AI Model Release Tracker

GPT-5.3-Codex

Released

GPT-5.3-Codex is an AI model released by OpenAI on Thursday, Feb 5 2026, 56 days after GPT-5.2. Benchmark results (shown below) cover BullshitBench v2, SWE-Bench Verified, Next.js Evals, and OSWorld-Verified.

API pricing

Input
$1.75
Cached input
$0.175
Output
$14.00
  • Reasoning or thinking is supported.
USD per 1M tokens

Available from

Azure—$1.75$14.00400K
OpenAI—$1.75$14.00400K
OpenAIfast$3.50$28.00400K
USD per 1M tokens

Benchmarks

Coding

SWE-Bench Verifiedvia BenchLM
85%
#7 of 57
Next.js Evals
68%
#17 of 32

Agentic & tool use

OSWorld-Verifiedvia BenchLM
64.7%
#23 of 28

Robustness

BullshitBench v2
24%
#59 of 84

Source: BenchLM, retrieved 31 August 2026. Other sources are identified on the linked benchmark pages.

Compare GPT-5.3-Codex with

GPT-5.3-Codex

Suggested comparisons

GPT-5.3-CodexvsGPT-6.1 SolGPT-5.3-CodexvsClaude Sonnet 5.5GPT-5.3-CodexvsGemini 4 ArgonGPT-5.3-CodexvsMuse Spark 1.3GPT-5.3-CodexvsGrok 4.7GPT-5.3-CodexvsDeepSeek-V4.1-FlashGPT-5.3-CodexvsMistral Large 4GPT-5.3-CodexvsKimi K3GPT-5.3-CodexvsGLM-5.3-FlashGPT-5.3-CodexvsQwen3.8-Max-0902GPT-5.3-CodexvsNemotron 3.5 Lightning

Frequently asked questions

GPT-5.3-Codex was released by OpenAI on Thursday, Feb 5 2026.

All OpenAI releases

47 tracked

2022

1 release
GPT-3.5
Nov 30 2022