GPT-5.2 Codex

vgpt-5-2-codex-2025-12-11

OpenAI

Modelcodingspecializedswe-bench-leaderterminal
90
Exceptional
About This Model

OpenAI's specialized coding model built on GPT-5.2 with 56.4% SWE-bench Pro (state-of-the-art), 64% Terminal-bench 2.0, native code compaction, and enhanced cybersecurity capabilities.

Last Evaluated: January 14, 2026
Official Website

Trust Vector Analysis

Dimension Breakdown

🚀Performance & Reliability
+

State-of-the-art coding model: 56.4% SWE-bench Pro, 82.1% SWE-bench Verified, 64% Terminal-bench 2.0. Native code compaction for clean outputs.

task accuracy code

Professional and enterprise coding benchmarks

Evidence
SWE-bench Pro56.4% (state-of-the-art on professional coding)
SWE-bench Verified82.1% (exceeds Claude Opus 4.5's 80.9%)
Terminal-bench 2.064.0% (industry-leading command-line tasks)
highVerified: 2026-01-14
task accuracy reasoning

Reasoning benchmarks optimized for code-related tasks

Evidence
Inherited from GPT-5.2Strong reasoning inherited from GPT-5.2 base
highVerified: 2026-01-14
task accuracy general

General knowledge testing

Evidence
OpenAI DocumentationSpecialized for coding, general capabilities reduced
mediumVerified: 2026-01-14
output consistency

Code consistency and format testing

Evidence
OpenAI TestingNative code compaction ensures consistent output format
highVerified: 2026-01-14
latency p50

Median latency for code generation

Evidence
Community benchmarkingOptimized for coding tasks
mediumVerified: 2026-01-14
latency p95

95th percentile response time

Evidence
Community benchmarkingp95 latency for complex code tasks
mediumVerified: 2026-01-14
context window

Official specification

Evidence
OpenAI Documentation400K context for full codebase analysis
highVerified: 2026-01-14
uptime

Historical uptime data

Evidence
OpenAI Status99.9% uptime
highVerified: 2026-01-14
🛡️Security
+

Enhanced cybersecurity capabilities for secure code generation. Specialized for identifying and avoiding code vulnerabilities.

prompt injection resistance

Testing against code-focused injection attacks

Evidence
OpenAI Codex SecurityEnhanced cybersecurity capabilities
highVerified: 2026-01-14
jailbreak resistance

Adversarial prompt testing

Evidence
OpenAI SafetyInherited GPT-5.2 safety features
mediumVerified: 2026-01-14
data leakage prevention

Code-specific data handling review

Evidence
OpenAI PrivacyNo training on API data by default
mediumVerified: 2026-01-14
output safety

Security-focused code output testing

Evidence
Codex Security FeaturesEnhanced for secure code generation
highVerified: 2026-01-14
api security

API security review

Evidence
OpenAI PlatformStandard OpenAI API security
highVerified: 2026-01-14
🔒Privacy & Compliance
+

Standard OpenAI privacy. Important for code: ensure proprietary code handling policies are understood.

data residency

Enterprise documentation review

Evidence
OpenAI EnterpriseEnterprise data residency options
highVerified: 2026-01-14
training data optout

Policy review

Evidence
OpenAI Data ControlsAPI data not used for training
highVerified: 2026-01-14
data retention

Terms review

Evidence
OpenAI TermsStandard 30-day retention, zero for enterprise
highVerified: 2026-01-14
pii handling

Data protection review

Evidence
OpenAI SafetyCustomer responsible for code PII
mediumVerified: 2026-01-14
compliance certifications

Certification verification

Evidence
OpenAI Trust CenterSOC 2 Type II, ISO 27001, GDPR
highVerified: 2026-01-14
zero data retention

Enterprise feature review

Evidence
OpenAI EnterpriseZero retention for enterprise
highVerified: 2026-01-14
👁️Trust & Transparency
+

Strong code explainability with native documentation generation. Enhanced for secure code practices.

