Tool Directory · AI Assistant / Large Language Model (LLM)

ChatGPT

by OpenAI

A widely known conversational AI assistant powered by OpenAI's GPT models (GPT-5 family as of 2026), capable of generating text, summarizing information, answering questions, and assisting with various language tasks. Useful for general-purpose legal work but carries serious hallucination risks — federal courts have sanctioned attorneys for filing AI-fabricated citations.

Visit website Updated May 2026
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Overview

ChatGPT is a generative AI model accessed via a conversational interface. As of 2026 it runs on OpenAI's GPT-5 family — Plus subscribers get GPT-5.5 (the flagship since April 23, 2026) with GPT-5.3 as a lower-latency fallback, plus access to GPT-5 Thinking for advanced reasoning. The free tier was upgraded in 2026 to include GPT-5-class reasoning rather than the older GPT-3.5. For legal professionals, ChatGPT can assist with initial drafting of non-critical communications, summarizing lengthy documents, explaining complex legal concepts in simpler terms, brainstorming arguments, or generating research queries for dedicated legal databases. However, it is not a specialized legal tool — it lacks legal training, cannot provide legal advice, may generate inaccurate information ("hallucinate"), and its use raises significant confidentiality concerns. In 2026 alone, federal courts issued AI hallucination sanctions including $110,000 (Oregon) and $30,000 (6th Circuit) against attorneys who filed ChatGPT-generated fake citations. Over 35 state bars now require attorneys to verify AI-generated content. Extreme caution and rigorous human review are mandatory for any legal application.

AI capabilities

  • → Natural Language Processing (NLP)
  • → Text Generation
  • → Summarization
  • → Translation
  • → Question Answering
  • → Reasoning (limited by training data)
  • → Multimodality (GPT-4o).

Pricing

Model: Freemium. Free tier with limitations (GPT-5-class on free as of 2026). Paid subscriptions (Plus, Pro, Business, Enterprise) for advanced models, higher usage limits, and enhanced privacy features. API usage is pay-as-you-go.

Pricing details: Free tier available. Plus subscription is $20/month (unchanged for 3+ years; includes GPT-5.5 with 160 messages every 3 hours, GPT-5 Thinking with 3,000 weekly messages, DALL-E image generation, limited Sora video, advanced voice mode, Custom GPTs, and expanded Deep Research). Pro is $200/month. Team/Enterprise pricing requires contacting sales.

Integrations

  • • API allows integration into numerous third-party applications.
  • • GPTs allow custom versions for specific tasks.

What sets it apart

  • ★ Wide accessibility
  • ★ Conversational ease of use
  • ★ Versatility across many tasks
  • ★ Pioneer status in generative AI chat.

Compliance & security

SOC 2 Type II (for Enterprise and API). ISO 27001. GDPR/CCPA compliant.