GPT-5.3-Codex
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Overview
Coding/agentic specialist positioned against Claude Opus 4.6; ~25% faster than Opus 4.6 per OpenAI. First OpenAI model "instrumental in creating itself." Codex-Spark mini variant Feb 12.
Details
- Vendor
- OpenAI
- Type
- Code LLM
- Release year
- 2026
- Jurisdiction
- USA
- CEO
- Sam Altman
- Key staffers
- Greg Brockman (President), Jakub Pachocki (Chief Scientist), Brad Lightcap (COO), Fidji Simo (CEO Applications), Sarah Friar (CFO), Mark Chen (SVP Research), Denise Dresser (CRO)
- Deployment
- Cloud only (proprietary)
- Open source
- No
- Free tier
- No
- Subscription
- ChatGPT Pro $200/mo at launch; Codex app
- Stock status
- Private (~$852B valuation, Mar 2026)
- X
- @OpenAI
Capabilities
App
AIDb Rating
AIDb v2.0 (curated): Capability 8.5/10 · Currency 8/10 · Access 4/10 · Significance 5/10 → 7.20
Safety notes
None widely reported
Last verified 2026-06-11
Cite this
“GPT-5.3-Codex.” AIDb — The AI Database. Verified 2026-06-11. https://theaidatabase.com/m/openai-gpt-5-3-codex.html
More from OpenAI
ChatGPT · ChatGPT Canvas · CLIP · CLIP (ViT B/32) · CLIP (ViT L/14) · Codex (original)