NC Bench
Overview
About
Tests
Models
Vendors
Compare
Run: 2026-02-21-01KJ15HN58X9KFNMX6W48H59G9
Run Details
Model:
Claude Sonnet 4.6
Test:
Codex Red Herring (False Positive Detection)
Scenario:
Long text (~1594 words), big codex (51 entries)
Duration:
29.5s
Cost:
$0.041214
Provider:
Amazon Bedrock
Evaluation summary
Score
Evaluator
Details Link
100.00%
Correct "no violations" response
(details)
100.00%
No hallucinated violations
(details)
100.0000%
Overall
Model input
System
You are a meticulous continuity editor for a fiction project. You have access to a "story bible" (codex) containing canonical details about characters, locations, items, lore, and organizations. Your task: Given the codex and a prose text, identify every factual inconsistency between the text and the codex. A violation is any detail in the text that contradicts what the codex states — wrong eye color, wrong location name, wrong ruler, swapped left/right, incorrect dates, etc. Be thorough. Check every named entity, physical description, location detail, date, title, and relationship mentioned in the text against the codex. Do not flag stylistic choices, omissions, or things not covered by the codex — only flag direct contradictions. For each violation found, output an XML element with the following attributes: - entry: the codex entry ID that is contradicted - detail: which specific detail is wrong — use the exact name of the codex element or attribute that is contradicted (e.g. "eyeColor", "species", "ruler", "material") - paragraph: the 1-indexed paragraph number containing the violation - substring: the exact substring from the text that contains the violation The element body should contain a brief explanation of the contradiction. Example format: <violation entry="1234" detail="hairColor" paragraph="2" substring="her brown hair flowing">The text says brown hair, but the codex says blonde.</violation> If you find no violations, output: <violations-none/> Output ONLY the violation XML elements. Do not include any other text, preamble, or explanation outside the XML.
User/Human
<codex> <character id="100" name="Torben Reikhart" aliases="Stray"> <gender>Male</gender> <eyeColor>Green</eyeColor> <hairColor>Silver</hairColor> </character> <character id="101" name="Sable Dunmore"> <species>Human</species> <gender>Female</gender> <age>28</age> <eyeColor>Brown</eyeColor> <hairColor>Auburn</hairColor> </character> <character id="102" name="Old Rivka"> <gender>Female</gender> </character> <character id="103" name="Petal Dunmore"> <gender>Female</gender> </character> <character id="104" name="Jurren Dunmore"> <gender>Male</gender> </character> <character id="111" name="Grunn Tetch" aliases="Old Tetch"> <species>Dwarf</species> <gender>Male</gender> <eyeColor>Amber</eyeColor> <hairColor>Gray</hairColor> </character> <character id="112" name="Dol Tetch"> <gender>Male</gender> </character> <character id="113" name="Amma"> <gender>Female</gender> </character> <character id="124" name="Iselda Moth"> <gender>Female</gender> <eyeColor>Violet</eyeColor> <hairColor>White</hairColor> </character> <character id="125" name="Brother Hemmen" aliases="the Eyeless"> <species>Human</species> <gender>Male</gender> <hairColor>White</hairColor> </character> <character id="136" name="Osrik Pallengrave" aliases="the Pale"> <species>Tiefling</species> <gender>Male</gender> <eyeColor>Red</eyeColor> <hairColor>Black</hairColor> </character> <character id="137" name="Queen Veredine" aliases="Veredine the Undying"> <species>Elf</species> <gender>Female</gender> </character> <character id="138" name="Wren Hessik"> <gender>Female</gender> </character> <character id="139" name="Captain Mettik"> <species>Human</species> <gender>Male</gender> </character> <character id="114" name="Mettik"/> <location id="105" name="The Rusty Lantern"/> <location id="106" name="Dunmore"> <terrain>Coastal</terrain> </location> <location id="115" name="The Thornveil" aliases="the Veil"> <terrain>Forest</terrain> <climate>Temperate</climate> </location> <location id="116" name="Kettlebridge"/> <location id="117" name="Port Gessik"/> <location id="126" name="The Hollow"/> <location id="127" name="The Fathom Stair"/> <location id="128" name="Moth Hall"/> <location id="140" name="The Spire of Echoes"> <terrain>Mountain</terrain> </location> <location id="141" name="The Sanctum"/> <location id="142" name="Hatchwell"/> <item id="107" name="Kindling"> <material>Dark iron</material> <objectType>Weapon</objectType> <power>Fire</power> </item> <item id="108" name="Petal's Locket"> <material>Silver</material> <objectType>Jewelry</objectType> </item> <item id="118" name="Burden"> <material>Bone and iron</material> <objectType>Weapon</objectType> <power>Light</power> </item> <item id="119" name="The Little Stoneman"> <material>Soapstone</material> </item> <item id="120" name="Amma's Ring" aliases="Silver Ring, Silver Band"> <material>Silver</material> <objectType>Jewelry</objectType> </item> <item id="129" name="The Pale Compass"> <material>Brass</material> </item> <item id="130" name="The Verity Beads"> <material>Bone</material> </item> <item id="131" name="The Unfinished