ChatGPT
The world's most-used AI assistant — now powered by GPT-5.5
ChatGPT remains the most widely used AI assistant in 2026, now running on GPT-5.5 (launched April 23, 2026). The Plus tier at $20/month unlocks GPT-5.5 with a 160-message/3-hour cap, DALL-E image generation, Sora video, advanced voice mode, and Deep Research. The Pro tier ($200/mo) adds the GPT-5.5 Pro reasoning model and a 1-million-token context window. With 800M+ weekly active users, ChatGPT is still the default AI tool for most people.
Pros
- GPT-5.5 reasoning leads on multi-step coding and math benchmarks
- Free tier includes GPT-5.5 Instant with 10x fewer limits than older free plans
- 1M-token context window on Pro fits entire codebases and books
- Deep Research runs 250 autonomous web searches/month on Pro
- Best multimodal stack: text, image, voice, code, and Sora video in one app
Cons
- Pro plan at $200/mo is 10x the Plus price for the 1M context and Pro reasoning
- Heavy free-tier usage still hits rate limits during peak hours
- Subscriptions cannot be used with third-party agent frameworks like OpenClaw