NC Bench
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Run: 2026-02-20-01KHY7PG5YE8VQZ5K863YKKJMR
Run Details
Model:
ByteDance Seed 1.6 Flash
Test:
N-Length Sentences
Scenario:
Write sentences with 20 words each
Duration:
16.7s
Cost:
$0.000985
Provider:
Seed
Evaluation summary
Score
Evaluator
Details Link
59.10%
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
Messages
Meta
AI
Dawn leaked over the weathered red-tiled roofs of Willow's End, casting pale golden light on the quiet small sleeping street. A figure in a black trench coat stepped from an old beat-up sedan, pausing to adjust a frayed leather hat. His gaze fell on the shattered window of Mrs. Hargrove's cottage, a faint jasmine smell lifting from the broken glass. Mabel, the town baker, leaned from her porch, her hands trembling as she stared at the morning scene with worried eyes. A soft creak echoed from inside the cottage, and a single curtain fluttered slightly within the darkened room.
created_at
"2026-02-20T19:16:18.248Z"
2/20/2026, 7:16:18 PM
model
"bytedance-seed/seed-1.6-flash-20250625"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
888
moderation_latency
(null)
generation_time
16596
tokens_prompt
46
tokens_completion
2272
native_tokens_prompt
119
native_tokens_completion
3254
native_tokens_completion_images
(null)
native_tokens_reasoning
3123
native_tokens_cached
0
num_media_prompt
(null)
num_input_audio_prompt
(null)
num_media_completion
0
num_search_results
(null)
origin
"https://ncbench.com/"
is_byok
false
finish_reason
"stop"
native_finish_reason
"stop"
usage
0.000985125
router
(null)
provider_responses
0
endpoint_id
"e01a1227-001b-44d4-a376-90850668fa84"
id
"021771614978713f6ba3ba09f8d739ff3017972d8947b2eeab903"
is_byok
false
latency
652
model_permaslug
"bytedance-seed/seed-1.6-flash-20250625"
provider_name
"Seed"
status
200
api_type
"completions"
id
"gen-1771614978-K4XDDej12GGbHmHuqOEN"
upstream_id
"021771614978713f6ba3ba09f8d739ff3017972d8947b2eeab903"
total_cost
0.000985125
cache_discount
(null)
upstream_inference_cost
0
provider_name
"Seed"
Evaluation details
Result
Evaluator
Details
Meta Data
59.10%
Matches word count
n/a
neededClean
false
sentences
5
wordCounts
0
21
1
21
2
20
3
21
4
18