{"event":{"id":"evt-hist-20260205-gpt53codex","dedupe_key":"agentic_model_product_release:2026-02-05:openai-launches-gpt-5-3-codex-for-paid-codex-users","event_type":"agentic_model_product_release","title":"OpenAI launches GPT-5.3-Codex for paid Codex users","summary":"On February 5, 2026 OpenAI announced GPT-5.3-Codex, an agentic coding model available to paid ChatGPT plans through Codex app, CLI, IDE and web. OpenAI said API availability was planned, not yet offered at launch. Separate earlier Codex desktop app (February 2) and later GPT-5.4 general model (March 5) are distinct milestones. Benchmarks and performance comparisons in launch material are provider-reported.","occurred_at":"2026-02-05T00:00:00.000Z","published_at":"2026-02-05T00:00:00.000Z","observed_at":"2026-10-17T14:29:00.000Z","reconstructed_at":"2026-10-17T14:29:00.000Z","ingest_type":"historical_backfill","locations":null,"status":"verified","confidence":0.97,"metadata":{"canonical_overlap_unresolved":1,"day_precision":1,"do_not_infer_independent_benchmark_replication":1,"evidence_only":1,"external_postcutoff_id":"2026-02-05-gpt-5-3-codex","milestone":"initial_model_product_release","new_relation_onset":0,"not_api_available_at_launch":1},"created_at":"2026-10-17T14:56:20.007Z","updated_at":"2026-10-17T14:56:20.007Z"},"artifacts":[{"id":"art-hist-20260205-gpt53codex","dedupe_key":"d0837dbf1a420d8262c70887866264ab17bcd72125cc516f3298d191ddace504","canonical_url":"https://openai.com/index/introducing-gpt-5-3-codex/","evidence_locator":"","artifact_type":"primary_model_announcement","title":"Introducing GPT-5.3-Codex","summary":"","creator_entities":[],"released_at":"2026-02-05T00:00:00.000Z","content_hash":null,"metadata":[],"created_at":"2026-10-17T14:56:20.006Z","updated_at":"2026-10-17T14:56:20.006Z","relation":"documented_by"}],"signals":[]}