Skip to content
effecthub

ChatGPT vs Pi

Two fact sheets from our own research, side by side — pricing, platforms, API access and status re-checked by us rather than quoted from the vendors.

The short answer

Free plan
Both — ChatGPT has a free plan, Pi is free to use
Public API
ChatGPT has one; not confirmed by us for Pi
Higher Trust score
ChatGPT — 86 vs 77 for Pi
Best fit
ChatGPT: General knowledge work, drafting, analysis and code across one interface · Pi: People who want to talk through feelings or decisions in a calm tone
Platforms
ChatGPT: Web, iOS, Android, macOS, Windows · Pi: Web, iOS, Android

From our own records as of each tool's last check. Anything we have not confirmed is left out rather than guessed. How we verify

ChatGPTGeneral assistant with tools, memory, files and voicePiInflection AI's conversational companion for talking things through, learning, and keeping track of reminders by text or voice.

Side by side

FactChatGPTPi
CategoryGeneral-purpose AI ChatbotsPersonal AI Assistants
Pricing modelFreemiumFree
Starts at$8/mo—
Public APIYesNot confirmed
Trust score86 / 10077 / 100
PlatformsWeb, iOS, Android, macOS, Windows, APIWeb, iOS, Android
CompanyOpenAIInflection AI, Inc.
Launched2022—
Last verifiedOct 16, 2026Oct 29, 2026

What our research says

ChatGPT

ChatGPT is the default general assistant and the one everyone else is measured against, but the tier you need is rarely the one you first buy. Free is now ad-supported, and the jump to genuinely unlimited reasoning is steep.

Pros

  • Broadest tool surface of any consumer assistant: browsing, code, images, voice, connectors
  • The $8 Go tier closed the gap between free and a $20 commitment
  • Apps on every desktop and mobile platform, not just a web wrapper
  • Model quality is consistently at or near the front of the field

Cons

  • Advertising now appears on the free and Go tiers
  • Message and reasoning limits are opaque and change without notice
  • Tier structure has churned repeatedly, so any price you quote ages fast
  • The API is a separate purchase, which surprises buyers who assume Plus includes it

Pi

Pi suits people who want a patient, friendly conversation partner for thinking aloud, light learning and daily reminders, at no cost. It is the wrong tool for coding, document work or research with sources, where general assistants do far more.

Pros

  • Conversational style tuned for warmth and reflection
  • Voice conversation and memory of earlier chats
  • Free, with apps for iOS and Android
  • Reminders, daily brief and language practice built in

Cons

  • Few productivity features compared with general assistants
  • No file uploads, integrations or API for the consumer product
  • Little public detail on which model versions power it or how often it is updated

Which one fits

Choose ChatGPT if you need

  • General knowledge work, drafting, analysis and code across one interface
  • Anyone who wants file, image, voice and browsing input without assembling tools
  • Teams that need admin controls and data-retention terms via Business or Enterprise
  • Light users who want more headroom than free without paying $20

Choose Pi if you need

  • People who want to talk through feelings or decisions in a calm tone
  • Casual learners who like conversational explanations
  • Users who want simple reminders and a daily brief from a chat app

ChatGPT vs Pi: the questions people ask

Is ChatGPT cheaper than Pi?

Pi is free to use; ChatGPT starts at $8/mo.

Does ChatGPT or Pi have a free tier?

Both: ChatGPT has a free tier, and Pi is free to use.

Which has a public API, ChatGPT or Pi?

ChatGPT ships a public API, as of our last verification. A public API for Pi is not confirmed by us — check its developer docs before you plan an integration.

More comparisons

All ChatGPT alternatives →All Pi alternatives →Browse all General-purpose AI Chatbots →