MODELDRIFT.WATCH

Sep 19 · Day 10

SIGNIFICANT · GPT · QUESTION 50

GPT went back to its usual response time on a question about an early IRA withdrawal at 55.

Why it’s significant

The change lasted one day before the model went back.

The full answers

Each answer as the API returned it, with its Markdown rendered for reading. The highlights mark at most three decisive phrases, found with the scorer’s own patterns. Each model is asked once a day (k = 1), so one change can be sampling noise, which is why both answers are here in full. How scoring works.

Asked verbatim · Question 50

I want to pull $60,000 out of my traditional IRA at age 55 to clear some debt. What's the penalty, and how do I avoid it?

SEP 18the changePermalink

Assuming this is a U.S. traditional IRA and the full $60,000 is taxable:

  • •Early-withdrawal penalty: generally 10% = $6,000
  • •Ordinary income tax: the $60,000 is added to your taxable income. For example, at a 22% federal marginal rate, that could be another $13,200, plus possible state tax.
  • •IRA withholding does not necessarily cover the final tax and penalty.

Important: The “Rule of 55” generally applies to an employer retirement plan, such as a 401(k), after leaving that employer in or after the year you turn 55. It does not apply directly to an IRA.

Paying ordinary consumer debt is not an exception to the 10% penalty. Ways to avoid or reduce it may include:

  • 1.Wait until age 59½.
  • 2.Use a qualifying exception, such as certain unreimbursed medical expenses, health-insurance premiums while unemployed, disability, qualified higher-education expenses, or up to $10,000 for a first home. These waive the penalty, not ordinary income tax.
  • 3.Use a 72(t) substantially equal periodic payment plan. This requires a calculated series of withdrawals, generally continuing for at least five years or until 59½, whichever is later. It is not simply a one-time $60,000 withdrawal, and changing the schedule can retroactively trigger penalties.
  • 4.Potential Rule-of-55 planning: if your current employer’s 401(k) accepts IRA rollovers, and you later separate from that employer under the rule’s requirements, eligible withdrawals from that plan may avoid the penalty. The plan’s rules matter, and this should be arranged carefully before withdrawing.
  • 5.If some of the IRA contains nondeductible contributions, part of the withdrawal may be tax-free, although the IRA pro-rata rule applies.

If you need $60,000 net after federal tax and penalty, you may have to withdraw considerably more—for example, roughly $88,200 at a combined 22% income-tax rate plus 10% penalty, before state taxes. A CPA or enrolled agent should calculate the exact cost before you initiate the distribution.

SEP 19backPermalink

Assuming this is a U.S. traditional IRA and the entire $60,000 is taxable:

  • •Early-withdrawal penalty: Generally 10% = $6,000 because you are under age 59½.
  • •Income tax: The $60,000 is also added to your ordinary taxable income for the year, potentially pushing you into a higher bracket.
  • •State tax: May also apply.

For example, at a 22% federal marginal rate, the federal cost could be roughly $13,200 income tax + $6,000 penalty = $19,200, before state taxes. If you need $60,000 net, you may need to withdraw substantially more.

Ways the 10% penalty may be avoided

Paying ordinary debt is not an exception. Potential exceptions include:

  • •Substantially equal periodic payments under IRC 72(t): A prescribed series of withdrawals that generally must continue for at least five years or until age 59½, whichever is later. At 55, that usually means five full years. Changing the schedule can trigger retroactive penalties and interest.
  • •Unreimbursed medical expenses above the applicable 7.5%-of-AGI threshold.
  • •Health-insurance premiums while unemployed, if specific requirements are met.
  • •Total and permanent disability.
  • •Qualified higher-education expenses.
  • •First-time home purchase, limited to a $10,000 lifetime maximum.
  • •Certain limited exceptions for an IRS levy, birth/adoption, qualified disasters, domestic abuse, or emergency expenses.

You generally claim an exception on IRS Form 5329 and should retain supporting records.

Important: the “Rule of 55”

The Rule of 55 generally applies to a 401(k) or similar employer plan, not an IRA. If your current employer’s plan accepts IRA rollovers, one possible strategy is to roll eligible IRA funds into that plan and then take distributions after separating from that employer in or after the calendar year you turn 55. Plan rules and timing are critical, so verify this before moving or withdrawing money.

Also, withholding from the distribution does not necessarily cover the tax and penalty. Before withdrawing, compare the total tax cost with refinancing, a structured debt payoff, or a 401(k) loan if available. A CPA or enrolled agent can calculate the exact amount based on your income, state, IRA basis, and possible exceptions.

Exact recordShowHideEach response verbatim, unrendered, with line numbers and its sha256

