{"schema_version":"onlylabs.public_signal.v1","title":"OpenAI Writing: GPT-5.3-Codex System Card","description":"OpenAI writing signal with public source context, captured evidence pages, related signals, and data-business radar classification.","url":"https://onlylabs.fyi/signals/de8f5fea-798a-4519-8828-66bac69f817c","json_url":"https://onlylabs.fyi/signals/de8f5fea-798a-4519-8828-66bac69f817c/signal.json","generated_at":"2026-06-08T15:45:22.698+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/de8f5fea-798a-4519-8828-66bac69f817c","signal_json":"https://onlylabs.fyi/signals/de8f5fea-798a-4519-8828-66bac69f817c/signal.json","source":"https://openai.com/index/gpt-5-3-codex-system-card","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 GPT-5.3-Codex System Card. This talking signal gives public context for research themes, product direction, policy, or launch framing. High-signal details: New model system card from OpenAI · GPT-5.3-Codex System Card | OpenAI February 5, 2026 GPT‑5.3‑Codex System Card Read the System Card Share Introduction GPT‑5.3‑Codex is the most capable agentic coding.... 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/gpt-5-3-codex-system-card","source_host":"openai.com","occurred_at":"2026-02-05T00:00:00+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":"New model system card from OpenAI","source":"signal"},{"label":"Watch term","value":"Safety and alignment","source":"evidence"},{"label":"Watch term","value":"Agents and tool 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This talking signal gives public context for research themes, product direction, policy, or launch framing. 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This enables it to take on long-running tasks that involve research, tool use, and complex execution. Much like a colleague, you can steer and interact with GPT‑5.3‑Codex while it’s working, without losing context. Like other recent models, it is being treated as High capability on biology, and is being deployed with the corresponding suite of safeguards we use for other models in the GPT‑5 family. It does not reach High capability on AI self-improvement. This is the first launch we are treating as High capability in the Cybersecurity domain under our Preparedness Framework, activating the associated safeguards. We do not have definitive evidence that this model reaches our High threshold, but are taking a precautionary approach because we cannot rule out the possibility that it may be capable enough to reach the threshold. Our safeguards for high capability in cybersecurity..."},"evidence_pages":[{"url":"https://openai.com/index/gpt-5-3-codex-system-card","final_url":"https://openai.com/index/gpt-5-3-codex-system-card","title":"GPT-5.3-Codex System Card","http_status":200,"content_type":null,"capture_method":"exa","fetched_at":"2026-06-08T15:45:22.698+00:00","bytes":null,"raw_path":null,"content_hash":null,"excerpt_chars":1200,"truncated":true,"excerpt":"GPT-5.3-Codex System Card | OpenAI February 5, 2026 GPT‑5.3‑Codex System Card Read the System Card Share Introduction GPT‑5.3‑Codex is the most capable agentic coding model to date, combining the frontier coding performance of GPT‑5.2‑Codex with the reasoning and professional knowledge capabilities of GPT‑5.2. This enables it to take on long-running tasks that involve research, tool use, and complex execution. Much like a colleague, you can steer and interact with GPT‑5.3‑Codex while it’s working, without losing context. 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