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R142 · Register shift: casual complaint into formal

blind round 11/11 local models answered

Every answer below carries the name of the model that wrote it. Blind refers to the scoring: the review was done without knowing which model produced which answer — the published result names them.

Show task
Rewrite this casual complaint as a firm but courteous formal complaint e-mail (maximum 120 words), keeping every fact: "hey, so the blender you sent me literally died after two days, sparks and everything. i want my money back or a new one asap." Output only the rewritten e-mail.

The answers

Local models (Brain cluster) — identical prompt, shuffled order (the sequence is not a ranking)
qwen3.5:9b
Subject: Complaint Regarding Defective Blender [Order Number, if known]

Dear Customer Service Team,

I am writing to report that the blender received in my recent order malfunctioned after only two days of use. The unit ceased operation and displayed visible sparking, suggesting a significant defect.

As this appliance is clearly faulty, I request immediate resolution. Please advise on the process for either receiving a full refund or obtaining a prompt replacement unit.

I look forward to your swift action regarding this matter.

Sincerely,

[Your Name]
qwen3:14b
Subject: Urgent Complaint Regarding Defective Blender - Order [Insert Order Number]

Dear Customer Service Team,

I am writing to report a significant defect concerning the blender recently received. After only two days of light use, the unit ceased functioning entirely, accompanied by noticeable sparking.

Given that this malfunction suggests a potential safety hazard and product failure, I require immediate action. Please provide either a full refund for the defective item or dispatch a brand-new replacement unit as quickly as possible.

I look forward to your prompt resolution of this matter.

Sincerely,

[Your Name]
qwen3:8b
Subject: Request for Refund or Replacement of Faulty Blender  

Dear [Customer Support Team],  

I am writing to report that the blender I received has malfunctioned within two days of use, emitting sparks and ceasing to function entirely. This poses a safety concern and renders the product unusable. I kindly request a full refund or replacement at your earliest convenience. Please resolve this matter promptly to avoid further inconvenience.  

Thank you for your attention.  

Sincerely,  
[Your Full Name]  
[Your Contact Information]
deepseek-r1:14b
Subject: Formal Complaint Regarding Defective Blender  

Dear [Customer Service Team],  

I am writing to formally complain about the blender I received from your company, ordered on [order number]. Unfortunately, the product failed within just two days of use and even produced sparks, rendering it completely unusable. Given this issue, I kindly request either a full refund or a replacement unit as soon as possible.  

I appreciate your prompt attention to this matter.  

Sincerely,  
[Your Name]
llama3.1:8b
Subject: Defective Blender Replacement Request

Dear Customer Service Team,

I am writing to report a defective blender that I received from your company, which ceased functioning after just two days of use. Upon attempting to blend a routine mixture, the blender emitted sparks and failed to operate. As this product is still under warranty, I request a prompt replacement or refund of the full purchase price.

Please let me know the next steps in resolving this matter. I appreciate your attention to this issue and look forward to a swift resolution.

Sincerely,
[Your Name]
mistral-small:24b
Subject: Urgent Replacement Request for Defective Blender

Dear [Customer Service Team],

I am writing to inform you that the blender I received recently (Order #XXXX) stopped working after just two days of use, with sparks emitting from it when turned on. This is clearly a defective product and needs immediate attention.
Please arrange either a full refund or an urgent replacement at your earliest convenience.

Thank you for your prompt action on this matter.

Best regards,
[Your Name]
qwen3-coder:30b
Subject: Complaint Regarding Defective Blender - Order [Insert Order Number]

Dear Customer Service Team,

I am writing to report a significant issue with the blender recently received. The unit ceased functioning entirely after only two days of use, accompanied by visible sparking. This indicates a manufacturing defect.

As this product failed so quickly, I request immediate resolution. Please advise on the necessary steps for either a full refund or the prompt dispatch of a replacement unit.

I appreciate your prompt attention to this matter and look forward to your swift response.

Sincerely,

[Your Name]
gemma4:26b
Subject: Formal Complaint Regarding Recent Blender Purchase

Dear Customer Service Team,

I am writing to formally report a significant issue with the blender I recently received. After only two days of use, the appliance ceased functioning entirely. During its final operation, I observed sparks emanating from the unit, which is a serious safety concern.

Given this immediate failure, I request either a full refund or a replacement unit to be sent as soon as possible. I look forward to your prompt response and a swift resolution to this matter.

Sincerely,

[Your Name]
command-r:35b
Subject: Urgent Matter Regarding Faulty Blender

Dear [Recipient], 

I am writing to bring to your attention a serious issue with the blender I recently purchased. Within just two days of receiving it, the appliance malfunctioned, emitting sparks. This is an unacceptable and potentially hazardous situation. 

