GPT-5.3 Codex (xhigh)
OpenAIGPTProprietary
Description
GPT-5.3-Codex is OpenAI's most capable coding model, combining frontier agentic coding capabilities, improvements in aesthetics, and context compaction. It sets new state-of-the-art results on Terminal-Bench 2.0 (77.3%), OSWorld-Verified (64.7%), and SWE-Lancer IC Diamond (81.4%). First model classified as High capability for cybersecurity under OpenAI's Preparedness Framework. Available in the Codex app and API.
Release Date
2026-02-05
Parameters
—
Context Length
400K
Modalities
image, pdf, text
Capability Radar
43
general
53
coding
92
reasoning
68
scienceest.
80
agents
85
multimodal
Science uses a reasoning proxy when dedicated science benchmarks are unavailable.
Rankings
| Domain | #Rank | Score | Source |
|---|---|---|---|
| Agentic Capability | 17 | 67.0 | LS |
| Code Ranking | 9 | 91.0 | AA |
| General Ranking | 18 | 81.0 | AA |
| Science | 12 | 86.0 | AA |
Benchmark Scores (LLM Stats)
Agents
Terminal-Bench 2.0
77.3%SR
OSWorld-Verified
64.7%SR
SWE-Bench Pro
56.8%SR
Code
SWE-Lancer (IC-Diamond subset)
81.4%SR
General
LiveBench
72.8%SR
Safety
Cybersecurity CTFs
77.6%SR
AA Evaluation Indices
Intelligence Index44.3
Gpqa0.9
Tau20.9
Ifbench0.8
Lcr0.7
Scicode0.5
Terminalbench Hard0.5
Hle0.4
LLM Stats Category Scores
Safety80
Tool Calling80
Math70
Reasoning70
General70
Agents70
Code70
Multimodal60
Vision60
Pricing
Input Price$1.75 / 1M tokens
Output Price$14 / 1M tokens
Blended Price (3:1)$4.813 / 1M tokens
Cache Read Price$0.175 / 1M tokens
Speed
Tokens/sec107.4
Time to First Token72.53s
Time to Answer72.53s
Provider Price Ranking
Provider Price Ranking
22 providers
Cheapest: OpenAIMost Expensive: Venice AI
ProviderInputOutput
1OpenAICheapest
$0
$0.00001
2NanoGPT
$1.75
$14
3Abacus
$1.75
$14
4OpenRouter
$1.75
$14
5ZenMux
$1.75
$14
6Vivgrid
$1.75
$14
7Kilo Gateway
$1.75
$14
8Cloudflare AI Gateway
$1.75
$14
9GitHub Copilot
$1.75
$14
10OpenCode Zen
$1.75
$14
11FrogBot
$1.75
$14
12AIHubMix
$1.75
$14
13Azure Cognitive Services
$1.75
$14
14Requesty
$1.75
$14
15DigitalOcean
$1.75
$14
16Vercel AI Gateway
$1.75
$14
17LLM Gateway
$1.75
$14
18Azure
$1.75
$14
19FastRouter
$1.75
$14
20OrcaRouter
$1.75
$14
21FreeModel
$1.75
$14
22Venice AI
$2.19
$17.5
Compare pricing across different API providers for this model.