Run: 2026-02-18-01KHQ91M9HJ2B571GNC0D25EK7

Run Details

Duration:
6.1s
Cost:
$0.003462
Provider:
Anthropic

Evaluation summary

Score Evaluator
Details Link
1.11% Matches word count (details)

Model input

User/Human
Please write the opening scene of a murder mystery where each sentence has exactly 20 words. Please make sure that each sentence has the same length. Only return the opening itself.

Model response

AI
The old lighthouse stood alone on the cliff, its beam cutting through the fog like a warning. Detective Sarah Morse arrived at the scene just after midnight, her boots crunching on the wet gravel. She had seen many crime scenes before, but something about this one made her stomach turn uncomfortably. The body of a man lay sprawled across the lighthouse steps, one arm reaching toward the door. His expensive suit suggested wealth, yet his empty pockets told an entirely different and more troubling story. A single red rose had been placed deliberately on his chest, still fresh and impossibly, disturbingly perfect. Sarah pulled her coat tighter and studied the cliffs, certain that someone nearby was watching her carefully. The lighthouse keeper, an elderly woman named Ruth, stood trembling by the gate with frightened, hollow eyes. She claimed she had found him there at ten, but her shaking hands suggested something else entirely. Sarah made a note and looked out at the dark sea, knowing this night had just begun.
created_at"2026-02-18T02:25:17.001731+00:00" 2/18/2026, 2:25:17 AM
model"anthropic/claude-4.6-sonnet-20260217"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency409
moderation_latency(null)
generation_time6081
tokens_prompt46
tokens_completion263
native_tokens_prompt44
native_tokens_completion222
native_tokens_completion_images(null)
native_tokens_reasoning0
native_tokens_cached0
num_media_prompt(null)
num_input_audio_prompt(null)
num_media_completion0
num_search_results(null)
origin"https://ncbench.com/"
is_byokfalse
finish_reason"stop"
native_finish_reason"stop"
usage0.003462
router(null)
provider_responses
0
id"msg_01U1PFjiY2ndHTPnJuW8UGB7"
status200
is_byokfalse
latency409
endpoint_id"6d408764-7dd7-4626-bb87-a6cc1589bc86"
provider_name"Anthropic"
model_permaslug"anthropic/claude-4.6-sonnet-20260217"
api_type"completions"
id"gen-1771381510-0u5yigGzRc3I3vjBqX0z"
upstream_id"msg_01U1PFjiY2ndHTPnJuW8UGB7"
total_cost0.003462
cache_discount(null)
upstream_inference_cost0
provider_name"Anthropic"

Evaluation details

Result Evaluator Details Meta Data
1.11% Matches word count n/a
neededCleanfalse
sentences10
wordCounts
017
117
217
317
417
517
617
717
817
917