Run: 2026-02-24-01KJ8V0Z27KQMXC364YBTSQCP2

Run Details

Duration:
40.1s
Cost:
$0.092380
Provider:
Amazon Bedrock

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 body lay crumpled at the foot of the grand staircase, her pale hands still clutching a torn red envelope. Detective Harris arrived at the Whitmore estate just after midnight, cold rain dripping from his coat onto the marble floor. No one had heard a scream, and yet the expression frozen on her face suggested she had seen something terrible. The other guests were gathered in the drawing room, each wearing a careful mask of shock and quiet, practiced composure. Lord Whitmore stood by the fireplace, swirling brandy in a crystal glass, refusing to look anyone directly in the eye. His young wife, Catherine, sat in the corner, her silk dress stained with something dark that she refused to explain. The detective noted that every single person in the room had a reason to want the dead woman silenced forever. Outside, thunder rolled across the moors, and the only road leading away from the estate had flooded beyond any crossing. They were all trapped together now, the killer among them, and the long night was only just beginning to unfold. Harris pulled a notebook from his coat pocket and turned to face the room with a gaze that missed nothing.
created_at"2026-02-24T22:06:28.432Z" 2/24/2026, 10:06:28 PM
model"anthropic/claude-4.6-opus-20260205"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency1511
moderation_latency162
generation_time39829
tokens_prompt46
tokens_completion887
native_tokens_prompt61
native_tokens_completion3683
native_tokens_completion_images(null)
native_tokens_reasoning580
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"
usage0.09238
router(null)
provider_responses
0
endpoint_id"a8708fb9-08ea-43bb-a3b1-165c87ef09df"
id"bcb077d9-ab4e-4f15-87d2-a464ebdfddff"
is_byokfalse
latency1416
model_permaslug"anthropic/claude-4.6-opus-20260205"
provider_name"Amazon Bedrock"
status200
api_type"completions"
id"gen-1771970788-m3o5DyJoVy8Tok0To047"
upstream_id"bcb077d9-ab4e-4f15-87d2-a464ebdfddff"
total_cost0.09238
cache_discount(null)
upstream_inference_cost0
provider_name"Amazon Bedrock"

Evaluation details

Result Evaluator Details Meta Data
100.00% Matches word count n/a
neededCleanfalse
sentences10
wordCounts
020
120
220
320
420
520
620
720
820
920