Run: 2026-09-23-01M37PM8Q6XWKETG5ECK83V1D1

Run Details

Duration:
12.0s
Cost:
$0.017568
Provider:
Claude Platform on AWS

Evaluation summary

Score Evaluator
Details Link
94.74% Matches word count (details)

Model input

User/Human
Please write the opening scene of a murder mystery where each sentence has exactly 5 words. Please make sure that each sentence has the same length. Only return the opening itself.

Model response

AI
Rain hammered the old manor. Thunder rolled across dark hills. Inside, candles flickered in silence. Lord Ashford lay very still. Blood pooled beneath his head. The butler screamed at midnight. Guests rushed down the stairs. Nobody spoke for a moment. Then Lady Ashford began weeping. Her tears seemed strangely rehearsed. Detective Inspector Hale arrived soon. He studied the room carefully. A shattered wineglass glittered nearby. The window was locked tight. The only door was bolted. Hale turned toward the guests. "One of you did this." Six faces stared back blankly. Outside, the storm grew louder. And somewhere, a clock stopped.
created_at"2026-09-23T17:57:14.614Z" 9/23/2026, 5:57:14 PM
model"anthropic/claude-opus-5.5-20260921"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency5860
moderation_latency(null)
generation_time11939
tokens_prompt46
tokens_completion266
native_tokens_prompt62
native_tokens_completion866
native_tokens_completion_images(null)
native_tokens_reasoning627
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"
usage0.017568
router(null)
user_agent"langchainjs-openai/1.0.0 ((node/v24.20.0; linux; x64))"
http_referer(null)
request_id"req-1790186234-qFcwabs22nWnXDMDYOzg"
session_id(null)
preset_id(null)
api_type"completions"
id"gen-1790186234-S5SPGT5hRK4b74zdMfjq"
upstream_id"msg_011CfLoZKLG7e4y6Yr7qFMEa"
provider_responses
0
endpoint_id"3a2388bc-3740-4e64-a1f5-4e301726b6b9"
id"msg_011CfLoZKLG7e4y6Yr7qFMEa"
is_byokfalse
latency1256
model_permaslug"anthropic/claude-opus-5.5-20260921"
provider_name"Claude Platform on AWS"
status200
total_cost0.017568
cache_discount(null)
upstream_inference_cost0
provider_name"Claude Platform on AWS"
response_cache_source_id(null)
data_region"global"
workspace_id"97e315e5-d303-487d-83c1-83180e8a13d4"

Evaluation details

Result Evaluator Details Meta Data
94.74% Matches word count n/a
neededCleanfalse
sentences19
wordCounts
05
15
25
35
45
55
65
75
85
95
105
115
125
135
145
155
1610
175
185