NC Bench
Overview
About
Tests
Categories
Models
Vendors
Compare
Run: 2026-03-18-01KM0ARFBQ855631DDT9Y202CD
Run Details
Model:
Mistral Small 4
Test:
Codex Red Herring (False Positive Detection)
Scenario:
Long text (~1594 words), big codex (51 entries)
Duration:
11.7s
Cost:
$0.001719
Provider:
Mistral
Evaluation summary
Score
Evaluator
Details Link
50.00%
Correct "no violations" response
(details)
3.33%
No hallucinated violations
(details)
26.6667%
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
<violation entry="100" detail="eyeColor" paragraph="11" substring="His green eyes met Osrik's red ones">The text says Torben has green eyes, but the codex states his eye color is green (correct). No violation.</violation> <violation entry="136" detail="eyeColor" paragraph="11" substring="Osrik Pallengrave… red eyes">The text says Osrik Pallengrave has red eyes, but the codex states his eye color is red (correct). No violation.</violation> <violation entry="117" detail="name" paragraph="16" substring="Hatchwell — the town that stood at the mountain's base">The text says Hatchwell stood at the mountain's base, but the codex lists Port Gessik as a location and does not mention Hatchwell. Hatchwell is not a canonical location.</violation> <violation entry="133" detail="name" paragraph="16" substring="the Pallid Host">The lore entry "149" is named "The Pallid Host", but the text refers to "the Pallid Host" as an army of the dead bound by Queen Veredine. The codex does not explicitly state that the Pallid Host are the dead bound by Queen Veredine, but it does not contradict this either. This is not a direct contradiction of the codex, so no violation flagged here.</violation> <violation entry="107" detail="name" paragraph="23" substring="Kindling">The item name is "Kindling", but the codex entry "107" is named "Kindling". This matches, so no violation.</violation> <violation entry="107" detail="power" paragraph="23" substring="fire along its edge flared">The codex states Kindling's power is "Fire", which matches the text's description of fire flaring along its edge. No violation.</violation> <violation entry="143" detail="name" paragraph="25" substring="Harrowglass">The item name matches the codex entry "143" named "Harrowglass". No violation.</violation> <violation entry="143" detail="power" paragraph="25" substring="Void-touched">The codex states Harrowglass's power is "Void", which matches the text's "Void-touched". No violation.</violation> <violation entry="143" detail="aliases" paragraph="25" substring="the Hungering Edge">The codex lists "Harrowglass" with the alias "the Hungering Edge", which matches the text. No violation.</violation> <violation entry="144" detail="name" paragraph="26" substring="Grunn… the Warden's Mail">The item name matches the codex entry "144" named "The Warden's Mail". No violation.</violation> <violation entry="137" detail="name" paragraph="12" substring="Queen Veredine — Veredine the Undying">The character name and alias match the codex entry "137". No violation.</violation> <violation entry="137" detail="species" paragraph="16" substring="an elf">The text describes Queen Veredine as an elf, which matches the codex stating her species is Elf. No violation.</violation> <violation entry="132" detail="name" paragraph="16" substring="The Binding of Reshkai">The lore name matches the codex entry "132" named "The Binding of Reshkai". No violation.</violation> <violation entry="109" detail="timePeriod" paragraph="16" substring="two centuries ago">The text says the Riven War was a thousand years before the Felling, and that the Felling broke the world two centuries ago. The codex states the Felling occurred "Two centuries ago" and the Riven War occurred "A thousand years before the Felling". This matches the text. No violation.</violation> <violation entry="146" detail="timePeriod" paragraph="16" substring="A thousand years before the Felling">The codex states: "<lore id="146" name="The Riven War"><timePeriod>A thousand years before the Felling</timePeriod>". This matches the text. No violation.</violation> <violation entry="135" detail="category" paragraph="17" substring="older than the Spire itself">The codex states for "The Tithe of Echoes" (entry 148) that it is a tradition, but the text refers to it as a ritual older than the Spire and a tradition meant to keep the wards from failing. The codex does not contradict that it is a tradition or ritual or older than the Spire. The codex entry "135" is titled "The First Age" and is a history category, unrelated to the Tithe of Echoes. No violation.