Pi
pi.ai
Inflection AI's personal AI — a supportive, knowledgeable conversational companion for everyday life.
Quick Information
- Category:
- Writing & Chat
- Pricing:
- Free
- Platforms:
- Web, iOS, Android
- Free Plan:
- Yes
- API Available:
- Yes
- Last Verified:
- September 2026
What Is Pi?
Pi (from Inflection AI) is a personal, empathetic conversational AI assistant that remains completely free for all personal users as of 2026, with no paid subscription plans on the consumer side — unlimited conversations, voice chat with 8 voice options, real-time web search, and cross-platform access are all available at no charge.
A genuinely significant company history detail worth understanding: following a Microsoft acqui-hire in March 2024, Inflection's founders and most staff left the company, and by October 2024 Inflection pivoted to enterprise solutions with monetization moving off the consumer Pi app entirely — meaning the free consumer product continues, but the company's actual business focus and revenue now come from enterprise and API access rather than Pi itself. For developers, the underlying Inflection 3 Pi model is available via API (e.g., through OpenRouter) at $2.50 per million input tokens and $10 per million output tokens with an 8K context window.
It's aimed at individuals wanting a free, personal conversational AI companion focused on empathetic conversation rather than task-oriented productivity, with the completely free consumer access continuing even after Inflection's 2024 pivot to enterprise monetization — developers wanting programmatic access to the underlying model should expect to pay via the separate API pricing rather than assuming the free consumer experience extends to API use. See our Writing & Chat tools directory for related conversational AI tools like Kuki and Character.AI.
What Can You Use Pi For?
Personal conversational AI
Engages in personal, empathetic conversation for free.
Voice chat companionship
Uses voice chat with 8 voice options for conversational interaction.
API-based model access
Integrates the Inflection 3 Pi model into applications via API, billed per token.
Pi Features
- Unlimited free conversations — Provides unlimited conversations at no charge for personal users.
- Voice chat — Offers voice chat with 8 voice options.
- Real-time web search — Incorporates real-time web search into conversations, included free.
- Inflection 3 Pi API — Provides developer API access to the underlying model, billed per token.
Who Is Pi For?
- Individuals — Uses a completely free, personal conversational AI companion.
- Developers — Integrates the Inflection 3 Pi model into applications via the paid API.
Pi Pros & Limitations
What We Like
- Genuinely completely free for personal use, with unlimited conversations and no subscription plans
- Includes voice chat and real-time web search at no charge
- Consumer product remains free even after the company’s 2024 pivot to enterprise monetization
Limitations
- Inflection pivoted to enterprise solutions in October 2024, moving monetization off the consumer app entirely
- Founders and most staff left following the March 2024 Microsoft acqui-hire, raising questions about long-term consumer product investment
- Developer API access is billed separately per token, not covered by the free consumer experience
Pi Pricing
| Plan | Price | Main Features |
|---|---|---|
| Personal (consumer) | $0 | Unlimited conversations, voice chat, real-time web search |
| Inflection 3 Pi API | $2.50/$10 per million input/output tokens | 8K context window, developer integration |
Pricing was last verified September 2026. Check the official website for the latest pricing.
AI Listing Jungle Ranking
- Global Rank:
- #5
- Overall Score:
- 95.1/100
- Monthly Users:
- 6M+
- Rank Change:
- ▲ 1
This ranking reflects AI Listing Jungle's own independent scoring methodology and is not an endorsement by Pi or its company. How Our Rankings Work
Frequently Asked Questions
Is Pi free?
Yes, completely free for personal use with unlimited conversations, voice chat, and web search.
What happened to Inflection AI?
Following a March 2024 Microsoft acqui-hire, founders and most staff left, and the company pivoted to enterprise solutions in October 2024.
Is the consumer Pi app still maintained?
It remains free and available, though the company’s business focus has shifted to enterprise monetization.
How much does API access cost?
$2.50 per million input tokens and $10 per million output tokens for the Inflection 3 Pi model.
Our Take
Pi's continued completely free consumer access is notable given that Inflection AI's actual business focus shifted entirely to enterprise monetization after the 2024 Microsoft acqui-hire and staff departure.
Developers wanting programmatic access should budget for the separate per-token API pricing, since it's entirely distinct from the free consumer chat experience.
Pi Alternatives
Pi Comparisons
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