regular model improvements
• Multimodal capabilities (text, images, code, data)
• Extensive third-party integrations

Limitations

• Hallucinations — generates confident but incorrect information
• Knowledge cutoff — does not know about very recent events without browsing
• Context limits — cannot process very long documents in a single conversation
• Privacy considerations — conversations may be used for training unless opted out

ChatGPT in the workplace

ChatGPT is widely used for drafting emails, summarising documents, brainstorming, coding assistance, and research. For business use, the Team and Enterprise plans provide data protection and admin controls that the free tier does not.

How it compares

ChatGPT is one of several major AI assistants. Claude (Anthropic), Gemini (Google), and others offer similar capabilities with different strengths. Claude is often noted for nuanced writing and safety. Gemini integrates with Google's ecosystem. The best choice depends on your specific needs and existing tools.