Why this result mattered
Functional tie
The principal comparison placed Qwen 3.8 and Claude under concealed A/B labels.
Both answers place Malik on the same material path: accept the plea if avoiding the 55% risk of 76–100 additional months controls, while recognizing that trial preserves the stated chances of avoiding robbery and the three-year license suspension. Both provide the correct ranges, probabilities, expected-custody calculations, collateral consequences, deadline, and personal-choice requirement.
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Prompt and sealed key
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Read the original matter prompt
Question 21: The Plea Offer Before Dawn
Your role
You represent Malik Dorsey in the fictional State of Harrow. He is charged with armed pharmacy robbery and possession of a firearm during the robbery. A plea offer expires at 4:00 p.m. today. Counsel has supplied the complete probability and sentencing record below. Advise Malik without inventing different odds or assuming where a judge will sentence within a stated range.
Governing law
Assume the following Harrow rules apply:
Counsel must communicate every formal plea offer and advise the defendant of the material sentencing, trial, and collateral consequences. The final choice belongs to the defendant.
A guilty plea must be knowing and voluntary. The court may reject a sentencing recommendation but must sentence within the applicable range stated below.
Under the offer, Malik pleads guilty to robbery. The firearm count is dismissed. The applicable custody range is 30 to 42 months, and the court must credit Malik's eight months of presentence custody.
If Malik is convicted at trial of both charged counts, the applicable aggregate custody range is 84 to 108 months. If he is convicted only of the lesser theft offense, the range is 12 to 18 months. An acquittal produces no sentence.
The eight months of presentence custody is credited against any custodial sentence after trial. No credit is applied to an acquittal because no sentence exists.
A robbery plea or robbery conviction suspends Malik's security-officer license for three years after release. A lesser-theft conviction suspends it for six months. An acquittal produces no suspension.
Trial counsel's good-faith assessment, fixed for this assignment, is: 25 percent probability of acquittal, 20 percent probability of conviction only for lesser theft, and 55 percent probability of conviction on robbery and the firearm count.
The supplied probabilities already account for the eyewitness identification, partial surveillance video, recovered clothing, absence of Malik's DNA on the weapon, and the cooperating driver's credibility problems. Do not add or subtract probability for those facts.
When a sentencing range has no supplied distribution, expected custody must be stated as a range by applying the probability to the low and high endpoints. Do not use the midpoint as though it were a predicted sentence.
Expected-value analysis informs advice but does not compel a risk-neutral defendant. Counsel must explain the probability of each materially different outcome and the collateral consequence.
Facts
A pharmacy was robbed by two masked people. The getaway driver, already charged, says Malik entered the pharmacy with a gun. The driver has received no written cooperation agreement but hopes for leniency. One employee identified Malik's build and voice. Surveillance shows clothing similar to clothing recovered from Malik's apartment. Malik's DNA was not found on the recovered gun. Malik denies entering the pharmacy and says he lent the clothing to the driver.
The prosecutor offers to dismiss the firearm count if Malik pleads to robbery by 4:00 p.m. The prosecutor will recommend 30 months, but the judge may impose any sentence from 30 to 42 months. Malik has already spent eight months in custody.
If Malik goes to trial, counsel supplies the fixed probabilities in rule 7. There is no additional charge, mandatory fine, immigration consequence, or fee shifting. Malik's security-officer license is his principal livelihood. He says:
“I will not plead if trial is basically a coin flip, but I cannot do nine years. Tell me the real numbers, not what you think sounds safe.”
No probability is supplied for a sentence at any particular point within a range. Malik is competent, understands the charges, and has not authorized counsel to accept the offer.
Assignment
Counsel Malik on:
- The plea custody range before and after the eight-month credit.
- The probability of each trial outcome.
- The expected trial custody range using only supplied endpoints and probabilities.
- The expected trial custody range after properly accounting for presentence credit.
- The license consequence in each branch.
- The probability of no robbery conviction and the probability of no incarceration beyond time already served.
- The risk difference between plea and trial without converting the analysis into a guarantee.
- The concrete recommendation before 4:00 p.m. and the decision Malik must personally make.
Read the sealed key
Q21 key (Plea Offer Before Dawn)
- The plea range is 30 to 42 months gross and 22 to 34 months after the fixed eight-month credit. The prosecutor's 30-month recommendation is not a guaranteed sentence. Missed: Malik decides as though 22 months net is assured.
- Trial branches are fixed at 25 percent acquittal, 20 percent lesser theft, and 55 percent robbery plus firearm. Counsel must not revise those odds from the evidence narrative. Missed: the decision is driven by invented confidence.
- Gross expected trial custody range is 20 percent of 12 to 18 plus 55 percent of 84 to 108, with the acquittal branch at zero: 48.6 to 63 months. Missed: a midpoint or unweighted range hides trial exposure.
