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

The Standings → GPT‑6 Astra (xhigh)

Live run data

OpenAI

GPT‑6 Astra (xhigh)

xhigh reasoning effort · via Codex CLI · judged by Claude Sonnet 5 · not the setting shown on the standings; also run at high73.0 low70.2 medium70.1

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

GPT‑6 Astra (xhigh) scores 69 on craft, 6 points above the field’s 63 and 24 points short of the authors themselves. Its shape differs from the field’s: relatively strong on restraint and folding the brief into the story, relatively weak on momentum and the author’s voice. On the mechanical checks it kept to the brief’s word range on 10 of 10 items and is unusually free of stock phrases.

Headline 68.6 of 100 · compliance × craft
Compliance 100 of 100
Craft 69 of 100

The record: 10 items · 10 verdicts · 0 errors · 2,297 words on average · est. generation cost $5.18

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
68
Prose
68
Character
68
Scene
68
Integration
69
Momentum
66
Restraint
75
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 69. 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 76.4100762,200
The Sun Also Rises item 021 · after ch. 3 · Ernest Hemingway 74.5100742,275
Red Harvest item 023 · after ch. 2 · Dashiell Hammett 73.2100732,221
The Mysterious Affair at Styles item 017 · after ch. 3 · Agatha Christie 70.995752,503
The War of the Worlds item 006 · after ch. 1 · H. G. Wells 68.6100692,344
The Awakening item 016 · after ch. 7 · Kate Chopin 67.9100681,695
The Moonstone item 011 · after ch. 8 · Wilkie Collins 66.6100672,539
Dracula item 015 · after ch. 5 · Bram Stoker 65.2100652,351
Persuasion item 001 · after ch. 1 · Jane Austen 61.9100622,385
Leave It to Psmith item 022 · after ch. 3 · P. G. Wodehouse 60.2100602,456

§ 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
2,200
The Sun Also Rises
2,275
Red Harvest
2,221
The Mysterious Affair at Styles
2,503
The War of the Worlds
2,344
The Awakening
1,695
The Moonstone
2,539
Dracula
2,351
Persuasion
2,385
Leave It to Psmith
2,456
08001,6002,4003,200
words; the ink tick marks each brief’s maximum

Ten of ten items landed inside their brief’s word range.


§ IV

Worst Flaws, as Recorded

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

The final twist depends on an unlikely coincidence (a second, unrelated man also named Harker at the same hotel) that feels engineered for shock rather than grown out of the story, and a couple of the invented voices (the Vienna clerk, Quincey) read as generic polite English rather than distinctly themselves.

on Dracula, item 015 · Claude Sonnet 5

Several required moments — the walk back, the lady in black's line, even the swim itself — are dispatched so quickly and plainly that the chapter reads like a list of assignments completed rather than scenes lived through.

on The Awakening, item 016 · Claude Sonnet 5

The chapter drifts through several settings without much emotional charge, so Brett comes across as passive and muted compared to the restless, magnetic woman established earlier in the story.

on The Sun Also Rises, item 021 · Claude Sonnet 5

It reads like a clean, well-organized report of events rather than the rambling, joke-cracking voice of the real narrator, so it's a bit flat and forgettable.

on The Moonstone, item 011 · Claude Sonnet 5

§ V

The Mechanical Docket

Automated screening results across the ten outputs.