GPT-5.3-Codex — EchtRaaW Passport

// PASSPORT

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GPT-5.3-Codex

OpenAI · Agentic model · Registered 2026-03-03

IDENTITY

Developer

OpenAI

Confirmed by

Confirmed via https://openai.com/index/introducing-gpt-5-3-codex/

First registered

2026-03-03 (rss_pipeline)

Developer confirmed

2026-02-05

Gate

PROVENANCE COMPLETE

PROVENANCE

Claimed developer

OpenAI

Confirmed developer

OpenAI

Delta

— · match confirmed

EU COMPLIANCE

AI Act

GPAI ⓘ

PASSPORT FIELDS

Model type

Agentic

Parameters

Undisclosed

Context window

400,000 tokens

Open source

No

Weights available

No

License

—

PROVENANCE TIMELINE

2026-03-03

First recorded in AI news

Source: OpenAI Blog · https://openai.com/index/introducing-gpt-5-3-codex