Head-to-Head Comparison

OpenAI Codex vs Semgrep

A detailed head-to-head comparison of OpenAI Codex (OpenAI) and Semgrep (Semgrep) across 34 scored criteria.

👁 8 views 📅 First compared Sep 21, 2026 📊 33 of 34 criteria comparable 🕓 Scores reviewed Apr 2026

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Different tool categories OpenAI Codex is categorised as Coding while Semgrep is categorised as Code Tools. These tools serve different primary use cases — scores for criteria outside their category may be zero or estimated.

🏆 Winner

💻

OpenAI Codex

OpenAI

Autonomous coding agent by OpenAI — built into ChatGPT, beats rivals on OSWorld GUI tasks

Included in ChatGPT Plus ($20/mo)Free tierAPIAgents

Intelligence

9.2

Coding

9.3

Creativity

8.5

Usability

9.0

Pricing

8.4

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Semgrep

Fast, customizable static analysis

Free (OSS)Free tierOpen SourceAPI

Intelligence

7.8

Coding

7.5

Creativity

1.8

Usability

5.9

Pricing

8.1

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📝 Text ✓ ✗

🖼️ Image ✓ ✗

🎤 Voice ✗ ✗

🎬 Video ✗ ✗

💻 Code ✓ ✓

🤖 Agents ✓ ✗

🔌 API ✓ ✓

🆓 Free ✓ ✓

📖 Open Source ✗ ✓

Criterion

OpenAI Codex

Semgrep

🧠 Core Intelligence

9.2 7.8

Overall IntelligenceComposite AI intelligence rating

9.2

◀

7.0

Reasoning AbilityLogical / chain-of-thought

9.5

◀

7.5

Factual AccuracyCorrectness on knowledge queries

9.3

◀

8.5

Context HandlingLong-context / big document handling

9.0

◀

7.0

Instruction FollowingComplex prompt adherence

9.2

◀

8.5

Hallucination ResistanceHigher = less hallucination

8.8

◀

8.0

💻 Technical & Coding

9.3 7.5

Coding (General)Broad software development tasks

9.5

◀

8.0

Debugging SkillFinding & fixing bugs

9.5

◀

7.5

Code ExplanationExplaining code in plain English

9.3

◀

7.0

Multi-language SupportPython, JS, C#, Go, Rust…

9.2

◀

8.5

System DesignArchitecture & scalability

9.0

◀

6.5

API / IntegrationREST, GraphQL, SDK knowledge

9.3

◀

7.5

🎨 Creativity & Content

8.5 1.8

CreativityOriginality and novel ideas

8.5

◀

2.0

Writing QualityBlogs, articles, long-form

8.8

◀

2.0

Marketing CopyAds, headlines, hooks

8.5

◀

1.5

StorytellingNarrative & fiction

8.0

◀

1.0

Image GenerationNULL if not supported

8.5

— (N/A)

Design UnderstandingUI/UX suggestions

8.5

◀

2.5

🧑‍💼 Practical Use Cases

8.8 5.1

Business UseReports, strategy, analysis

9.0

◀

6.0

SEO ContentSearch-optimised writing

8.0

◀

1.5

Research & SummarizationCondensing complex info

8.8

◀

5.5

Productivity AutomationTask & workflow automation

9.2

◀

7.5

Agent CapabilityAutonomous multi-step workflows

9.2

◀

5.0

⚡ Performance & Usability

9.0 5.9

SpeedResponse latency

9.0

Ease of UseUX and onboarding

9.5

◀

7.5

CustomizationPrompts, tools, plugins

9.0

Memory / PersonalizationCross-session memory

8.8

◀

2.0

Multimodal SupportText, image, voice, video

8.8

◀

2.0

🔒 Reliability & Ecosystem

9.4 8.5

Reliability / StabilityUptime and consistent output

9.3

◀

8.5

EcosystemPlugins, API, integrations

9.5

◀

8.5

💰 Pricing & Enterprise

8.4 8.1

Pricing ValueValue for money

8.0

▶

9.0

API PricingCost per token / call

7.5

▶

8.5

Enterprise ReadinessSSO, SLA, admin controls

9.2

◀

7.5

Privacy & SecurityData handling & compliance

9.0

◀

7.5

Feature Support

Feature	OpenAI Codex	Semgrep
Text generation	✓	✗
Image generation	✓	✗
Voice / audio	✗	✗
Video	✗	✗
Code assistance	✓	✓
Agent / autonomy	✓	✗
Public API	✓	✓
Free tier	✓	✓
Open source	✗	✓

⚖️

Our Verdict

OpenAI Codex leads on overall intelligence (9.2 vs 7.0). OpenAI Codex is the stronger pick for coding (9.5 vs 8.0). OpenAI Codex is ahead on writing quality (8.8 vs 2.0). Semgrep offers more for the money (9.0 vs 8.0).

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OpenAI Codex vs Semgrep

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