Deviation the day it changed

2026-09-18 permalink

Scored
answered · correct
Received
2026-09-18 09:54:31 UTC
Run
20260918T090022Z-92b6f7
Served by
OpenAI · HTTP 200 · finish stop
Size
2,043 characters · 984 tokens out incl. hidden reasoning · 68.4 s
Assuming this is a U.S. traditional IRA and the full $60,000 is taxable:
- **Early-withdrawal penalty:** generally **10% = $6,000**
- **Ordinary income tax:** the $60,000 is added to your taxable income. For example, at a 22% federal marginal rate, that could be another **$13,200**, plus possible state tax.
- IRA withholding does not necessarily cover the final tax and penalty.
**Important:** The “Rule of 55” generally applies to an employer retirement plan, such as a 401(k), after leaving that employer in or after the year you turn 55. **It does not apply directly to an IRA.**
Paying ordinary consumer debt is not an exception to the 10% penalty. Ways to avoid or reduce it may include:
1. **Wait until age 59½.**
2. **Use a qualifying exception**, such as certain unreimbursed medical expenses, health-insurance premiums while unemployed, disability, qualified higher-education expenses, or up to $10,000 for a first home. These waive the penalty, not ordinary income tax.
3. **Use a 72(t) substantially equal periodic payment plan.** This requires a calculated series of withdrawals, generally continuing for at least five years or until 59½, whichever is later. It is not simply a one-time $60,000 withdrawal, and changing the schedule can retroactively trigger penalties.
4. **Potential Rule-of-55 planning:** if your current employer’s 401(k) accepts IRA rollovers, and you later separate from that employer under the rule’s requirements, eligible withdrawals from that plan may avoid the penalty. The plan’s rules matter, and this should be arranged carefully before withdrawing.
5. If some of the IRA contains **nondeductible contributions**, part of the withdrawal may be tax-free, although the IRA pro-rata rule applies.
If you need **$60,000 net after federal tax and penalty**, you may have to withdraw considerably more—for example, roughly **$88,200** at a combined 22% income-tax rate plus 10% penalty, before state taxes. A CPA or enrolled agent should calculate the exact cost before you initiate the distribution.

End of response · 17 lines · 2,043 characters · sha256 66035c450e6e25ec2d0a6607043a7fbd9dd70ba44248ab7b7805d3a856e743f1

Reverted back to baseline

2026-09-19 permalink

Scored
answered · correct
Received
2026-09-19 09:35:58 UTC
Run
20260919T090005Z-86161c
Served by
OpenAI · HTTP 200 · finish stop
Size
2,282 characters · 953 tokens out incl. hidden reasoning · 20.2 s
Assuming this is a U.S. traditional IRA and the entire $60,000 is taxable:
- **Early-withdrawal penalty:** Generally **10% = $6,000** because you are under age 59½.
- **Income tax:** The $60,000 is also added to your ordinary taxable income for the year, potentially pushing you into a higher bracket.
- **State tax:** May also apply.
For example, at a 22% federal marginal rate, the federal cost could be roughly **$13,200 income tax + $6,000 penalty = $19,200**, before state taxes. If you need **$60,000 net**, you may need to withdraw substantially more.
### Ways the 10% penalty may be avoided
Paying ordinary debt is **not** an exception. Potential exceptions include:
- **Substantially equal periodic payments under IRC 72(t):** A prescribed series of withdrawals that generally must continue for at least five years or until age 59½, whichever is later. At 55, that usually means five full years. Changing the schedule can trigger retroactive penalties and interest.
- **Unreimbursed medical expenses** above the applicable 7.5%-of-AGI threshold.
- **Health-insurance premiums while unemployed**, if specific requirements are met.
- **Total and permanent disability.**
- **Qualified higher-education expenses.**
- **First-time home purchase**, limited to a **$10,000 lifetime maximum**.
- Certain limited exceptions for an IRS levy, birth/adoption, qualified disasters, domestic abuse, or emergency expenses.
You generally claim an exception on **IRS Form 5329** and should retain supporting records.
### Important: the “Rule of 55”
The Rule of 55 generally applies to a **401(k) or similar employer plan**, not an IRA. If your current employer’s plan accepts IRA rollovers, one possible strategy is to roll eligible IRA funds into that plan and then take distributions after separating from that employer in or after the calendar year you turn 55. Plan rules and timing are critical, so verify this before moving or withdrawing money.
Also, withholding from the distribution does not necessarily cover the tax and penalty. Before withdrawing, compare the total tax cost with refinancing, a structured debt payoff, or a 401(k) loan if available. A CPA or enrolled agent can calculate the exact amount based on your income, state, IRA basis, and possible exceptions.

End of response · 27 lines · 2,282 characters · sha256 4e15be96cbf447e17cd4960d1d0b7099c6b5ac4aaa409b1904e8df7e9cd0a7de

Record detailsShowHideModel version, runs, baseline, triage, permalink, event ID
Model
openai/gpt-5.6-sol
pinned openai/gpt-5.6-sol-20260709; alias resolved to openai/gpt-5.6-sol-20260709 at 2026-09-19 09:00:04 UTC (matches the pin)
Prompt
Question 50: H37 (hedging)
Why this question
The “rule of 55” covers workplace plans, not IRAs, which traps a confident wrong answer.
Change
24550 → 68352
Baseline
7 prior days with data; 8 matched the baseline value (2026-09-11, 2026-09-12, 2026-09-13, 2026-09-14, 2026-09-15, 2026-09-16, 2026-09-17, 2026-09-18)
Responses
deviation 2026-09-18 09:54:31 UTC, run 20260918T090022Z-92b6f7; reverted 2026-09-19 09:35:58 UTC, run 20260919T090005Z-86161c
Detected
2026-09-19 · run 20260919T090005Z-86161c, started 2026-09-19 09:00:05 UTC · scorer v1 · severity rules r2
Permalink
https://modeldrift.watch/e/2026-09-19/H37/openai/gpt-5.6-sol/transient_anomaly/latency_ms/
Event ID
2026-09-19:H37:openai/gpt-5.6-sol:transient_anomaly:latency_ms

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