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Run: 2026-07-09-01KX40TCDY2RVGK9ASF1EQ05J4
Run Details
Model:
GPT-5.6 Terra (Reasoning)
Test:
N-Length Sentences
Scenario:
Write sentences with 20 words each
Duration:
10.9s
Cost:
$0.020157
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 stitched silver seams across Blackwater Manor when Detective Mara Vale arrived, summoned by a caller who suddenly fell silent. The iron gates stood open, though the caretaker swore nobody had entered or left since dusk, before the storm began. Inside, candles guttered along the corridor, illuminating wet footprints that ended beneath the portrait depicting the manor's founder, Sir Julian. At the footprints' end, Lord Bellamy lay smiling, a jeweled letter opener protruding neatly from his immaculate evening jacket front. His guests waited downstairs, drinking brandy beneath chandeliers, each claiming to have heard nothing except thunder and a single scream. Mara knelt beside the body and noticed mud beneath Bellamy's fingernails, as though he had clawed desperately at earth outside. Then the grandfather clock chimed midnight, and every candle went dark, leaving someone else breathing quietly within the corridor nearby.
created_at
"2026-07-09T18:04:12.106Z"
7/9/2026, 6:04:12 PM
model
"openai/gpt-5.6-terra-20260709"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
9557
moderation_latency
(null)
generation_time
10295
tokens_prompt
46
tokens_completion
248
native_tokens_prompt
41
native_tokens_completion
1337
native_tokens_completion_images
0
native_tokens_reasoning
1147
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
0.0201575
router
(null)
provider_responses
0
endpoint_id
"3cc89000-ae34-4dde-9c7d-5ce009c8af0b"
id
"resp_0b1ffb6603c73223016a4fe29c2f84819795d1d742ab3c0a1e"
is_byok
false
latency
420
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-1783620252-kLyEw8BsCZ69m7lLwZEf"
session_id
(null)
preset_id
(null)
api_type
"completions"
id
"gen-1783620252-8v1zXCLIGsKHQTDcbEuJ"
upstream_id
"resp_0b1ffb6603c73223016a4fe29c2f84819795d1d742ab3c0a1e"
total_cost
0.0201575
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
7
wordCounts
0
20
1
20
2
20
3
20
4
20
5
20
6
20