MODELDRIFT.WATCH

Sep 28 · Day 19

MINOR · GPT · QUESTION 24

GPT went back to its earlier list for a request for a ranked top 5 of noise-cancelling headphones.

Why it’s minor

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 24

Best noise-cancelling headphones for long-haul flights — give me a ranked top 5 with brand and model.

SEP 27the changePermalink

Picks read from the answer, in order
  1. Sony WH-1000XM6
  2. Bose QuietComfort Ultra Headphones
  3. Bose QuietComfort Headphones
  4. Sennheiser Momentum 4 Wireless
  5. Sonos Ace

Top 5 noise-cancelling headphones for long-haul flights

  • 1.Sony WH-1000XM6 — Best overall: excellent ANC, comfortable fit, foldable design, and roughly 30-hour battery life.
  • 2.Bose QuietComfort Ultra Headphones — Best noise cancellation and cabin comfort; exceptionally effective against engine rumble.
  • 3.Bose QuietComfort Headphones — Lighter and usually cheaper than the Ultra, with excellent comfort and strong ANC.
  • 4.Sennheiser Momentum 4 Wireless — Best battery life at up to 60 hours; very good sound and solid, though not class-leading, ANC.
  • 5.Sonos Ace — Comfortable, premium-sounding, with effective ANC and around 30 hours of battery life.

Quick recommendation: Pick the Sony WH-1000XM6 for the best all-round travel package, or the Bose QuietComfort Ultra if maximum cabin-noise reduction is your priority.

SEP 28backPermalink

Picks read from the answer, in order
  1. Bose QuietComfort Ultra Headphones
  2. Sony WH-1000XM6
  3. Bose QuietComfort Headphones
  4. Sony WH-1000XM5
  5. Sennheiser Momentum 4 Wireless

Top 5 noise-cancelling headphones for long-haul flights

  • 1.Bose QuietComfort Ultra Headphones — Best overall for exceptional cabin-noise cancellation and all-day comfort.
  • 2.Sony WH-1000XM6 — Outstanding ANC, roughly 30-hour battery life, and a foldable travel-friendly design.
  • 3.Bose QuietComfort Headphones — Extremely comfortable with excellent ANC; a strong value alternative to the Ultra.
  • 4.Sony WH-1000XM5 — Superb noise cancellation and battery life, though the non-folding design is less convenient for travel.
  • 5.Sennheiser Momentum 4 Wireless — Best for battery life at up to 60 hours, with great sound and solid—but not class-leading—ANC.

Best pure flight pick: Bose QuietComfort Ultra
Best battery pick: Sennheiser Momentum 4
Best balance of ANC, features, and portability: Sony WH-1000XM6

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

Deviation the day it changed

2026-09-27 permalink

Scored
answered
Received
2026-09-27 09:16:11 UTC
Run
20260927T090007Z-7adb14
Served by
OpenAI · HTTP 200 · finish stop
Size
859 characters · 727 tokens out incl. hidden reasoning · 12.6 s
Extracted picks, in order · confidence high
  1. Sony WH-1000XM6
  2. Bose QuietComfort Ultra Headphones
  3. Bose QuietComfort Headphones
  4. Sennheiser Momentum 4 Wireless
  5. Sonos Ace

Highlighted: the names the extractor took as picks, where they appear verbatim (5 of 5).

### Top 5 noise-cancelling headphones for long-haul flights
1. **Sony WH-1000XM6** — Best overall: excellent ANC, comfortable fit, foldable design, and roughly 30-hour battery life.
2. **Bose QuietComfort Ultra Headphones** — Best noise cancellation and cabin comfort; exceptionally effective against engine rumble.
3. **Bose QuietComfort Headphones** — Lighter and usually cheaper than the Ultra, with excellent comfort and strong ANC.
4. **Sennheiser Momentum 4 Wireless** — Best battery life at up to 60 hours; very good sound and solid, though not class-leading, ANC.
5. **Sonos Ace** — Comfortable, premium-sounding, with effective ANC and around 30 hours of battery life.
**Quick recommendation:** Pick the **Sony WH-1000XM6** for the best all-round travel package, or the **Bose QuietComfort Ultra** if maximum cabin-noise reduction is your priority.

End of response · 9 lines · 859 characters · sha256 054832405338d5606c3708c821fda05999383246570c7006dba1dab4536e7178

Reverted back to baseline

2026-09-28 permalink

Scored
answered
Received
2026-09-28 09:16:15 UTC
Run
20260928T090007Z-07d4be
Served by
OpenAI · HTTP 200 · finish stop
Size
853 characters · 661 tokens out incl. hidden reasoning · 10.6 s
Extracted picks, in order · confidence high
  1. Bose QuietComfort Ultra Headphones
  2. Sony WH-1000XM6
  3. Bose QuietComfort Headphones
  4. Sony WH-1000XM5
  5. Sennheiser Momentum 4 Wireless

Highlighted: the names the extractor took as picks, where they appear verbatim (5 of 5).

### Top 5 noise-cancelling headphones for long-haul flights
1. **Bose QuietComfort Ultra Headphones** — Best overall for exceptional cabin-noise cancellation and all-day comfort.
2. **Sony WH-1000XM6** — Outstanding ANC, roughly 30-hour battery life, and a foldable travel-friendly design.
3. **Bose QuietComfort Headphones** — Extremely comfortable with excellent ANC; a strong value alternative to the Ultra.
4. **Sony WH-1000XM5** — Superb noise cancellation and battery life, though the non-folding design is less convenient for travel.
5. **Sennheiser Momentum 4 Wireless** — Best for battery life at up to 60 hours, with great sound and solid—but not class-leading—ANC.
**Best pure flight pick:** Bose QuietComfort Ultra
**Best battery pick:** Sennheiser Momentum 4
**Best balance of ANC, features, and portability:** Sony WH-1000XM6

End of response · 11 lines · 853 characters · sha256 c5770dddbb10d8f320f94c6628039c97e272cf8135b6b761059840bd9cce57b9

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 2026-09-28 09:00:07 UTC (matches the pin)
Prompt
Question 24: P3 (recommendation)
Why this question
Asking for a ranked list makes a change in the order easy to see.
Change
first extracted pick differs from the baseline's (full lists below)
Baseline
7 prior days with data; 8 matched the baseline value (2026-09-20, 2026-09-21, 2026-09-22, 2026-09-23, 2026-09-24, 2026-09-25, 2026-09-26, 2026-09-27)
Responses
deviation 2026-09-27 09:16:11 UTC, run 20260927T090007Z-7adb14; reverted 2026-09-28 09:16:15 UTC, run 20260928T090007Z-07d4be
Detected
2026-09-28 · run 20260928T090007Z-07d4be, started 2026-09-28 09:00:07 UTC · scorer v1 · severity rules r2
Permalink
https://modeldrift.watch/e/2026-09-28/P3/openai/gpt-5.6-sol/transient_anomaly/picks.top/
Event ID
2026-09-28:P3:openai/gpt-5.6-sol:transient_anomaly:picks.top

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