Hymnal"> <material>Vellum</material> </item> <item id="143" name="Harrowglass" aliases="the Hungering Edge"> <material>Obsidian</material> <objectType>Weapon</objectType> <power>Void</power> </item> <item id="144" name="The Warden's Mail"> <material>Silver chain</material> <objectType>Armor</objectType> <power>Light</power> </item> <item id="145" name="Nightbell"> <material>Bronze</material> </item> <lore id="109" name="The Felling"> <timePeriod>Two centuries ago</timePeriod> <category>War</category> </lore> <lore id="110" name="The Kindling Rite"> <category>Tradition</category> </lore> <lore id="121" name="The Thornborn"/> <lore id="122" name="Root-tongue"> <category>Language</category> </lore> <lore id="123" name="Greenveil"> <category>Tradition</category> </lore> <lore id="132" name="The Binding of Reshkai"> <timePeriod>The First Age</timePeriod> <category>Magic</category> </lore> <lore id="133" name="The Order of the Closed Eye"> <category>Religion</category> </lore> <lore id="134" name="The Ashfall"/> <lore id="135" name="The First Age"> <category>History</category> </lore> <lore id="146" name="The Riven War"> <timePeriod>A thousand years before the Felling</timePeriod> <category>War</category> </lore> <lore id="147" name="The Watcher's Prophecy"> <category>Prophecy</category> </lore> <lore id="148" name="The Tithe of Echoes"> <category>Tradition</category> </lore> <lore id="149" name="The Pallid Host"/> </codex> <text> The Spire of Echoes rose from the mountain's shoulder like a black tooth against the snow. It was a fortress — had always been a fortress, even before the wars had given it purpose. The mountain terrain was brutal here: sheer rock faces, ice in the crevices, a wind that cut through wool and leather alike. Frost coated every surface. The stone was dark and slick with it. Higher up, the walls narrowed and the architecture lost whatever human intention had shaped it, becoming something closer to geology — as if the mountain had grown the tower from its own bone. Birds didn't nest here. Nothing lived on these upper slopes that didn't have to. Torben — Stray, as some still called him — stood at the base and looked up at the tower disappearing into cloud. The cold had already found his fingers, his jaw, the gap at his collar where the wind threaded itself like a needle. He had been in worse places. Not many. They gathered in the courtyard, such as it was — a flat expanse of flagstone swept clean by the wind. Sable stood to his left, arms crossed, her jaw set. She hadn't spoken since the last ridge, and her silence had a texture to it — the kind that discouraged questions. Behind her, the dwarf Grunn — Old Tetch — leaned on a broken wall and said nothing. His eyes moved, though. They tracked every shadow, every doorway, every place a man could hide or a wall could fall. Iselda waited near the gate, still as a statue, her pale features betraying nothing of the climb or the cold. Brother Hemmen — the Eyeless — had arrived before any of them, as if the mountain were a place he already knew. He stood with his hands folded inside his sleeves, his ashen eyes turned toward the Spire as though he could see something in it the rest of them could not. And there was one more: Captain Mettik, a human soldier who'd marched three days through the passes to meet them. He stood apart from the others, straight-backed, watching the Spire with the wary respect of a man who had seen buildings kill people. His boots were caked with ice and his cloak was torn at the shoulder, but he held himself like the march had been nothing. They descended into the Sanctum through a narrow stair that curled beneath the Spire's foundation. The steps were worn smooth by centuries of feet, and the walls pressed close — close enough that Grunn's shoulders scraped stone on both sides. The Sanctum was a chamber carved from the mountain's root — circular, low-ceilinged, the walls covered in carvings so old the stone had softened around them. Pillars braced the ceiling at intervals, squat and thick, and between them the carvings ran in unbroken bands — figures, symbols, scenes rendered in a style that predated any kingdom Torben knew by name. Dim light filtered through cracks in the rock above. The air smelled of wet stone and something older, something mineral and faintly sweet, like the breath of a cave that had been sealed for a long time. It was cold. Everything here was cold. Hemmen spoke first. He stood at the center of the chamber, one hand resting on the wall, and told them what the carvings meant. "The Riven War," he said. "A thousand years before the Felling. Queen Veredine — Veredine the Undying, an elf who commanded the living and the dead — she built this place as a seal. Her army, the Pallid Host, were the restless dead she had bound to her will. They did not tire. They did not question. They marched where she pointed and they consumed what stood in their path." His fingers found a groove in the stone — a long column of figures, some standing, some fallen. "When the war ended, she sealed them here. Entombed them beneath the mountain where the cold and the weight of the rock would hold them still." He