Andrej Karpathy (@karpathy) — Twitter Score 847 out of 1000

Andrej Karpathy is an AI researcher who works at Anthropic leading a team for research in pretraining, and founded Eureka Labs, an AI-native education company announced on July 16, 2024 via X with the LLM101n undergraduate AI course as its first product. Andrej Karpathy's Twitter Score is 847 out of 1000 (an Excellent rating) as of July 2026.

Andrej Karpathy was one of the founding members of OpenAI in 2015, joining as part of the initial research team assembled at the organization's launch, and later returned to OpenAI in February 2023 to build a new team working on midtraining and synthetic data generation before departing in February 2024. He previously worked at Tesla as Director of AI and Autopilot Vision. Named to TIME's 100 Most Influential People in AI list in 2024, he coined the term "vibe coding" in February 2025 to describe building apps and websites by typing prompts to AI tools.

Andrej Karpathy published "A from-scratch tour of Bitcoin in Python" in June 2021, implementing Bitcoin transaction creation, signing, and broadcasting in pure Python with zero dependencies, and maintains the open-source "cryptos" GitHub repository, a pure Python, from-scratch, zero-dependency Bitcoin implementation covering keys, ECDSA, transactions, blocks, and a lightweight node. He has described blockchain as extending open source to "open source + state," calling it a genuine computing paradigm innovation with Bitcoin as the starting point.

Who follows Andrej Karpathy on X?

Andrej Karpathy is followed by 3,860 founders, 753 angel investors, 1,530 influencers and 91 VCs, among them Balaji, Brian Armstrong, Chris Dixon, Elon Musk, Marc Andreessen and Sam Altman. He is mentioned by 484 accounts in 1,655 posts. With 3,276,636 followers as of July 2026 and 10,124 posts, Andrej Karpathy ranks #48 (top 0.1%) of 389,587 accounts on TwitterScore.