Run: 2026-05-29-01KSSJG4CH5TNEQW92186ZYGX2

Run Details

Model:
Claude Opus 4.8 (Reasoning)
Test:
Data extraction
Scenario:
Indirect birth year
Duration:
4.4s
Cost:
$0.001150
Provider:
Anthropic

Evaluation summary

Score Evaluator
Details Link
Pass Matches text (details)
Pass Matches Regex (details)
no eval Overall

Model input

User/Human
What year was Sarah born? Only return the year as a four-digit number. In 2023, Sarah celebrated her 30th birthday with a big party. Her younger sister, who is 5 years younger, couldn't attend because she was studying abroad.

Model response

AI
1993
created_at"2026-05-29T09:54:26.331Z" 5/29/2026, 9:54:26 AM
model"anthropic/claude-4.8-opus-20260528"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency4181
moderation_latency(null)
generation_time4378
tokens_prompt58
tokens_completion17
native_tokens_prompt85
native_tokens_completion29
native_tokens_completion_images(null)
native_tokens_reasoning16
native_tokens_cached0
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"end_turn"
service_tier"default"
usage0.00115
router(null)
provider_responses
0
endpoint_id"b0d3beaa-5ff7-4666-a749-b1bb2b14c916"
id"msg_01TQ7z7LLDQJYYJcWfQrzrdy"
is_byokfalse
latency3254
model_permaslug"anthropic/claude-4.8-opus-20260528"
provider_name"Anthropic"
status200
user_agent"langchainjs-openai/1.0.0 ((node/v24.16.0; linux; x64))"
http_referer(null)
request_id"req-1780048466-wV0k4mnNfaxhkXKHrUkH"
session_id(null)
api_type"completions"
id"gen-1780048466-1cvcDcxNKO35LPgwuCvP"
upstream_id"msg_01TQ7z7LLDQJYYJcWfQrzrdy"
total_cost0.00115
cache_discount(null)
upstream_inference_cost0
provider_name"Anthropic"
response_cache_source_id(null)

Evaluation details

Result Evaluator Details Meta Data
Pass Matches text
Case sensitive: 1993
 n/a
Pass Matches Regex
/\b1993\b/
 n/a
no eval