I kindly request that you provide a prompt resolution by either refunding my purchase or arranging for an immediate replacement. I expect a response detailing the next steps to be taken. 

Thank you for your attention to this matter. 

Regards, 
[Your Name]
deepseek-r1:32b
Subject: Request for Refund or Replacement of Blender  

Dear Customer Service Team,  

I am writing to formally lodge a complaint regarding the blender I recently purchased from your store. Unfortunately, the product stopped functioning properly within 48 hours of receipt and began emitting sparks during use, rendering it unusable.  

Given the circumstances, I kindly request either a full refund or the replacement of this item at the earliest opportunity. I trust that you will address this matter promptly to ensure a satisfactory resolution.  

Thank you for your attention to this issue.  

Best regards,  
[Your Name]
qwq:32b
**Subject:** Formal Complaint Regarding Defective Blender and Request for Resolution  

Dear [Customer Service Team/Support Team],  

I am writing to formally complain about a blender (order# [if applicable]) that malfunctioned completely after only two days of use, accompanied by visible sparks. This product clearly did not meet basic safety and functionality expectations.  

In accordance with your warranty policy, I am requesting either a full refund or a replacement unit at the earliest possible convenience. Please confirm the steps you will take to resolve this matter and provide a timeline for resolution.  

Thank you for addressing this promptly.  

Sincerely,  
[Your Full Name]  
[Contact Information]  

(Word count: 100)
Outside the Brain cluster — same task, same character budget, collected through their own tooling (response times not comparable)
Claude Opus 5frontier reference
Subject: Faulty Blender – Request for Refund or Replacement

Dear Sir or Madam,

I am writing regarding the blender I recently received from you. After only two days of use, the appliance failed completely, emitting sparks in the process. Given the safety risk this presents, I consider the product defective and unfit for use.

I would therefore ask you to either refund the full purchase price or supply a replacement unit, whichever you can arrange most quickly. I would appreciate your confirmation of how you intend to proceed at your earliest convenience.

Thank you for your prompt attention to this matter.

Yours faithfully,
[Your Name]
Claude Sonnet 5frontier reference
Subject: Formal Complaint – Defective Blender: Refund or Replacement Requested

Dear Customer Service Team,

I am writing to formally report an issue with the blender I recently purchased. The unit stopped working after only two days of use, emitting sparks during operation, which poses a serious safety concern and is unacceptable for a newly received product.

Given the severity of this fault, I request that you either issue a full refund or dispatch a replacement unit as soon as possible. As the item is unsafe in its current state, I would appreciate your prompt attention to this matter.

I look forward to your swift response and a satisfactory resolution.

Kind regards,
[Your Name]
Claude Fable 5frontier reference
Subject: Complaint – Defective Blender (Refund or Replacement Requested)

Dear Sir or Madam,

I am writing to report a serious fault with the blender I recently purchased from you. After only two days of use, the appliance stopped working entirely and emitted sparks, which raises significant safety concerns.

Given that the product failed so quickly and in such a hazardous manner, I request either a full refund or a replacement unit at your earliest convenience. Please let me know how you intend to resolve this matter and whether you require the defective item to be returned.

I look forward to your prompt response.

Yours faithfully,
[Your Name]
Claude Haiku 4.5frontier reference
Dear Sir/Madam,

I am writing to lodge a formal complaint regarding the blender I purchased from your company. Unfortunately, the product ceased functioning after only two days of use, exhibiting sparks during operation. This indicates a significant product defect.

I formally request either a full refund or an immediate replacement unit. I trust this matter will be resolved at your earliest convenience.

Thank you for your prompt attention to this matter.

Yours sincerely
Reference
Gold — the correct answerreference
Formeller Ton (Anrede/Gruß), alle Fakten erhalten (Mixer, 2 Tage, Funken, defekt, Erstattung ODER Ersatz, zeitnah), keine neuen Fakten, ≤120 Wörter.
Results at a glance— every model in this round with score, response time and status.

Who wrote what

ModelBlind scoreLatencyStatus
qwen3.5:9b 10.06.4 sOK
qwen3:14b 7.06.2 sOK
qwen3:8b 10.09.3 sOK
deepseek-r1:14b 10.023.1 sOK
llama3.1:8b 4.044.3 sOK
mistral-small:24b 10.054.2 sOK
qwen3-coder:30b 10.05.5 sOK
gemma4:26b 10.0121.8 sOK
command-r:35b 10.071.3 sOK
deepseek-r1:32b 10.042.4 sOK
qwq:32b 7.069.7 sOK
Verdict

8 of 11 answering local models matched the gold answer (blind score ≥ 8): gemma4:26b, mistral-small:24b, qwen3-coder:30b, qwen3.5:9b, qwen3:8b, deepseek-r1:14b, deepseek-r1:32b, command-r:35b.