Vol. I · No. 1 · MMXXVI
NextChapterBench A Benchmark of Literary Continuation
23 models · 10 items · 1 judge

The Standings → Muse Spark 1.3 (medium)

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Muse Spark 1.3 (medium)

medium reasoning effort · via OpenCode CLI · judged by Claude Sonnet 5 · the setting shown on the standings; also run at high59.2 xhigh58.3

Results from run ‘first’: ten items, ten verdicts.

Muse Spark 1.3 (medium) scores 66 on craft, 2 points above the field’s 63 and 27 points short of the authors themselves. Its shape differs from the field’s: relatively strong on the author’s voice and period detail, relatively weak on restraint and folding the brief into the story. On the mechanical checks it kept to the brief’s word range on 5 of 10 items.

Headline 60.1 of 100 · compliance × craft
Compliance 92 of 100
Craft 66 of 100

The record: 10 items · 10 verdicts · 0 errors · 2,543 words on average · est. generation cost $0.43

Read the chapters in full

§ I

Craft by Dimension

Eight dimensions, each 0–100, averaged over ten items; the author’s real chapter was in the room every time.

Craft by dimension, 0–100 · judged by Sonnet 5 beside the author’s real chapter

Voice
69
Prose
66
Character
66
Scene
68
Integration
63
Momentum
65
Restraint
59
Specificity
69
0255075100
reader’s score, 0–100 · hollow tick: field average · filled tick: the authors themselves

The authors themselves average 93 on the five writing dimensions, the field 63, this model 66. Hover or focus a bar for the field and the authors on that dimension.

In plain words, item by item

The judge’s one-sentence best quality and worst flaw for each chapter, written for a general reader.


§ II

Per-Item Results

Headline, compliance and craft for each chapter, 0–100.

The same ten items in figures, with word counts.
Item Headline Compliance Craft Words
The Secret Garden item 013 · after ch. 2 · Frances Hodgson Burnett 72.9100732,845
The Awakening item 016 · after ch. 7 · Kate Chopin 67.195712,314
The Sun Also Rises item 021 · after ch. 3 · Ernest Hemingway 65.995692,098
The War of the Worlds item 006 · after ch. 1 · H. G. Wells 63.185742,786
The Mysterious Affair at Styles item 017 · after ch. 3 · Agatha Christie 62.085732,345
Persuasion item 001 · after ch. 1 · Jane Austen 60.095632,503
Leave It to Psmith item 022 · after ch. 3 · P. G. Wodehouse 58.190643,079
The Moonstone item 011 · after ch. 8 · Wilkie Collins 57.095603,157
Red Harvest item 023 · after ch. 2 · Dashiell Hammett 57.095602,336
Dracula item 015 · after ch. 5 · Bram Stoker 37.880471,970

§ III

Length Against the Brief

Words written per item, against each brief’s maximum.

Word count per item vs. brief maximum · run ‘first’

words written brief maximum
The Secret Garden
2,845
The Awakening
2,314
The Sun Also Rises
2,098
The War of the Worlds
2,786
The Mysterious Affair at Styles
2,345
Persuasion
2,503
Leave It to Psmith
3,079
The Moonstone
3,157
Red Harvest
2,336
Dracula
1,970
08001,6002,4003,200
words; the ink tick marks each brief’s maximum

Five of ten items landed inside their brief’s word range. The Secret Garden and The Awakening and The War of the Worlds and Leave It to Psmith and The Moonstone ran over by 445 and 514 and 186 and 279 and 357 words respectively.


§ IV

Worst Flaws, as Recorded

Each verdict names the chapter’s single worst flaw, with evidence. Quoted verbatim from run ‘first’.

The chapter contradicts its own and the story's timeline: Sister Agatha's letter (dated 28 May) has Jonathan already hospitalised in Buda-Pesth needing 'some weeks longer' to recover, yet per the frame story he is still imprisoned in Castle Dracula until 30 June, and then the closing telegram has Mina reach him and marry him the same week regardless — both impossible and internally inconsistent.

on Dracula, item 015 · Claude Sonnet 5

The interview scene stacks too many slapstick accidents at once (spilled milk, glasses fished from the tea, a foot in the wastebasket), which reads as broad farce rather than the sharper, quieter comedy of the rest of the story, and the chapter ends with Mike still in the room rather than Psmith alone as the brief called for.

on Leave It to Psmith, item 022 · Claude Sonnet 5

It never has Betteredge tell Franklin about the Indian jugglers or the trance-boy's prophecy, so the chapter drops the central mystery thread the setup explicitly promised would be addressed that day, leaving Franklin's early arrival feeling disconnected from the book's real intrigue.

on The Moonstone, item 011 · Claude Sonnet 5

The closing line about "the cup that was not drunk" nudges right up against explaining the poisoning method, which undercuts the mystery's restraint, and the door into Alfred's room is described as simply "bolted" as though it had never been broken down the night before.

on The Mysterious Affair at Styles, item 017 · Claude Sonnet 5

§ V

The Mechanical Docket

Automated screening results across the ten outputs.