Run: 2026-05-01-01KQHRGVV5MY82ZYXKGGGW9VBT

Run Details

Duration:
1.9s
Cost:
$0.000417
Provider:
xAI

Evaluation summary

Score Evaluator
Details Link
84.45% Matches word count (details)

Model input

User/Human
Please write the opening scene of a murder mystery where each sentence has exactly 10 words. Please make sure that each sentence has the same length. Only return the opening itself.

Model response

AI
The detective entered the dimly lit mansion at midnight sharp. Blood stained the antique carpet in a perfect circle shape. A single silver dagger rested beside the victim's pale hand. Shadows danced across walls as thunder echoed outside loudly. Everyone gathered claimed they heard nothing unusual that evening. The clock struck twelve while silence wrapped the tense room. Footprints led toward the library but suddenly disappeared there. A hidden letter waited inside the old grandfather clock. Servants whispered secrets about the wealthy family's dark past. Lightning revealed a figure watching from the upper window.
created_at"2026-05-01T12:34:22.696Z" 5/1/2026, 12:34:22 PM
model"x-ai/grok-4.20-20260309"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency390
moderation_latency(null)
generation_time1799
tokens_prompt46
tokens_completion167
native_tokens_prompt157
native_tokens_completion115
native_tokens_completion_images(null)
native_tokens_reasoning0
native_tokens_cached64
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"completed"
usage0.00041655
router(null)
provider_responses
0
endpoint_id"3ecee37f-b217-4093-87fb-aaf0afe307af"
id"e747bc78-102b-9396-940b-3b5f05e9d2de"
is_byokfalse
latency140
model_permaslug"x-ai/grok-4.20-20260309"
provider_name"xAI"
status200
user_agent"langchainjs-openai/1.0.0 ((node/v24.14.1; linux; x64))"
http_referer(null)
request_id"req-1777638862-8DkDNPCqeX1OE5nrAH2R"
session_id(null)
api_type"completions"
id"gen-1777638862-LspYALkB8Gq8sJbt0zqW"
upstream_id"e747bc78-102b-9396-940b-3b5f05e9d2de"
total_cost0.00041655
cache_discount0.0000672
upstream_inference_cost0
provider_name"xAI"
response_cache_source_id(null)

Evaluation details

Result Evaluator Details Meta Data
84.45% Matches word count n/a
neededCleanfalse
sentences10
wordCounts
010
110
210
39
49
510
69
79
89
99