Subvolts take Human feedback is essential for AI that works in the real world, not just on paper. Oct 18, 2025
For you
Developers
Learn how to integrate human feedback into your AI development workflow for better real-world performance.
Business
Understand the value of human oversight in AI and how platforms like Prolific can improve AI product quality.
Hype note
3/5Notable

This interview with leaders from a key AI infrastructure provider offers practical insights into AI development challenges.

The Secret Engine of AI - Prolific [Sponsored] (Sara Saab, Enzo Blindow)

1 h 20 Interview Hosts: Tim Scarfe
0:001:19:39

Audio streams from Machine Learning Street Talk (MLST). Your place is remembered on this device.

From Subvolts

Summary and analysis by Subvolts editorial, AI-assisted.

Summary

Machine Learning Street Talk features Sara Saab and Enzo Blindow of Prolific discussing human evaluation in AI. They explain how their platform provides well-treated, verified humans for AI training and testing. The episode highlights the limitations of benchmark scores when AI models feel awkward or problematic in practice, emphasizing the need for human oversight beyond technical metrics.

Explained simply

AI systems need humans to check their work, like a teacher grading homework. Prolific provides these human graders through a service. This helps make AI useful and safe for everyone, not just good at tests.

Why listen

This episode explores the crucial, often overlooked, role of human feedback in refining AI models. It's for anyone interested in how AI actually works beyond benchmarks, particularly product managers, AI developers, and researchers at frontier labs like OpenAI, Google Gemini, Anthropic, and Meta AI. The discussion directly addresses the gap between technical performance and real-world usability, a challenge all major AI labs face as they strive for safer and more effective AI.

On the mic
  • HostTim Scarfe
  • GuestSara SaabVP of Product, Prolific
  • GuestEnzo BlindowVP of Data and AI, Prolific
About
Key facts
  • Show: Machine Learning Street Talk
  • Guests: Sara Saab (VP of Product, Prolific) and Enzo Blindow (VP of Data and AI, Prolific)
  • Length: 80 minutes
  • Prolific's Approach: Put well-treated, verified, diversely demographic humans behind an API.
  • AI Model Mentioned: Grok 4
Show notes from Machine Learning Street Talk (MLST)

We sat down with Sara Saab (VP of Product at Prolific) and Enzo Blindow (VP of Data and AI at Prolific) to explore the critical role of human evaluation in AI development and the challenges of aligning AI systems with human values. Prolific is a human annotation and orchestration platform for AI used by many of the major AI labs. This is a sponsored show in partnership with Prolific.


**SPONSOR MESSAGES**

—

cyber•Fund https://cyber.fund/?utm_source=mlst is a founder-led investment firm accelerating the cybernetic economy

Oct SF conference - https://dagihouse.com/?utm_source=mlst - Joscha Bach keynoting(!) + OAI, Anthropic, NVDA,++

Hiring a SF VC Principal: https://talent.cyber.fund/companies/cyber-fund-2/jobs/57674170-ai-investment-principal#content?utm_source=mlst

Submit investment deck: https://cyber.fund/contact?utm_source=mlst

—


While technologists want to remove humans from the loop for speed and efficiency, these non-deterministic AI systems actually require more human oversight than ever before. Prolific's approach is to put "well-treated, verified, diversely demographic humans behind an API" - making human feedback as accessible as any other infrastructure service.


When AI models like Grok 4 achieve top scores on technical benchmarks but feel awkward or problematic to use in practice, it exposes the limitations of our current evaluation methods. The guests argue that optimizing for benchmarks may actually weaken model performance in other crucial areas, like cultural sensitivity or natural conversation.


We also discuss Anthropic's research showing that frontier AI models, when given goals and access to information, independently arrived at solutions involving blackmail - without any prompting toward unethical behavior. Even more concerning, the more sophisticated the model, the more susceptible it was to this "agentic misalignment."


Enzo and Sarah present Prolific's "Humane" leaderboard as an alternative to existing benchmarking systems. By stratifying evaluations across diverse demographic groups, they reveal that different populations have vastly different experiences with the same AI models.


Looking ahead, the guests imagine a world where humans take on coaching and teaching roles for AI systems - similar to how we might correct a child or review code. This also raises important questions about working conditions and the evolution of labor in an AI-augmented world. Rather than replacing humans entirely, we may be moving toward more sophisticated forms of human-AI collaboration.


As AI tech becomes more powerful and general-purpose, the quality of human evaluation becomes more critical, not less. We need more representative evaluation frameworks that capture the messy reality of human values and cultural diversity.


Visit Prolific:

https://www.prolific.com/

Sara Saab (VP Product):

https://uk.linkedin.com/in/sarasaab


Enzo Blindow (VP Data & AI):

https://uk.linkedin.com/in/enzoblindow


TRANSCRIPT:

https://app.rescript.info/public/share/xZ31-0kJJ_xp4zFSC-bunC8-hJNkHpbm7Lg88RFcuLE


TOC:

[00:00:00] Intro & Background

[00:03:16] Human-in-the-Loop Challenges

[00:17:19] Can AIs Understand?

[00:32:02] Benchmarking & Vibes

[00:51:00] Agentic Misalignment Study

[01:03:00] Data Quality vs Quantity

[01:16:00] Future of AI Oversight


REFS:

Anthropic Agentic Misalignment

https://www.anthropic.com/research/agentic-misalignment


Value Compass

https://arxiv.org/pdf/2409.09586


Reasoning Models Don’t Always Say What They Think (Anthropic)

https://www.anthropic.com/research/reasoning-models-dont-say-think

https://assets.anthropic.com/m/71876fabef0f0ed4/o

Jargon decoded
non-deterministic
Enzo Blindow
AI systems whose output can vary even with the same input, making them harder to predict and control.
benchmarks
Sara Saab
Standardized tests used to measure and compare the performance of AI models.
Published
Show
Machine Learning Street Talk · Machine Learning Street Talk (MLST)
Length
1 h 20
Companies
xAI, OpenAI, Google, Anthropic, Meta
Products
Grok 4
Summary by
Subvolts, using an AI model (how we work). Spotted a mistake? Tell us.

Questions people ask

What is Prolific's role in AI development?
Prolific is a human annotation and orchestration platform used by major AI labs to provide well-treated, verified humans for AI training and evaluation.
Why are human evaluations still important for AI?
Even as technologists aim for speed, non-deterministic AI systems require more human oversight. Optimizing solely for benchmarks can weaken practical performance and user experience.

Page generated Oct 19, 2026. Summaries are Subvolts' own; the audio, artwork and notes belong to Machine Learning Street Talk (MLST).