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Run: 2026-07-09-01KX40MSZJENK8X0R1CSN41TW2
Run Details
Model:
GPT-5.6 Terra (Reasoning)
Test:
N-Length Sentences
Scenario:
Write sentences with 20 words each
Duration:
10.5s
Cost:
$0.021642
Provider:
OpenAI
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 20 words. Please make sure that each sentence has the same length. Only return the opening itself.
Model response
Messages
Meta
AI
Rain worried the windows of Blackthorn Manor as Inspector Vale arrived, summoned by a voice that vanished before identifying itself. Inside, twelve guests stood silent beneath the chandelier, watching a silver dinner bell tremble beside the untouched crimson Persian carpet. Lord Blackthorn lay facedown beside the fireplace, one gloved hand clutching a torn photograph showing every guest in the room. His wife whispered that nobody had left, although Vale noticed muddy footprints leading from the corpse toward the locked conservatory. Then the bell rang again, and every guest turned toward the hallway where a child laughed softly behind them all. Vale drew his revolver, wondering which frightened face belonged to the murderer, and which belonged to the victim's terrified accomplice. On the mantel, a clock stopped at midnight, though Vale's watch insisted the stormy evening had only begun minutes ago. Somewhere above, floorboards creaked, followed by a woman's scream, abruptly cut short when the mansion lost all its lights entirely.
created_at
"2026-07-09T18:01:09.375Z"
7/9/2026, 6:01:09 PM
model
"openai/gpt-5.6-terra-20260709"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
2920
moderation_latency
(null)
generation_time
10349
tokens_prompt
46
tokens_completion
712
native_tokens_prompt
41
native_tokens_completion
1436
native_tokens_completion_images
0
native_tokens_reasoning
1234
native_tokens_cached
0
num_media_prompt
(null)
num_input_audio_prompt
(null)
num_media_completion
0
num_search_results
(null)
num_fetches
(null)
web_search_engine
(null)
origin
"https://ncbench.com/"
is_byok
false
finish_reason
"stop"
native_finish_reason
"completed"
service_tier
"default"
usage
0.0216425
router
(null)
provider_responses
0
endpoint_id
"3cc89000-ae34-4dde-9c7d-5ce009c8af0b"
id
"resp_0d813dc67ea787ad016a4fe1e57c408190aeae343c763e435f"
is_byok
false
latency
265
model_permaslug
"openai/gpt-5.6-terra-20260709"
provider_name
"OpenAI"
status
200
user_agent
"langchainjs-openai/1.0.0 ((node/v24.18.0; linux; x64))"
http_referer
(null)
request_id
"req-1783620069-86zRulKm6dE2w5A7TPEA"
session_id
(null)
preset_id
(null)
api_type
"completions"
id
"gen-1783620069-aKmMxKrRqQGj1OLggQDv"
upstream_id
"resp_0d813dc67ea787ad016a4fe1e57c408190aeae343c763e435f"
total_cost
0.0216425
cache_discount
(null)
upstream_inference_cost
0
provider_name
"OpenAI"
response_cache_source_id
(null)
data_region
"global"
Evaluation details
Result
Evaluator
Details
Meta Data
100.00%
Matches word count
n/a
neededClean
false
sentences
8
wordCounts
0
20
1
20
2
20
3
20
4
20
5
20
6
20
7
20