- Presentence credit applies only in the 75 percent conviction branches. Expected credit is 75 percent of eight months, or six months, producing a net expected trial custody range of 42.6 to 57 months. Missed: eight months is subtracted from every branch, including acquittal, or not subtracted at all.
- Trial offers a 25 percent chance of acquittal and a 45 percent chance of avoiding a robbery conviction, but only a 25 percent chance of no conviction and no sentence. The lesser-theft branch still carries 4 to 10 months beyond time served after credit. Missed: “no robbery” is confused with “no more custody.”
- License consequence is three years after release for plea or robbery conviction, six months for lesser theft, and none for acquittal. Missed: livelihood risk is omitted from the branch comparison.
- The plea dominates on expected custody and eliminates the 84-to-108-month branch. Recommend accepting unless Malik knowingly places exceptional value on the 25 percent acquittal chance and accepts the quantified tail; document that the final decision is his before 4:00 p.m. Missed: counsel either coerces the plea or fails to advise against a much higher supplied risk.
Direct judge report
The report below is preserved from the Qwen 3.8 versus Claude verdict record.
Read the preserved judge report
Basis. Both answers place Malik on the same material path: accept the plea if avoiding the 55% risk of 76–100 additional months controls, while recognizing that trial preserves the stated chances of avoiding robbery and the three-year license suspension. Both provide the correct ranges, probabilities, expected-custody calculations, collateral consequences, deadline, and personal-choice requirement.
A rejected: Malik must admit the robbery “in his own words,” and a plea is unavailable if he cannot truthfully do so — record lacks any rule requiring an in-court admission or foreclosing an innocence-maintaining plea.
Failed candidate: A’s unsupported plea-admission requirement — no safe neutralization failed because ordinary verification against the complete supplied rules rejects it before action.
Failed candidate: A’s firmer recommendation — different conduct failed because both recommend accepting based on Malik’s stated inability to tolerate the long-sentence risk.
Failed candidate: A does not separately label the plea probabilities of no robbery conviction and no additional incarceration as 0% — different conduct failed because its stated plea consequences necessarily establish both.
Failed candidate: B describes rejection as knowing and voluntary — concrete consequence failed because it changes no advice, authorization, or outcome.
Hard stop. The sentence cannot be completed with a concrete, record-supported consequence.
All six pairings
Every pair of the four model answers was judged independently under the same evaluation instrument.
Open the six head-to-head results
| Pairing | Result | Why it mattered | Record |
|---|---|---|---|
| Qwen 3.8 27B vs Claude Opus 5 | Functional tie | Both answers place Malik on the same material path: accept the plea if avoiding the 55% risk of 76–100 additional months controls, while recognizing that trial preserves the stated chances of avoiding robbery and the three-year license suspension. | Judge record |
| Qwen 3.8 27B vs DeepSeek V4-Flash-0731 | Functional tie | Both answers place Malik on the same materially correct path: they accurately present the plea and trial branches, calculate the expected custody ranges, explain the license consequences, recommend accepting the plea before 4:00 p.m. given his stated concern, and preserve his personal choice. | Judge record |
| Qwen 3.8 27B vs Qwen 3.5 27B | Functional tie | Both answers provide the same custody ranges, probabilities, license consequences, expected-value calculations, risk comparison, recommendation to accept the plea given Malik’s stated limit, and instruction that Malik must personally decide before 4:00 p.m. | Judge record |
| DeepSeek V4-Flash-0731 vs Claude Opus 5 | Functional tie | Both answers put Malik on the same materially correct path: understand the specified plea and trial outcomes, receive a recommendation to accept the plea, and personally decide before 4:00 p.m. | Judge record |
| DeepSeek V4-Flash-0731 vs Qwen 3.5 27B | Functional tie | Both answers lead Malik to the same materially correct path: understand the plea and trial ranges, probabilities, custody credits, license consequences, accept the plea recommendation, and personally authorize acceptance before 4:00 p.m. | Judge record |
| Qwen 3.5 27B vs Claude Opus 5 | Functional tie | Both answers lead Malik to the same materially correct and safe path: they accurately state the plea and trial ranges, probabilities, credits, license consequences, and expected-custody ranges, then recommend accepting the plea while preserving Malik’s personal choice before 4:00 p.m. | Judge record |
Rejected-point diagnostic
Judge-attributed rejected points for this matter across all six pairings:
| Qwen 3.8 27B | 1 |
|---|---|
| DeepSeek V4-Flash-0731 | 0 |
| Claude Opus 5 | 5 |
| Qwen 3.5 27B | 4 |
This is a review-burden diagnostic, not a universal hallucination measure.