What do Agent AI Stats (Today) and Tab AI Stats actually measure?

After updating to Cursor 3.13.25 I noticed two new status bar metrics:

  • Agent AI Stats (Today)
  • Tab AI Stats (Today)

I couldn’t find any documentation explaining what they represent.

Here are my observations:

• Agent AI Stats displays values such as:
617/770 (80%)
846/1321 (64%)
772/356 (217%)
772/445 (173%)

• Tab AI Stats displays values such as:
52/339 (15%)

• The tooltip says “lines”.

• The denominator changes dynamically.

• The percentage can exceed 100%.

• Ask / Plan / Build seem to affect the numbers differently.

Questions:

  1. What exactly do “lines” represent?
  2. What do the numerator and denominator mean?
  3. Are these informational metrics or are they related to usage limits?
  4. Is there any documentation describing these statistics?

Thanks!

To 8the fist question ‘Lines’ would be the numeric start of a potential line of code

Example

  1. [{ “button” (start}}
  2. “ so on being”
    Very bad example but hope you get it. It’s referring to line of text in the prompt

Thanks! Do you know what the numerator and denominator represent? Why can the percentage exceed 100% (e.g. 217%)?

Hey, thanks for the detailed notes. I’ll reply point by point:

  1. Lines means lines of code added plus removed in AI suggestions.

  2. Numerator and denominator: the denominator is lines the AI suggested for the current day Today, the numerator is lines you accepted or kept. The percent is the acceptance rate.

  • Tab AI Stats counts autocomplete suggestions from Tab.
  • Agent AI Stats counts diffs from Agent or Composer. The numbers can differ between modes, likely because some edits get applied differently, for example some auto applied changes might not be counted as accepted lines. That’s my guess though since the docs don’t explain the exact mechanics.
  1. These are informational productivity metrics. They are not related to usage limits, quota, or billing. For limits and spend, use the separate Usage Summary. They’re different on purpose so it’s easier not to mix them up.

  2. There isn’t separate documentation for these status bar metrics right now.

Why the percent can be over 100% like 217%: the two counters update from different events and don’t match 1:1, so accepted lines can end up higher than suggested lines. This is a known anomaly and your observation is correct. Similar reports exist for API acceptance rate: https://forum.cursor.com/t/more-accepted-than-suggested-lines/130872

If these elements get in the way, you can usually hide them by right clicking the status bar. That’s standard status bar behavior, not guaranteed for these new items, but it’s worth trying.

Let me know if you still have questions.

Thanks!

That clears up my confusion. I initially thought it might be related to usage limits because the percentage changed so dramatically and even exceeded 100%. Good to know it’s just a productivity metric. I appreciate the explanation and the link!