Pi (Inflection AI)
Inflection AI launched Pi in May 2023 as a 'kind and supportive' chatbot built on its own Inflection-2.5 model, raising $1.3B at a $4B valuation. In March 2024 Microsoft hired CEO Mustafa Suleyman, co-founder Karen Simonyan, and most research staff in a $650M licensing deal that left Inflection a hollowed-out shell. Pi still loads and answers messages, but new models are not in active training and the company pivoted to enterprise AI services.
Why Abandoned
Microsoft hired the founders and most researchers in March 2024 for $650M; Inflection pivoted to enterprise services. Pi still loads but is not the company's priority.
ðĐš Health Signals
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ð Timeline
Pi launches
https://inflection.ai/press
Raises $1.3B at $4B valuation
https://www.cnbc.com/2023/06/29/inflection-ai-startup-from-deepmind-linkedin-veterans-raises-1point3-billion.html
Microsoft hires Suleyman and core team for $650M
https://www.theinformation.com/articles/microsoft-agreed-to-pay-inflection-650-million-while-hiring-its-staff
ð Alternatives to Pi (Inflection AI)
Character.AI
ðĒActivePlatform for creating and chatting with AI characters with distinct personalities.
ChatGPT
ðĒActiveOpenAI's conversational AI assistant that sparked the generative AI revolution.
Claude
ðĒActiveAnthropic's AI assistant known for being helpful, harmless, and honest.
ðŠĶ Other dead chat tools
Babylon Health
ðīShutdown / DeadBabylon Health was a UK telehealth and AI symptom-checker company that went public via SPAC in 2021 at a $4.2B valuation. Its 'AI doctor' chatbot drew regulatory scrutiny from the UK MHRA over accuracy claims. After delisting from the NYSE and an attempted private rescue in 2023, the US subsidiary filed Chapter 7 bankruptcy in August 2023 and the UK operation went into administration. The brand and apps are gone.
Forefront AI
ð Possibly DeadForefront launched in 2022 as a free playground for chatting with GPT-3.5, GPT-4, Claude, and image models in one interface. It briefly trended on Hacker News and Product Hunt and built a free-tier audience before paid alternatives like Poe and Perplexity captured the market. Forefront's chat app stopped accepting new signups in mid-2024 and the company pivoted toward enterprise data products. The original consumer site no longer functions.
â Frequently Asked Questions
Is Pi still working?
Yes. Pi.ai still answers messages. But the founding team and most researchers left for Microsoft in March 2024 and the model is no longer being meaningfully trained.
Where did the Inflection team go?
Mustafa Suleyman became CEO of Microsoft AI; most of the research org joined him. Inflection retained a smaller commercial team.
Is Inflection-2.5 still being updated?
Inflection has shifted to selling enterprise services on Inflection-2.5 and partner models rather than racing on consumer chat performance.
What killed Pi's growth?
Free GPT-4 and free Claude erased Pi's quality moat, and the founder departure killed the roadmap that might have kept it competitive.