Run: 2026-02-24-01KJ8VDFA2B6SVWSKJ95RAVFY0

Run Details

Duration:
1m 10s
Cost:
$0.118248
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 had stood at the edge of Harrow Bay for nearly two hundred years without a single incident. Tonight, that quiet record finally ended, as Detective Clara Marsh stepped carefully around the body sprawled on the stone floor. The victim, a well dressed man in his early fifties, lay face down with both his arms stretched wide apart. A single white candle still flickered on the windowsill, casting long shadows that danced like nervous fingers across the walls. Clara knelt beside the body and found a small folded note tucked very carefully beneath the dead man's right hand. She did not dare touch it just yet, knowing fully that the hours ahead would demand her very sharpest attention. Outside, the bitter wind screamed through the jagged rocks below, and the dark sea churned with wild and furious energy. Someone had committed this terrible crime with care, with patience, and with a cold calculating intelligence that Clara almost admired.
created_at"2026-02-24T22:13:18.281Z" 2/24/2026, 10:13:18 PM
model"anthropic/claude-4.6-sonnet-20260217"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency741
moderation_latency(null)
generation_time69846
tokens_prompt46
tokens_completion1954
native_tokens_prompt61
native_tokens_completion7871
native_tokens_completion_images(null)
native_tokens_reasoning1713
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"
usage0.118248
router(null)
provider_responses
0
endpoint_id"6d408764-7dd7-4626-bb87-a6cc1589bc86"
id"msg_01V1fTTM2w7bwymaQ3dmSDsf"
is_byokfalse
latency719
model_permaslug"anthropic/claude-4.6-sonnet-20260217"
provider_name"Anthropic"
status200
api_type"completions"
id"gen-1771971198-uu9MoobUP6lxGGwBVfIB"
upstream_id"msg_01V1fTTM2w7bwymaQ3dmSDsf"
total_cost0.118248
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