GPT-5.3 Codex

openai-gpt-5-3-codex

fields

nameREQ	GPT-5.3 Codex	aiflashreport.com	2026-05-04
vendorREQ	OpenAI	aiflashreport.com	2026-05-04
released_at	2026-02-05	aiflashreport.com	2026-05-04
modality	text, code	aiflashreport.com	2026-05-04
access	closed	aiflashreport.com	2026-05-04
context_window	400000	aiflashreport.com	2026-05-04
parameters
benchmark_score	82.4	aiflashreport.com	2026-05-04
benchmark_name	SWE-Bench Verified	aiflashreport.com	2026-05-04
announcement_url	https://openai.com/index/introducing-gpt-5-3-codex/	aiflashreport.com	2026-05-04

history · 9 fields · 9 revisions

name1 revision

GPT-5.3 Codex current aiflashreport.com · 2026-05-04

GPT-5.3 Codex released 2026-02-05. Coding-specialized variant of GPT-5.3, tuned for agentic IDE workflows. ~200B MoE, 400K context, 82.4% SWE-bench Verified.

vendor1 revision

OpenAI current aiflashreport.com · 2026-05-04

GPT-5.3 Codex released 2026-02-05. Coding-specialized variant of GPT-5.3, tuned for agentic IDE workflows. ~200B MoE, 400K context, 82.4% SWE-bench Verified.

released_at1 revision

2026-02-05 current aiflashreport.com · 2026-05-04

GPT-5.3 Codex released 2026-02-05. Coding-specialized variant of GPT-5.3, tuned for agentic IDE workflows. ~200B MoE, 400K context, 82.4% SWE-bench Verified.

modality1 revision

text, code current aiflashreport.com · 2026-05-04

GPT-5.3 Codex released 2026-02-05. Coding-specialized variant of GPT-5.3, tuned for agentic IDE workflows. ~200B MoE, 400K context, 82.4% SWE-bench Verified.

access1 revision

closed current aiflashreport.com · 2026-05-04

GPT-5.3 Codex released 2026-02-05. Coding-specialized variant of GPT-5.3, tuned for agentic IDE workflows. ~200B MoE, 400K context, 82.4% SWE-bench Verified.

context_window1 revision

400000 current aiflashreport.com · 2026-05-04

GPT-5.3 Codex released 2026-02-05. Coding-specialized variant of GPT-5.3, tuned for agentic IDE workflows. ~200B MoE, 400K context, 82.4% SWE-bench Verified.

benchmark_score1 revision

82.4 current aiflashreport.com · 2026-05-04

GPT-5.3 Codex released 2026-02-05. Coding-specialized variant of GPT-5.3, tuned for agentic IDE workflows. ~200B MoE, 400K context, 82.4% SWE-bench Verified.

benchmark_name1 revision

SWE-Bench Verified current aiflashreport.com · 2026-05-04

GPT-5.3 Codex released 2026-02-05. Coding-specialized variant of GPT-5.3, tuned for agentic IDE workflows. ~200B MoE, 400K context, 82.4% SWE-bench Verified.

announcement_url1 revision

https://openai.com/index/introducing-gpt-5-3-codex/ current aiflashreport.com · 2026-05-04

GPT-5.3 Codex released 2026-02-05. Coding-specialized variant of GPT-5.3, tuned for agentic IDE workflows. ~200B MoE, 400K context, 82.4% SWE-bench Verified.