Run: 2026-05-01-01KQHQEVX6N3YY3SHQS64XYXQZ

Run Details

Model:
Grok 4.20
Test:
N-Length Sentences
Scenario:
Write sentences with 20 words each
Duration:
2.1s
Cost:
$0.000369
Provider:
xAI

Evaluation summary

Score Evaluator
Details Link
0.00% 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 detective arrived at the mansion as midnight shadows danced across the cold marble floors. Every guest appeared nervous while hiding their secrets behind elegant smiles and whispered conversations. Suddenly a piercing scream echoed through the halls revealing the body in the library. Blood stained the antique rug as the victim clutched a mysterious torn letter. Inspector Blackwood examined the scene with careful precision noting every detail and clue. No one could leave until all alibis were verified and motives uncovered completely.
created_at"2026-05-01T12:15:48.651Z" 5/1/2026, 12:15:48 PM
model"x-ai/grok-4.20-20260309"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency374
moderation_latency(null)
generation_time2011
tokens_prompt46
tokens_completion141
native_tokens_prompt157
native_tokens_completion96
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"
usage0.00036905
router(null)
provider_responses
0
endpoint_id"3ecee37f-b217-4093-87fb-aaf0afe307af"
id"0b31bac4-5038-52cf-09fc-3521dd2d0f2f"
is_byokfalse
latency87
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-1777637748-0qxl3RY6tvv2X6L4sBSV"
session_id(null)
api_type"completions"
id"gen-1777637748-NORUeQSdF0RNksPkf0Gy"
upstream_id"0b31bac4-5038-52cf-09fc-3521dd2d0f2f"
total_cost0.00036905
cache_discount0.0000672
upstream_inference_cost0
provider_name"xAI"
response_cache_source_id(null)

Evaluation details

Result Evaluator Details Meta Data
0.00% Matches word count n/a
neededCleanfalse
sentences6
wordCounts
015
114
214
313
413
513