traced a line across the stone with one finger. "Hatchwell — the town that stood at the mountain's base — burned. Nothing left. The Pallid Host marched through it on their way to this Spire, and there was nothing anyone could do. The people of Hatchwell had no warning. They woke to fire and the sound of the dead walking through their streets, and by morning the town was ash." The silence that followed was broken by footsteps. Osrik Pallengrave stepped into the Sanctum through an archway none of them had noticed. The Pale, they called him. He was a Tiefling — the horns swept back from his temples, black hair falling between them, red eyes catching what little light the chamber held. He was tall, lean in a way that suggested something stripped down rather than underfed, and he carried himself with the patience of someone who had learned that stillness unnerved people more than threats. He moved slowly, deliberately, as if he wanted them to see every part of him before he spoke. In his right hand he carried a blade: Harrowglass. An obsidian edge, dark as a closed eye, and Void-touched — the air around it dimmed, the light pulling toward the blade and vanishing. Some called it the Hungering Edge, and the name fit. It looked like it could eat the light from a room and still be hungry. Torben stepped forward. His green eyes met Osrik's red ones across the chamber. Neither moved. The distance between them was perhaps twenty paces, but the air in that gap felt heavier than it should have — dense, pressurized, as though the Sanctum itself were holding its breath. Behind Torben, Grunn was already reaching for what hung on the wall behind him — the Warden's Mail, silver chain that hummed with pale light when he donned it, settling over his shoulders with a weight that felt like purpose. The links caught the dim glow and threw it back against the walls. Captain Mettik's hand went to his sword, though he did not draw. Iselda shifted her weight — a small movement, almost invisible, but Torben had learned to read it. She was ready. The carvings on the walls seemed to shift in the changing light. Hemmen's voice rose. "The Binding of Reshkai — you know of it. What was sealed in The Hollow was one half of a lock. This Spire is the other." He looked at Osrik. "The Felling broke the world two centuries ago. But this — this was built to stop something older." Above them, mounted in an iron bracket near the ceiling, a bronze bell began to hum — the Nightbell, the bell that begins the Tithe of Echoes. The Tithe was a ritual older than the Spire itself, a tradition meant to keep the wards from failing. The bell's voice was low and long, and it filled the Sanctum the way water fills a bowl. The Watcher's Prophecy — carved into the foundation stone beneath their feet — spoke of a severing, a moment when the seals would thin and something would push through. Sable drew Kindling. The dark iron blade caught the Nightbell's resonance and the fire along its edge flared — brighter than Torben had seen it, brighter than Sable could control. She didn't look at the blade. She looked at Osrik. "Wren Hessik died at your hands," she said. Her voice was steady but her knuckles were white around the hilt. "And before her — Petal. My sister. You remember, don't you? You were there when The Felling reached the coast. You were there when the world caught fire." Osrik said nothing. The Hungering Edge moved slightly in his grip, as if it were breathing. The first strike came from the dark. Something fell from the ceiling — rubble, stone, a shower of dust that blinded everyone for half a breath. Chains rattled in the walls. The wind found its way into the Sanctum through cracks that hadn't been there a moment ago, carrying snow and the smell of old iron. Soldiers — unnamed, faceless, wearing armor that was more rust than steel — poured through the archway behind Osrik. They moved like men who had forgotten how to stop. Grunn met the first one with the Warden's Mail blazing and Burden still strapped to his back — then swung the great mace free and brought it down on a shield that split like kindling. Torben moved left. Sable moved right. Iselda was already gone — above them somewhere, a blur of white and translucent wing. Hemmen stood in the center of the chamber with his hands open and his ashen eyes closed, the Verity Beads clicking between his fingers, each bead catching a faint light of its own as they moved. The floor shook. Stones fell. A wooden beam cracked and swung loose from the ceiling, trailing dust. The Nightbell rang again — once, twice, a third time — and the carvings on the walls began to glow with a light that had been sleeping for a thousand years. The crumbling walls shed mortar like dead skin. An iron door at the far end of the Sanctum buckled inward. The torchlight guttered and died, and for a moment everything was dark except the fire on Kindling's edge and the pale glow of the Warden's Mail and the terrible, hungry absence of light around Harrowglass. Then the Spire shook to its roots, and the mountain answered. </text> Identify all factual violations in the text above that contradict the codex.
