Run: 2026-02-24-01KJ8V99MMNEDTEH9NK02XS7V9

Run Details

Duration:
35.6s
Cost:
$0.059118
Provider:
Anthropic

Evaluation summary

Score Evaluator
Details Link
100.00% 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 at the edge of the cliff, its pale beam sweeping across the dark and restless sea. Detective Clara Morse arrived just after midnight, her coat soaked through and her breath forming clouds in the cold air. A young uniformed officer met her at the iron gate, his pale face already wearing the hollow look of shock. The body had been found inside the keeper's quarters, sprawled across the cold floor in a way suggesting deliberate murder. Clara knelt carefully beside the victim, a man she immediately recognized as the town's most beloved and fiercely reclusive historian. His eyes were fixed open, staring at the ceiling where someone had drawn a single, perfect red circle in chalk. Clara stood and slowly turned to the officer, asking one quiet question that would define every hour of the investigation. Who knew, she whispered, that this man held the one secret the entire town had struggled so desperately to bury?
created_at"2026-02-24T22:11:01.404Z" 2/24/2026, 10:11:01 PM
model"anthropic/claude-4.6-sonnet-20260217"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency585
moderation_latency(null)
generation_time35484
tokens_prompt46
tokens_completion1003
native_tokens_prompt61
native_tokens_completion3929
native_tokens_completion_images(null)
native_tokens_reasoning767
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"
usage0.059118
router(null)
provider_responses
0
endpoint_id"6d408764-7dd7-4626-bb87-a6cc1589bc86"
id"msg_01DQhX986QdZHpu5dU68qXHx"
is_byokfalse
latency555
model_permaslug"anthropic/claude-4.6-sonnet-20260217"
provider_name"Anthropic"
status200
api_type"completions"
id"gen-1771971061-qGypWtmaEsanC5qTbNle"
upstream_id"msg_01DQhX986QdZHpu5dU68qXHx"
total_cost0.059118
cache_discount(null)
upstream_inference_cost0
provider_name"Anthropic"

Evaluation details

Result Evaluator Details Meta Data
100.00% Matches word count n/a
neededCleanfalse
sentences8
wordCounts
020
120
220
320
420
520
620
720