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jessy

@goodhartproof · sf · joined 16 Feb 2021

learning | writing | interested in verification, ai safety

11 771Followers
1 916Following
2 265Posts total
2.7MViews on collected posts

Latest posts

@goodhartproof Feels like the model is becoming the commodity and the harness is the product. The real moat is probably the messy domain context, integrations, and distribution around it. Did the strongest teams have a wedge beyond the workflow itself? 17.9K views · 66 likes · 1 reposts · 7 replies Open on X →
in the age where capabilities are quickly subsumed by frontier models, one of the most durable problems to be working on today is AI safety you simply cannot trust and let a stochastic model (even though well post-trained) to check and balance an adversarial model and 1.9K views · 8 likes · 1 reposts · 0 replies Open on X →
@goodhartproof This is 100% what people are doing right now even around us in Paris. Harness, tools, and agent stacks for specific usage. 14.6K views · 45 likes · 0 reposts · 3 replies Open on X →
@goodhartproof Makes a lot of sense, seems like the frontier models just get good at everything and the three most obvious non-hardware things to do given that fact are 1. Harnesses to plug models into domains (most advanced examples are probably GTM automation companies, becaus 29.2K views · 178 likes · 6 reposts · 4 replies Open on X →
I was just at YC demo day yesterday. Besides hardware/physical things, everyone is just basically just building a domain-specific harness https://t.co/X28X90mLjV
847.6K views · 2.1K likes · 60 reposts · 125 replies Open on X →
Most people think verifying math is hard, but no, verifying code is much harder 1.7K views · 12 likes · 1 reposts · 1 replies Open on X →
Recently I left quant to work on AI safety. The Huggingface Incident made me extremely concerned that we are not set up to handle the risks. I wrote my this post for people in a similar position to me - why you *can* have impact and how to get started - https://t.co/bmmCUk5fkK 44K views · 657 likes · 37 reposts · 21 replies Open on X →
i found a playbook for anthropic to be a $10T company first, jeff dean should immediately double his round at $20B today, then get acquired by Anthropic for >1% of its stock when it IPOs at $2T simple math 1. "@AnthropicAI buys @JeffDean" makes the stock pump >1% so the 1.6K views · 10 likes · 0 reposts · 2 replies Open on X →
@13yearoldvc https://t.co/bZiIdxeoql
925 views · 7 likes · 0 reposts · 0 replies Open on X →
@13yearoldvc 不是天时地利人和嘛? 65.5K views · 7 likes · 0 reposts · 1 replies Open on X →
@13yearoldvc nice variation/expansion on Buffet's famous "slot ticket" https://t.co/Z2gGIW2MIF
29K views · 37 likes · 0 reposts · 0 replies Open on X →
https://t.co/nAZXzPj2Gw 1.6M views · 2.7K likes · 367 reposts · 51 replies Open on X →

Against accounts of the same size

8 posts from the last 90 days, next to the 10K–100K follower range. shown widely, but few of those viewers react.

Median views16 217this account1 056median for 10K–100K
Reach, %137.77%this account3.62%median for 10K–100K
Engagement, %0.56%this account1.71%median for 10K–100K
MetricThis accountMedian for 10K–100KRatio
Median views per post16 2171 05615.4×
Reach (views ÷ followers)137.77%3.62%38.1×
Engagement rate0.56%1.71%0.33×

Others in this range →   Compare with another account →   How these benchmarks are built →

Growth & engagement

How the posts we collected actually performed: views and reaction rate post by post, what the audience did with them, and where the follower count goes.

Views per post

1.6M29 Jul
29K24 Sep
65.5K5 Oct
92525 Jan
1.6K20 Aug
44K9 Sep
1.7K11 Sep
847.6K
29.2K
14.6K
1.9K12 Sep
17.9K

Last 12 collected posts, oldest on the left. The scale is logarithmic: one post can outrun the rest a hundred times over.

Engagement rate per post

0.19%29 Jul
0.13%24 Sep
0.01%5 Oct
0.76%25 Jan
0.75%20 Aug
1.62%9 Sep
0.83%11 Sep
0.27%
0.64%
0.33%
0.48%12 Sep
0.41%

Reactions — likes, reposts, replies and quotes — divided by views. Median for 10K–100K accounts is 1.71%.

What the audience does

Likes39.2%5 855 in total
Reposts3.2%473 in total
Replies1.4%215 in total
Bookmarks56.2%8 394 in total

Share of every reaction we collected for this account. Replies mean argument, reposts mean endorsement, bookmarks mean the post was worth keeping.

Followers by day

13 Sep

Daily snapshots since 13 Sep 2026; the dashed line is the starting count.

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