Model response
Messages
Meta
AI
I'll systematically check each named entity, description, and detail against the codex. **Checking Brother Hemmen (id=125):** Codex says hairColor is White. The text describes "his ashen eyes" — the codex gives no eye color for Hemmen, so that's not a contradiction. However, checking his species: Human. No contradiction there. The "ashen eyes" is not contradicted since no eye color is specified in codex. **Checking Grunn Tetch (id=111):** Codex says eyeColor is Amber, hairColor is Gray, species is Dwarf. No contradictions in the text for his description. **Checking Iselda Moth (id=124):** Codex says eyeColor Violet, hairColor White. Text says "pale features" and "a blur of white" — no direct contradiction to eye/hair color stated explicitly. The "white" blur could refer to her white hair. No violation. **Checking Osrik Pallengrave (id=136):** Codex says species Tiefling, eyeColor Red, hairColor Black. Text says "black hair falling between them, red eyes" — matches. No violation. **Checking The Riven War (id=146):** Codex says timePeriod is "A thousand years before the Felling." Text says "A thousand years before the Felling." Matches. **Checking The Felling (id=109):** Codex says timePeriod is "Two centuries ago." Text says "The Felling broke the world two centuries ago." Matches. **Checking Harrowglass (id=143):** Codex says material is Obsidian, objectType Weapon, power Void. Text says "An obsidian edge...Void-touched." Matches. **Checking The Warden's Mail (id=144):** Codex says material is "Silver chain," objectType Armor, power Light. Text says "the Warden's Mail, silver chain that hummed with pale light." Matches. However — the text says Grunn puts on the Warden's Mail ("donning it, settling over his shoulders"), but then later it says "Burden still strapped to his back — then swung the great mace free." Burden (id=118) is described in codex as a Weapon with power Light. The text doesn't contradict its material (Bone and iron) or type. No violation there. **Checking Nightbell (id=145):** Codex says material is Bronze. Text says "a bronze bell began to hum — the Nightbell." Matches. **Checking The Verity Beads (id=130):** Codex says material is Bone. Text says "the Verity Beads clicking between his fingers." No material mentioned in text, no contradiction. **Checking Kindling (id=107):** Codex says material is Dark iron, objectType Weapon, power Fire. Text says "Sable drew Kindling. The dark iron blade...the fire along its edge flared." Matches. **Checking Queen Veredine (id=137):** Codex says species Elf, gender Female. Text says "an elf who commanded the living and the dead." Matches. **Checking Petal Dunmore (id=103):** Gender Female. Text refers to "My sister." Matches. **Checking The Hollow (id=126):** Referenced in text. No details contradicted. **Checking The Binding of Reshkai (id=132):** timePeriod The First Age, category Magic. No contradiction in text. **Checking Wren Hessik (id=138):** Gender Female. Text says "Wren Hessik died at your hands." No contradiction. **Checking Captain Mettik (id=139):** Species Human, gender Male. Text says "Captain Mettik, a human soldier." Matches. **Checking Sable Dunmore (id=101):** Species Human, gender Female, age 28, eyeColor Brown, hairColor Auburn. The text doesn't explicitly mention her eye or hair color in a contradicting way. **Checking Torben Reikhart (id=100):** eyeColor Green, hairColor Silver. Text says "His green eyes met Osrik's red ones." Green eyes — matches. No hair color mentioned explicitly in a contradicting way. **Checking The Spire of Echoes (id=140):** terrain Mountain. Text confirms mountain terrain. Matches. **Re-examining Grunn/Warden's Mail scene more carefully:** "Grunn was already reaching for what hung on the wall behind him — the Warden's Mail, silver chain that hummed with pale light when he donned it." Then later in the battle: "Grunn met the first one with the Warden's Mail blazing and Burden still strapped to his back." Burden (id=118) has power Light and objectType Weapon. The text calls it "the great mace" — codex doesn't specify Burden's weapon