{"passport":{"slug":"gpt-2","display_name":"GPT-2","model_type":"language","parameter_count":"124M / 355M / 774M / 1.5B (four variants; largest is 1.5B)","context_window":"1024 tokens","claimed_developer":"OpenAI","confirmed_developer":"OpenAI","developer_confirmed_at":"2019-02-01T00:00:00+00:00","developer_source":"Confirmed via https://github.com/openai/gpt-2","first_appeared_at":"2026-03-04T12:30:35.944906+00:00","first_appeared_on":"rss_pipeline","status":"confirmed","availability":null,"deployment_status":"not_deployed","availability_scope":null,"gate":3,"eu_ai_act":"GPAI","regulatory_status":{"eu_ai_act":"GPAI"},"open_source":true,"weights_available":true,"license":"Modified MIT License (OpenAI GPT-2 License)","provenance_chain":[],"parent_model":null,"model_family":null,"superseded_by":null,"supersedes":[],"recommended_replacement":null,"product_links":null},"events":[{"event_type":"first_appearance","event_date":"2026-03-04T12:30:35.944906+00:00","title":"First recorded in AI news","detail":"OpenAI has released a dataset of explanations and scores for every neuron in GPT-2, using GPT-4 to automatically write the explanations.","source_url":"https://openai.com/index/language-models-can-explain-neurons-in-language-models","source_name":"OpenAI Blog"}],"delta":{"days_unattributed":null,"claimed_developer":"OpenAI","confirmed_developer":"OpenAI","match":true}}