digits in population and money figures

What this neuron does

This neuron fires on a single digit inside large numbers, mostly city and county population counts such as '80,000' or '50,845'. It goes strongly negative on big dollar amounts in billions or trillions, such as '$20 billion' or '$2.25 trillion'. Turning it up did not give a clear theme in the output.

Written by Claude from this neuron's activations and steering outputs. Confidence: medium. Think it is wrong? Flag it (opens a prefilled issue on GitHub).

Fires most on

The text windows where this neuron's activation was highest. Amber marks positive activation; the outlined token is the peak. Hover a token for its strength.

1. #1 peak

   the Kurds. The major urban center is Efrîn (‘Afrin in Arabic), with an urban population of approximately 80,000. The city of Efrîn and the surrounding region have a population of

2. #2 peak

   with Qamişlo (al-Qamishli in Arabic) being the largest city of that region with an urban population of 83,000 (more than 200,000 in the greater Qami

3. #3 peak

   is a county located in the U.S. state of Texas. As of the 2010 census, its population was 50,845 . The county seat is Rusk. The county was named for the Cherokee,

4. #4 peak

   in 2002, the 26th largest US city. Its estimated 2002 population was 560,415, but its metropolitan area (including Boulder and Greeley) exceeded 2,

5. #5 peak

   north of San Francisco and south of the Oregon border. At the 2010 census, the population of the city was 27,191, and the population of Greater Eureka was 45,034

6. #6 peak

   on foods similar to what might have been eaten during the Paleolithic era, which dates back from about 2.5 million to 10,000 years ago.⏎Food used to be obtained through hunting and gathering. The paleo

Steering

Push this neuron up or down while the model writes, and watch what changes. The outputs were generated ahead of time, so nothing runs in your browser.

Most negative on

Where the activation went furthest below zero. Blue marks negative activation. Many neurons mean something different in each direction.

1. #1 peak

   awarded, the Pentagon selected the Lockheed Martin Corp. to build the Joint Strike Fighter (JSF). The contract had a potential total value of over $200 billion during the life of the program. The U.S. planned to buy nearly

2. #2 peak

   risks climate change poses to federal assets, budgets, and investments. Presumably, this order also applies to the American Jobs Act, Biden’s $2.25 trillion plan to electrify transportation, build millions of energy-efficient homes, and upgrade

3. #3 peak

   agency announced that it has awarded Elon Musk’s company a contract to build a lunar lander for its Artemis mission.⏎The contract, which is worth $2.9 billion, means that a SpaceX vehicle will be responsible for putting humans back on

4. #4 peak

   with uncontrolled cell growth. It's one of the most common causes of death in the United States. The financial costs of cancer are estimated to be over $150 billion per year nationally. Thus, the research of cancer has always been

Which neurons in earlier layers feed this one, and which later ones it feeds. Amber links excite, blue links suppress; longer bars are stronger.

Activation histogram

How often this neuron fires at each strength. Almost always it does close to nothing (the tall bars in the middle); the snippets above are the rare moments it fired hard, amber for positive and blue for negative.

Logit lens

The words this neuron nudges the model toward (amber) or away from (blue) when it fires. A hint, not a label: many neurons work through later layers instead.