Model drift

The calculator uses the numbers you enter. With 0.82 base, 0.74 current the result is Relative metric drift: 9.8%. This is not production monitoring.

This is not production monitoring. API exposure is on API exposure.

Input data

Results

Enter data and click Calculate.

How it works

Model drift in this calculator is the relative metric change in percent. With 0.82 base, 0.74 current the result is Relative metric drift: 9.8%.

drift = |current − base| / max(0.0001, |base|) × 100. The formula uses metric and baseline.

Relative metric drift: 9.8% is not production monitoring. Another set of numbers gives Relative metric drift: 2.2%, and a further set gives Relative metric drift: 25.7%. Empty optional fields do not change the result.

API exposure answers a different question. Fairness gap does too. Here 0.82 base, 0.74 current leave Relative metric drift: 9.8%.

Type 0.82 base, 0.74 current and click Calculate. Two more ready sets sit under the form: Relative metric drift: 2.2% and Relative metric drift: 25.7%.

Other numbers on the same labels move the result. The first example gives Relative metric drift: 9.8%.

Formula

drift = |current − base| / max(0.0001, |base|) × 100.

How to use

  1. Type 0.82 base, 0.74 current.
  2. Leave optional fields empty if you do not want them in the result.
  3. Click Calculate. This set shows Relative metric drift: 9.8%.
  4. The second example under the result is Relative metric drift: 2.2%, the third Relative metric drift: 25.7%.
  5. This is not production monitoring.

Model drift = Relative metric drift: 9.8%

With 0.82 base, 0.74 current the result is Relative metric drift: 9.8%. This is not production monitoring.

Model drift
Model drift is this calculator's result. The first example is Relative metric drift: 9.8%.
metric
The formula includes metric. The second example gives Relative metric drift: 2.2%.
baseline
The formula includes baseline. The second example gives Relative metric drift: 2.2%.

Examples

Example 1

  • 0.82 base
  • 0.74 current

Relative metric drift: 9.8%

With 0.82 base, 0.74 current the result is Relative metric drift: 9.8%. This is not production monitoring.

Example 2

  • 0.9 base
  • 0.88 current

Relative metric drift: 2.2%

With 0.9 base, 0.88 current the result is Relative metric drift: 2.2%.

Example 3

  • 0.7 base
  • 0.52 current

Relative metric drift: 25.7%

With 0.7 base, 0.52 current the result is Relative metric drift: 25.7%.

Related calculators

API exposure

API exposure: score = mean(map15) × 100.

Use calculator →

Fairness gap

Fairness gap: gap = |group A − group B|.

Use calculator →

All AI regulation calculators

Common questions

What do you get from 0.82 base, 0.74 current?

Relative metric drift: 9.8%. This is not production monitoring.

What about the second example?

Relative metric drift: 2.2%.

What about the third example?

Relative metric drift: 25.7%.

Is Relative metric drift: 9.8% production monitoring?

No. It is the result from the numbers you enter.

Do empty fields change Relative metric drift: 9.8%?

No. Empty optional fields do not change the result.

How is this different from API exposure?

That calculator answers another question. Here Model drift stays at Relative metric drift: 9.8%.

Does a comma in the number work?

Yes. A comma and a dot mean the same in a number field.

Is the result a diagnosis or official opinion?

No. The result comes from the numbers you enter. production monitoring sits outside this calculator.

Do 0.9 base, 0.88 current give Relative metric drift: 2.2%?

Yes. That is the second example under the form.

How is drift calculated?

The calculator takes the absolute difference of the current metric and the baseline, divides by the absolute baseline (not smaller than 0.0001), and multiplies by 100. In the first example the result is Relative metric drift: 9.8%.

Do a drop and a rise give the same drift?

Yes, when the distance from the baseline is the same. The absolute value does not keep the direction.

Is this production monitoring?

No. The calculator computes the relative change of two numbers you enter. It does not read production metrics and does not raise an alert.

What if the baseline is 0?

The divisor does not go below 0.0001. With a baseline of 0 the formula still divides by 0.0001, so the result is not an ordinary percent change.

Knowledge sources

The terms come from EU acts. The calculator result is a sketch index, not a regulator decision.

Page updated in 2026.