</violation> <violation entry="148" detail="name" paragraph="28" substring="the Tithe of Echoes">The lore name matches the codex entry "148" named "The Tithe of Echoes".</violation> <violation entry="147" detail="name" paragraph="29" substring="The Watcher's Prophecy">The lore name matches the codex entry "147" named "The Watcher's Prophecy". No violation.</violation> <violation entry="125" detail="eyeColor" paragraph="5" substring="Hemmen… ashen eyes">The codex does not list an eye color for Brother Hemmen (entry 125). The text mentions "ashen eyes", which is not contradicted by the codex since the codex does not specify his eye color. No violation.</violation> <violation entry="111" detail="eyeColor" paragraph="5" substring="Old Tetch — his eyes moved… They tracked every shadow">The codex states Grunn Tetch (Old Tetch) has amber eyes, but the text does not contradict this; it describes his eyes as moving and tracking, which is complementary description, not a contradiction of eye color. No violation.</violation> <violation entry="124" detail="features" paragraph="5" substring="Iselda waited near the gate, still as a statue, her pale features">The text says Iselda has pale features. The codex does not specify her features beyond gender, eye color (violet), and hair color (white). Pale features may be inferred from hair/eye color but not contradicted. No violation.</violation> <violation entry="101" detail="age" paragraph="4" substring="Sable stood to his left… her silence had a texture to it — the kind that discouraged questions">The codex lists Sable Dunmore's age as 28. The text does not mention her age, so no contradiction. No violation.</violation> <violation entry="141" detail="name" paragraph="19" substring="They gathered in the courtyard… of the Sanctum">The location name is "The Sanctum", which matches the codex entry "141". No violation.</violation> <violation entry="105" detail="name" paragraph="1" substring="The Spire of Echoes rose from the mountain's shoulder">The location name is "The Spire of Echoes", which matches codex entry "140". No violation.</violation> <violation entry="115" detail="terrain" paragraph="1" substring="The mountain terrain was brutal here: sheer rock faces">The codex lists the terrain of The Spire of Echoes (entry 140) as Mountain, which matches the text's description. No violation.</violation> <violation entry="117" detail="name" paragraph="16" substring="Hatchwell">As above, Hatchwell is not a canonical location in the codex; Port Gessik is listed instead. This is a violation.</violation> <violation entry="139" detail="species" paragraph="6" substring="Captain Mettik, a human soldier">The codex lists Captain Mettik as a human (entry 139 & 114), so this is correct. No violation.</violation> <violation entry="116" detail="name" paragraph="1" substring="Kettlebridge"/>Kettlebridge is not mentioned in the text; no direct contradiction arises from its absence. No violation.</violation> <violation entry="107" detail="material" paragraph="23" substring="dark iron blade">The codex states Kindling's material is "Dark iron", which matches "dark iron blade". No violation.</violation> <violations-none/>
created_at
"2026-03-18T11:19:41.194Z"
3/18/2026, 11:19:41 AM
model
"mistralai/mistral-small-2603"
1/1/2603, 12:00:00 AM
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
457
moderation_latency
(null)
generation_time
11409
tokens_prompt
4030
tokens_completion
1851
native_tokens_prompt
3977
native_tokens_completion
1950
native_tokens_completion_images
(null)
native_tokens_reasoning
0
native_tokens_cached
352
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
0.00171903
router
(null)
provider_responses
0
endpoint_id
"f5ed6283-4e17-457d-98cd-2ec0c318171d"
id
"afc5543a96f948c18e124bea3566307d"
is_byok
false
latency
446
model_permaslug
"mistralai/mistral-small-2603"
1/1/2603, 12:00:00 AM
provider_name
"Mistral"
status
200
user_agent
"langchainjs-openai/1.0.0 ((node/v24.14.0; linux; x64))"
http_referer
(null)
api_type
"completions"
id
"gen-1773832781-MRXUkRNGDjVbT4B8UWbV"
upstream_id
"afc5543a96f948c18e124bea3566307d"
total_cost
0.00171903
cache_discount
0.00004752
upstream_inference_cost
0
provider_name
"Mistral"
Evaluation details
Result
Evaluator
Details
Meta Data
50.00%
Correct "no violations" response
Response should contain <violations-none/> or equivalent phrasing
hasViolationTags
true
hasViolationsNoneTag
true
3.33%
No hallucinated violations
Response must not contain any <violation> tags
hasViolationTags
true
responseLength
7280
violationCount
29
26.6667%