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GPT-4.5 Codex

software 4 mentions from 4 sources Visit website →

An advanced version of OpenAI's Codex model with improved efficiency and speed.

ai coding openai model llm language model
4

sources

Mentioned by

Lex Fridman How I AI Alexander Bericos Morgan Linton

All mentions

How I AI uses this ✓ High confidence
"the new model GPT 5.3 Codex. Try saying that five times fast."
From: Claude Opus 4.6 vs GPT-5.3 Codex: How I shipped 93,000 lines of code in 5 days • ▶ 0:22 • Feb 2026

Attribution: Host uses this model extensively for testing and coding throughout the episode

Morgan Linton uses this ✓ High confidence
"GPT 5.3 Codex just came out. Morgan, help me understand by the end of this episode"
From: Claude Opus 4.6 vs GPT-5.3 Codex • ▶ 1:29 • Feb 2026

Attribution: Morgan is demonstrating and comparing this model throughout the episode

Lex Fridman mentioned ✓ High confidence
"Uses whatever AI model you like, including Claude Opus 4.6 and GPT 5.3 Codex"
From: OpenClaw: The Viral AI Agent that Broke the Internet - Peter Steinberger | Lex Fridman Podcast #491 • ▶ 2:48 • Feb 2026

Attribution: Host mentioning it as one of the AI models that can be used with OpenClaw

Alexander Bericos created this ✓ High confidence
"With GPT 4.5 Codex that model is like significantly more efficient than prior models."
From: OpenAI's Codex Lead: Why Coding as We Know It is Over • ▶ 15:24 • Feb 2026

Attribution: The guest discusses this as a model their team created and improved