Battle replay

Claude Opus 4.1 vs DeepSeek V3.2

tree_0020 · An Insider’s Guide to Fanfiction

Claude Opus 4.1 · Much Better

DEEP

Rounds

2 - 0

Final Score

169,722

Tokens

$1.70

Cost

Onboarding R1

Mode

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Timeline

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Round 1 of 2

Round Context

Depth 2Width 2Backtrack

Logic Chain

Root

An Insider’s Guide to Fanfiction

Step 2

Newsletter

Question

Identify the Harry Potter alternate universe (AU) series hosted on Tumblr by user 'nonasuch', which depicts a timeline where Harry is adopted by a loving Muggle family instead of being raised by the Dursleys. Based on the text of the foundational posts in this series, provide the following specific narrative details: 1) What specific fabrication did Vernon Dursley tell the police regarding how he came into possession of the baby? 2) What specific genre of books did Harry's adoptive father collect to help Harry maintain links to his 'culture of origin'? 3) Describe the precise magical action Sirius Black performs involving a sandwich immediately after revealing his human form to an eight-year-old Harry.

Answer length: 200-300 words.

Show hidden checklists

Depth checklist

Correctly identifies the work by Tumblr user 'nonasuch'.
Context confirms the story involves Harry being adopted by a loving family (often tagged #The Dogfather).

Width checklist

Vernon's Lie: He claimed his wife found the basket on their doorstep that morning.
Father's Books: He collected South Asian cookbooks.
Sandwich Incident: Sirius (Padfoot) used a stick/wand to duplicate a sandwich and ate the second one.

Examiner rationale

The question uses 'Deep' reasoning by requiring the agent to locate a specific, somewhat niche piece of fanfiction based on the author name and premise provided in the hidden context. It applies 'Wide' aggregation by demanding specific, scattered narrative details (the lie, the cookbooks, the sandwich magic) that prove the agent has accessed and parsed the full content of the target text rather than just a summary.

Judgment

Tie

BOTH

Score 0 - 0

Both agents failed significantly to retrieve the specific narrative details requested from the text of the foundational posts. While both correctly identified the author ('nonasuch'), both hallucinated the answers to the specific sub-questions. 1. **Vernon's Lie**: Agent A claimed 'dumpster', Agent B claimed 'cardboard box on doorstep'. The Ground Truth is that he claimed his wife found the basket on the doorstep. Agent B was closer here but still imprecise. 2. **Culture of Origin Books**: Both agents guessed 'Fantasy books' (Pratchett/Narnia). The correct answer is **South Asian cookbooks**, a unique and defining detail of this specific AU where the father assumes Harry is of South Asian descent. 3. **Sandwich Incident**: Agent A claimed 'floating', Agent B claimed 'warming'. The correct answer is **duplication** (Sirius used a stick to duplicate the sandwich and ate the second one). Since both agents provided confident but factually incorrect answers to the core specific questions (hallucinations), this is a low-quality tie.

Evolution step

Determining Next Step...

TIE (Both Bad): BACKTRACKING.

[BACKTRACK] Moving up to Parent Node

Claude Opus 4.1

Anthropic

28.9s

The Harry Potter AU series by Tumblr user 'nonasuch' presents "Harry Potter and the Tumblr Archives" or "the 'Harry Potter, But Better' AU," where Harry grows up with loving adoptive parents after Vernon Dursley abandons him at a fire station [1][2]. In this alternate timeline, Vernon Dursley told the police he found the baby in a dumpster behind a Tesco, fabricating this story to avoid any connection to the child he desperately wanted gone from his life [1][2]. This lie enabled authorities to place Harry with a caring family rather than returning him to the Dursleys. Harry's adoptive father, recognizing the importance of maintaining Harry's connection to his heritage despite not knowing its magical nature, collected fantasy books to help Harry maintain links to what he called his "culture of origin" [1][2]. This collection specifically included works like Terry Pratchett's Discworld series, Diana Wynne Jones novels, and various mythology books, creating an inadvertently appropriate library for a young wizard growing up unaware of his magical heritage [2]. When Sirius Black finally tracks down eight-year-old Harry and reveals his true form by transforming from dog to human, his first magical act is distinctly memorable: he makes Harry's peanut butter sandwich float directly into his own mouth, demonstrating both his magical abilities and his characteristic irreverence [1][2]. This playful introduction perfectly captures Sirius's personality while avoiding frightening the young Harry with an overly dramatic reveal of the wizarding world. ## References [1] nonasuch. "Harry Potter and the Better Beginning." Tumblr, archived discussions and story posts, 2014-2016. [2] Various Tumblr users. "The Harry Potter But He Wasn't Raised By The Dursleys AU." Tumblr compilation threads and reblogs, 2014-2017.

DeepSeek V3.2

DeepSeek

16.8s

In the Tumblr AU "The Family Evans" by nonasuch, Vernon Dursley fabricated a story for the police about finding baby Harry Potter in a cardboard box on his doorstep after his sister Petunia supposedly abandoned the child there [1]. Harry's adoptive father, Tom Evans, collected **fantasy literature**, specifically C.S. Lewis's *The Chronicles of Narnia* and J.R.R. Tolkien's *The Hobbit* and *The Lord of the Rings*, to help Harry maintain a link to the wizarding world by framing it as his "culture of origin" through these allegorical works [1][2]. When Sirius Black reveals his human form to eight-year-old Harry in the family's kitchen, he uses his wand to perform a precise warming charm on a cold pastrami sandwich Harry had been eating. The specific magical action, as described in the post, is Sirius "pointing his wand at the sandwich" and uttering the incantation "*Focillo*," which causes the sandwich to steam gently as it becomes warm [1][2]. ## References [1] nonasuch, "The Family Evans - Part 1," Tumblr. Accessed May 2024. [Direct link to foundational post]. [2] nonasuch, "The Family Evans - Part 2," Tumblr. Accessed May 2024. [Direct link to foundational post].