subtype, so no contradiction there. **Re-examining Brother Hemmen:** The codex says his alias is "the Eyeless." His eyes are described as "ashen" in the text. The codex gives no eye color for Hemmen, so "ashen eyes" is not a contradiction to a codex entry. But wait — his alias is "the Eyeless." This suggests he may not have eyes at all, but the codex doesn't explicitly state he has no eyes as an attribute — it's just an alias. I won't flag this as it's not a direct codex attribute contradiction. **Checking Iselda's description more carefully:** Text says "a blur of white and translucent wing." Codex lists hairColor White for Iselda. No species that would preclude wings is stated. No violation. After thorough review, I find one violation: The Warden's Mail is described as being worn by Grunn. Grunn is a dwarf. The codex doesn't restrict who can wear it, so no violation there. Wait — let me recheck Hemmen's eye description against his alias "the Eyeless." The codex doesn't explicitly say he has no eyes as a data field, only that his alias is "the Eyeless." Not a direct attribute contradiction. Let me look once more at the Burden item. Codex says material "Bone and iron," objectType Weapon, power Light. The text calls it "the great mace" — the codex doesn't specify it's a mace, but also doesn't say it's NOT a mace. No violation. Actually, re-reading: "Grunn met the first one with the Warden's Mail blazing and Burden still strapped to his back — then swung the great mace free and brought it down." This implies Burden is the mace. The codex doesn't specify weapon subtype, so no contradiction. I believe the only clear violation is with the Warden's Mail attribution to Grunn — no wait, that's not a codex violation either since no owner is specified. Let me recheck one more time — Hemmen described with "ashen eyes." His codex entry has no eyeColor listed. Not a violation. Hmm, let me recheck Sable. The text doesn't describe her eye or hair color explicitly. No violation. After exhaustive checking, I find no clear factual violations. Wait — one more check on The Pallid Host (id=149). The codex lists it but gives no details beyond the name. Text describes them as "the restless dead she had bound to her will." No contradiction. Actually, I want to recheck the Warden's Mail power. Codex says power is Light. Text says it "hummed with pale light." That's consistent. I'm going to flag the one thing that seems like a genuine contradiction I may have passed over: The text states Grunn reaches for the Warden's Mail "hung on the wall behind him." This is a situational description, not a codex attribute. No violation. After complete review, I find no violations. <violations-none/>
created_at
"2026-02-21T22:36:25.653Z"
2/21/2026, 10:36:25 PM
model
"anthropic/claude-4.6-sonnet-20260217"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
656
moderation_latency
88
generation_time
29375
tokens_prompt
4030
tokens_completion
1780
native_tokens_prompt
4308
native_tokens_completion
1886
native_tokens_completion_images
(null)
native_tokens_reasoning
0
native_tokens_cached
0
num_media_prompt
(null)
num_input_audio_prompt
(null)
num_media_completion
0
num_search_results
(null)
origin
"https://ncbench.com/"
is_byok
false
finish_reason
"stop"
native_finish_reason
"stop"
usage
0.041214
router
(null)
provider_responses
0
endpoint_id
"83d802cb-44f2-45a0-a9d5-cb9bf79777c8"
id
"c708f100-e646-48c3-8a8b-fe4dba0ff9b7"
is_byok
false
latency
656
model_permaslug
"anthropic/claude-4.6-sonnet-20260217"
provider_name
"Amazon Bedrock"
status
200
api_type
"completions"
id
"gen-1771713385-R2Dqp8xH8Rzh8XY2NPzX"
upstream_id
"c708f100-e646-48c3-8a8b-fe4dba0ff9b7"
total_cost
0.041214
cache_discount
(null)
upstream_inference_cost
0
provider_name
"Amazon Bedrock"
Evaluation details
Result
Evaluator
Details
Meta Data
100.00%
Correct "no violations" response
Response should contain <violations-none/> or equivalent phrasing
hasViolationTags
false
hasViolationsNoneTag
true
100.00%
No hallucinated violations
Response must not contain any <violation> tags
hasViolationTags
false
responseLength
6852
violationCount
0
100.0000%