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Sergei Parfenov profile picture

Sergei Parfenov

AI Engineer and CTO. Model, pipeline, product. I build the whole thing, solo. I write what worked and what broke.

Location Barcelona Joined Joined on  Personal website https://github.com/P0rt github website

Education

Stanford

Work

CTO at Aliwio

4 Week Community Wellness Streak
2 Week Community Wellness Streak
1 Week Community Wellness Streak
Writing Debut
Seven Year Club
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'World Models' Will Be the Next Buzzword. The Man Saying That Just Raised $1B to Build One

'World Models' Will Be the Next Buzzword. The Man Saying That Just Raised $1B to Build One

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Comments 1
8 min read

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Autonomy Is the Bug: Why Self-Driving Agents Hallucinate When the Model Barely Does

Autonomy Is the Bug: Why Self-Driving Agents Hallucinate When the Model Barely Does

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Comments 3
8 min read
'Local' Solves Where Your Data Goes. It Doesn't Solve What Your Agent Does

'Local' Solves Where Your Data Goes. It Doesn't Solve What Your Agent Does

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Comments 14
8 min read
My Strawman Baseline Beat My Own Scheme on Half the Gate Classes

Prose summaries vs structured compaction

My Strawman Baseline Beat My Own Scheme on Half the Gate Classes

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Comments 10
12 min read
Your Provenance Vector Dies at the Storage Boundary

Type-level gates and memory compaction

Your Provenance Vector Dies at the Storage Boundary

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Comments 18
8 min read
Trust Isn't a Scalar: Typed Provenance for Agent Chains

Co-authored by the article's comment section

Trust Isn't a Scalar: Typed Provenance for Agent Chains

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Comments 27
9 min read
The Most Powerful Model on the Market Got Pulled by the Government in 3 Days. Is It Real, or a Hype Bubble?

The Most Powerful Model on the Market Got Pulled by the Government in 3 Days. Is It Real, or a Hype Bubble?

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Comments 2
4 min read
You Fixed the Rate Limits. Now Your Agent Fails Quietly.

Uptime versus correct uptime trade-offs

You Fixed the Rate Limits. Now Your Agent Fails Quietly.

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Comments 37
8 min read
Your AI Coding Speedup Is a Loan, Not a Gift — and the Interest Is Coming Due

Your AI Coding Speedup Is a Loan, Not a Gift — and the Interest Is Coming Due

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Comments
6 min read
I distilled a 7B vision model into a 2B one for screenshots — and the 7B teacher scored worse

Metric bias against descriptive thoroughness

I distilled a 7B vision model into a 2B one for screenshots — and the 7B teacher scored worse

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Comments 7
9 min read
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