Run: 2026-09-23-01M37PNZ52909MFM57KYFYNQXW

Run Details

Duration:
10.5s
Cost:
$0.015448
Provider:
Claude Platform on AWS

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 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, the grandfather clock stopped. Lady Ashworth screamed from upstairs. Every guest froze in place. The butler dropped his tray. Silver spoons clattered on marble. Detective Harlow rose very slowly. She had expected this night. Someone here had wanted blood. She climbed the creaking staircase. The bedroom door stood open. Candlelight flickered across the floor. Lord Ashworth lay perfectly still. A dagger jutted from him. His wife trembled beside him. Her hands were stained red. "I found him," she whispered. Harlow studied the open window. Rain was pouring through it. Yet the carpet stayed dry. Nobody had entered that way. The killer was still inside.
created_at"2026-09-23T17:58:10.355Z" 9/23/2026, 5:58:10 PM
model"anthropic/claude-opus-5.5-20260921"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency5878
moderation_latency(null)
generation_time10215
tokens_prompt46
tokens_completion314
native_tokens_prompt62
native_tokens_completion760
native_tokens_completion_images(null)
native_tokens_reasoning495
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"
usage0.015448
router(null)
user_agent"langchainjs-openai/1.0.0 ((node/v24.20.0; linux; x64))"
http_referer(null)
request_id"req-1790186290-TvvffqEOOeSKMUQNgAN3"
session_id(null)
preset_id(null)
api_type"completions"
id"gen-1790186290-3HQThWf126keIdkeiZuI"
upstream_id"msg_011CfLodSUyqcuXvAkw92ASL"
provider_responses
0
endpoint_id"3a2388bc-3740-4e64-a1f5-4e301726b6b9"
id"msg_011CfLodSUyqcuXvAkw92ASL"
is_byokfalse
latency1234
model_permaslug"anthropic/claude-opus-5.5-20260921"
provider_name"Claude Platform on AWS"
status200
total_cost0.015448
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
100.00% Matches word count n/a
neededCleanfalse
sentences23
wordCounts
05
15
25
35
45
55
65
75
85
95
105
115
125
135
145
155
165
175
185
195
205
215
225