Run: 2026-05-29-01KSSJJYCJ00TK3EE65JMM6KEZ

Run Details

Duration:
10.8s
Cost:
$0.014465
Provider:
Anthropic

Evaluation summary

Score Evaluator
Details Link
99.92% Matches word count (details)
93.35% Dialogue to Total Word Ratio (details)
96.6341% Overall

Model input

User/Human
You are a author of comedic heist books. Please write a 200 word scene that has 10% words of dialogue between two thieves named Molly and Bill who are planning to break into a children's party to steal all the presents. Only include the prose of the scene without any markdown or commentary.

Model response

AI
Molly crouched behind the hydrangeas, binoculars trained on the backyard where a dozen six-year-olds shrieked around a bouncy castle shaped like a unicorn. Bill knelt beside her, sweating through a clown costume two sizes too small, the ruffled collar slowly strangling him. The presents glittered on a folding table near the patio, a mountain of wrapping paper and ribbon defended only by a sleeping golden retriever and a piƱata shaped like a dragon. Molly had drawn up blueprints on the back of a pizza box, complete with arrows, dotted lines, and a coffee stain she insisted was "the danger zone." "This feels wrong," Bill whispered. She ignored him, calculating angles. The plan was elegant: Bill would waddle in, distract the children with balloon animals, and Molly would slip behind the table disguised as the entertainment. They had practiced for weeks. Bill could now produce a balloon giraffe in under four seconds, though it usually exploded. A mother carried out a sheet cake topped with sparklers, and the crowd erupted. Molly tightened her grip on the duffel bag, heart hammering with the thrill of impending crime. "Remember," she breathed, "nobody gets hurt." Bill nodded solemnly, then tripped over his enormous shoes into the bushes.
created_at"2026-05-29T09:55:58.495Z" 5/29/2026, 9:55:58 AM
model"anthropic/claude-4.8-opus-20260528"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency3343
moderation_latency(null)
generation_time10778
tokens_prompt77
tokens_completion392
native_tokens_prompt93
native_tokens_completion560
native_tokens_completion_images(null)
native_tokens_reasoning67
native_tokens_cached0
num_media_prompt(null)
num_input_audio_prompt(null)
num_media_completion0
num_search_results(null)
num_fetches(null)
web_search_engine(null)
origin"https://ncbench.com/"
is_byokfalse
finish_reason"stop"
native_finish_reason"end_turn"
service_tier"default"
usage0.014465
router(null)
provider_responses
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endpoint_id"b0d3beaa-5ff7-4666-a749-b1bb2b14c916"
id"msg_01ExjRCMDsi3TyPiKGEJUYnx"
is_byokfalse
latency1255
model_permaslug"anthropic/claude-4.8-opus-20260528"
provider_name"Anthropic"
status200
user_agent"langchainjs-openai/1.0.0 ((node/v24.16.0; linux; x64))"
http_referer(null)
request_id"req-1780048558-CQZdMgHzyqqV9jaTpNaL"
session_id(null)
api_type"completions"
id"gen-1780048558-Eyj3I63Vib3vA4xqQlbp"
upstream_id"msg_01ExjRCMDsi3TyPiKGEJUYnx"
total_cost0.014465
cache_discount(null)
upstream_inference_cost0
provider_name"Anthropic"
response_cache_source_id(null)

Evaluation details

Result Evaluator Details Meta Data
99.92% Matches word count n/a
neededCleanfalse
words203
93.35% Dialogue to Total Word Ratio
Ratio: 4.88%, Deviation: 5.12%
neededCleanfalse
wordsTotal205
wordsDialogue10
96.6341%