{"schema_version":"onlylabs.public_signal.v1","title":"OpenAI Writing: Addendum to o3 and o4-mini system card: Codex","description":"OpenAI writing signal with public source context, captured evidence pages, related signals, and data-business radar classification.","url":"https://onlylabs.fyi/signals/45ef7958-273a-404a-832a-d15cb39868f0","json_url":"https://onlylabs.fyi/signals/45ef7958-273a-404a-832a-d15cb39868f0/signal.json","generated_at":"2026-06-08T15:45:42.36+00:00","org":{"slug":"openai","name":"OpenAI","category":"frontier-lab","category_label":"Frontier lab","dossier_url":"https://onlylabs.fyi/labs/openai","dossier_json_url":"https://onlylabs.fyi/labs/openai/dossier.json"},"related_urls":{"signal":"https://onlylabs.fyi/signals/45ef7958-273a-404a-832a-d15cb39868f0","signal_json":"https://onlylabs.fyi/signals/45ef7958-273a-404a-832a-d15cb39868f0/signal.json","source":"https://openai.com/index/o3-o4-mini-codex-system-card-addendum","lab_dossier":"https://onlylabs.fyi/labs/openai","lab_dossier_json":"https://onlylabs.fyi/labs/openai/dossier.json","analysis":"https://onlylabs.fyi/analysis/openai","analysis_json":"https://onlylabs.fyi/analysis/openai/analysis.json","analysis_evidence_json":"https://onlylabs.fyi/analysis/openai/evidence.json","category":"https://onlylabs.fyi/frontier","category_json":"https://onlylabs.fyi/frontier.json","category_feed":"https://onlylabs.fyi/frontier/feed.xml","category_signals_json":"https://onlylabs.fyi/signals.json","topic":"https://onlylabs.fyi/topics/talking","topic_signals_json":"https://onlylabs.fyi/topics/talking/signals.json","topic_feed":"https://onlylabs.fyi/topics/talking/feed.xml","data_business":null},"answer_pack":{"answer":"OpenAI published Addendum to o3 and o4-mini system card: Codex. 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High-signal details: Routine system card update, not a release · Addendum to o3 and o4-mini system card: Codex | OpenAI May 16, 2025 Addendum to OpenAI o3 and o4-mini system card: Codex Read the System Card Share Codex is a.... onlylabs links this event to 1 captured evidence page and 6 related writing signals.","signal_desk":"talking","source_context":{"source_url":"https://openai.com/index/o3-o4-mini-codex-system-card-addendum","source_host":"openai.com","occurred_at":"2025-05-16T08:00:00+00:00","first_seen_at":"2026-06-05T05:42:57.832854+00:00","date_source":"rss.item_date","context":null},"context_markers":[{"label":"Lab","value":"OpenAI","source":"signal"},{"label":"Signal desk","value":"talking","source":"signal"},{"label":"Source host","value":"openai.com","source":"source"},{"label":"Notability","value":"Routine system card update, not a release","source":"signal"},{"label":"Watch term","value":"RL environments","source":"evidence"},{"label":"Watch 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