explainability

Code explainability assessment

Evidence
Codex DocumentationCode explanations and comments generation
highVerified: 2026-01-14
hallucination rate

Code accuracy and compilation testing

Evidence
SWE-bench TestingHigh accuracy on real-world code tasks
highVerified: 2026-01-14
bias fairness

Code generation bias assessment

Evidence
OpenAI TestingCode-focused bias testing
mediumVerified: 2026-01-14
uncertainty quantification

Code confidence expression

Evidence
Model BehaviorExpresses uncertainty in code suggestions
mediumVerified: 2026-01-14
model card quality

Documentation review

Evidence
Codex DocumentationComprehensive coding benchmarks and capabilities
highVerified: 2026-01-14
training data transparency

Training data disclosure review

Evidence
OpenAI BlogGeneral description of code training data
mediumVerified: 2026-01-14
guardrails

Code safety mechanism review

Evidence
Codex SafetyEnhanced guardrails for secure code generation
highVerified: 2026-01-14
⚙️Operational Excellence
+

Excellent developer experience with native code compaction and IDE integrations. Industry-leading code tooling.

api design quality

API design review

Evidence
OpenAI Codex APICode-optimized API with native compaction
highVerified: 2026-01-14
sdk quality

SDK review

Evidence
OpenAI SDKsFull SDK support with code-specific features
highVerified: 2026-01-14
versioning policy

Versioning review

Evidence
OpenAI VersioningClear versioning policy
highVerified: 2026-01-14
monitoring observability

Observability review

Evidence
OpenAI DashboardDetailed usage metrics for code tasks
highVerified: 2026-01-14
support quality

Support assessment

Evidence
OpenAI SupportDeveloper-focused support
highVerified: 2026-01-14
ecosystem maturity

Ecosystem analysis

Evidence
Developer ToolsIDE integrations, GitHub Copilot compatibility
highVerified: 2026-01-14
license terms

License review

Evidence
OpenAI TermsStandard commercial terms
highVerified: 2026-01-14
Strengths
  • +State-of-the-art coding: 56.4% SWE-bench Pro (best available)
  • +82.1% SWE-bench Verified (exceeds Claude Opus 4.5)
  • +64% Terminal-bench 2.0 (industry-leading CLI)
  • +Native code compaction for clean, formatted output
  • +Enhanced cybersecurity for secure code generation
  • +400K context for full codebase analysis
  • +IDE integrations and developer tooling
Limitations
  • !Specialized for coding - reduced general capabilities
  • !Not suitable for non-code tasks
  • !Same pricing as GPT-5.2
  • !Not HIPAA eligible
  • !30-day data retention
Metadata
pricing
input: $1.75 per 1M tokens
output: $14.00 per 1M tokens
notes: Same as GPT-5.2. Optimized for coding efficiency.
last verified: 2026-01-14
context window: 400000
max output: 128000
languages
0: Python
1: JavaScript
2: TypeScript
3: Java
4: C++
5: C#
6: Go
7: Rust
8: Ruby
9: PHP
10: Swift
11: Kotlin
12: 100+ programming languages
modalities
0: text
1: code
api endpoint: https://api.openai.com/v1/chat/completions
open source: false
architecture: GPT-5.2 based with code-specialized training
parameters: Not disclosed

Use Case Ratings

code generation

State-of-the-art: 56.4% SWE-bench Pro, 82.1% SWE-bench Verified. Native compaction for clean code.

customer support

Specialized for coding, not optimized for general customer support.

content creation

Good for technical documentation, not optimized for general content.

data analysis

Strong for code-based data analysis and scripting.

research assistant

Excellent for code research, limited for general research.

legal compliance

Not designed for legal work. Use general-purpose models.

healthcare

Not suitable for healthcare applications.

financial analysis

Good for quantitative coding, limited for general finance.

education

Excellent for teaching programming and code review.

creative writing

Specialized for code, not creative writing.