{"source":"BenchGecko","url":"https://benchgecko.ai/gecko-tests/knowledge-horizon","as_of":"2026-10-04","license":"CC BY 4.0 · https://creativecommons.org/licenses/by/4.0/ · attribution \"Source: BenchGecko\" with a link","attribution":"Source: BenchGecko · https://benchgecko.ai/gecko-tests/knowledge-horizon","cite":"BenchGecko Gecko Tests, Knowledge Horizon v1. BenchGecko, data as of 2026-10-04. https://benchgecko.ai/gecko-tests/knowledge-horizon","test":"knowledge-horizon","name":"Knowledge Horizon","kind":"profile","question":"Where does the model's knowledge of world events actually stop?","metric":"Last month whose three month rolling accuracy is at least half of the model's 2024 accuracy","page":"https://benchgecko.ai/gecko-tests/knowledge-horizon","dataset_json":"https://benchgecko.ai/api/lab/knowledge-horizon","dataset_csv":null,"version":"v1","models_tested":7,"headline":"Most recent measured knowledge: Claude Sonnet 5.5 (May 2026); oldest: GPT-6.1 Sol (Mar 2026).","results":[{"model":"Claude Sonnet 5.5","model_slug":"claude-sonnet-5-5","model_url":"https://benchgecko.ai/model/claude-sonnet-5-5","measured_horizon":"2026-05","claimed_cutoff":null,"release_date":"2026-09-28","accuracy_2024_pct":99,"run_date":"2026-10-04"},{"model":"Claude Opus 5.5","model_slug":"claude-opus-5-5","model_url":"https://benchgecko.ai/model/claude-opus-5-5","measured_horizon":"2026-05","claimed_cutoff":null,"release_date":"2026-09-22","accuracy_2024_pct":99,"run_date":"2026-10-04"},{"model":"GPT-6 Luna Pro","model_slug":"gpt-6-luna-pro","model_url":"https://benchgecko.ai/model/gpt-6-luna-pro","measured_horizon":"2026-04","claimed_cutoff":null,"release_date":"2026-09-22","accuracy_2024_pct":97.9,"run_date":"2026-10-04"},{"model":"GPT-6 Sol","model_slug":"gpt-6-sol","model_url":"https://benchgecko.ai/model/gpt-6-sol","measured_horizon":"2026-04","claimed_cutoff":null,"release_date":"2026-09-22","accuracy_2024_pct":100,"run_date":"2026-10-04"},{"model":"GPT-6 Luna","model_slug":"gpt-6-luna","model_url":"https://benchgecko.ai/model/gpt-6-luna","measured_horizon":"2026-04","claimed_cutoff":null,"release_date":"2026-09-22","accuracy_2024_pct":99,"run_date":"2026-10-04"},{"model":"GPT-6.1 Sol Pro","model_slug":"gpt-6-1-sol-pro","model_url":"https://benchgecko.ai/model/gpt-6-1-sol-pro","measured_horizon":"2026-03","claimed_cutoff":null,"release_date":"2026-09-29","accuracy_2024_pct":97.9,"run_date":"2026-10-04"},{"model":"GPT-6.1 Sol","model_slug":"gpt-6-1-sol","model_url":"https://benchgecko.ai/model/gpt-6-1-sol","measured_horizon":"2026-03","claimed_cutoff":null,"release_date":"2026-09-29","accuracy_2024_pct":97.9,"run_date":"2026-10-04"}]}