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GPT-5.3 Codex

openai-gpt-5-3-codex

fields

nameREQ
GPT-5.3 Codex
aiflashreport.com2026-05-04
vendorREQ
OpenAI
aiflashreport.com2026-05-04
released_at
2026-02-05
aiflashreport.com2026-05-04
modality
text, code
aiflashreport.com2026-05-04
access
closed
aiflashreport.com2026-05-04
context_window
400000
aiflashreport.com2026-05-04
parameters
—
benchmark_score
852 revisions
gist.github.com2026-05-06
benchmark_name
SWE-Bench Verified2 revisions
gist.github.com2026-05-06
announcement_url
https://openai.com/index/introducing-gpt-5-3-codex/
aiflashreport.com2026-05-04

history · 9 fields · 11 revisions

name1 revision
GPT-5.3 Codexcurrentaiflashreport.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
OpenAIcurrentaiflashreport.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
2026-02-05currentaiflashreport.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, codecurrentaiflashreport.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
closedcurrentaiflashreport.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
400000currentaiflashreport.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_score2 revisions
85currentgist.github.com · 2026-05-06
“GPT-5.3 Codex: 85.0% on SWE-bench Verified (May 1 snapshot, ranked #3)”
82.4supersededaiflashreport.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_name2 revisions
SWE-Bench Verifiedcurrentgist.github.com · 2026-05-06
“GPT-5.3 Codex: 85.0% on SWE-bench Verified (May 1 snapshot, ranked #3)”
SWE-Bench Verifiedsupersededaiflashreport.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/currentaiflashreport.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.”
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GPT-5.3 Codex — ai-models | Frames