NC Bench
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Run: 2026-02-20-01KHY7QPNEK3QXK4CMPBND5WHD
Run Details
Model:
ByteDance Seed 1.6 Flash
Test:
N-Length Sentences
Scenario:
Write sentences with 20 words each
Duration:
21.3s
Cost:
$0.001194
Provider:
Seed
Evaluation summary
Score
Evaluator
Details Link
74.84%
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 seeped over the old red roof, gilding the tall cobblestones, the stillness broken only by a distant rooster's crow. Mrs. Elara sat at the kitchen table, hands folded, a faint smile on her lips, throat slit wide, life draining. A single key, its teeth worn smooth, lay under the salt shaker, a fingerprint smudged on its cold, shiny surface. Detective Voss arrived, his boots crunching frost, a coffee cup in hand, the door creaking behind him softly. On the floor, beside the chair, lay a leather-bound book, its pages open to a poem about stars and secrets.
created_at
"2026-02-20T19:16:57.654Z"
2/20/2026, 7:16:57 PM
model
"bytedance-seed/seed-1.6-flash-20250625"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
419
moderation_latency
(null)
generation_time
21119
tokens_prompt
46
tokens_completion
2740
native_tokens_prompt
119
native_tokens_completion
3951
native_tokens_completion_images
(null)
native_tokens_reasoning
3808
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
0.001194225
router
(null)
provider_responses
0
endpoint_id
"e01a1227-001b-44d4-a376-90850668fa84"
id
"02177161501781882fba1344a9ed2fba97aa536d307b6cf3217a0"
is_byok
false
latency
317
model_permaslug
"bytedance-seed/seed-1.6-flash-20250625"
provider_name
"Seed"
status
200
api_type
"completions"
id
"gen-1771615017-a2BE06sOmCPsV4L6jRkL"
upstream_id
"02177161501781882fba1344a9ed2fba97aa536d307b6cf3217a0"
total_cost
0.001194225
cache_discount
(null)
upstream_inference_cost
0
provider_name
"Seed"
Evaluation details
Result
Evaluator
Details
Meta Data
74.84%
Matches word count
n/a
neededClean
false
sentences
5
wordCounts
0
20
1
20
2
20
3
18
4
21