ChatGPT (GPT)

ChatGPT is OpenAI's consumer and enterprise AI assistant powered by the GPT (Generative Pre-trained Transformer) family of large language models. As of April 2026, the flagship model is GPT-5.5 (released 23 April 2026), with GPT-5.5 Pro available to Pro/Business/Enterprise subscribers and a tightly integrated Codex coding agent. GPT-5.5 is OpenAI's most capable agentic model to date, with major gains in software engineering, computer use, multi-step task execution, and scientific research workflows — capable of moving across applications and tools to complete entire tasks autonomously. The lineage includes GPT-3.5 (2022), GPT-4 (2023), GPT-4o (2024 — native multimodal text/audio/image), GPT-5 (2025), and now GPT-5.5. ChatGPT is delivered via the web app, mobile apps, native desktop apps, and the OpenAI API, with paid tiers (Plus, Pro, Business, Enterprise) unlocking the latest models, longer context, and agent features. Example: A Web3 protocol team uses ChatGPT with GPT-5.5 Pro to spec a new staking module, draft the Solidity implementation, run static analysis through Codex, generate the audit report, and produce the user-facing documentation — all in a single threaded session that the agent executes across files and tools without manual intervention. Why it matters for AI and data in Web3: ChatGPT is the most widely deployed AI assistant in Web3 product, research, and operations workflows. GPT-5.5's agentic computer-use and coding capabilities materially compress the development cycle for smart-contract systems, on-chain analytics, and compliance automation, reshaping how Web3 teams ship and audit code.

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