OpenAI Codex CLI vs Augment Code vs Functionize vs Gemini CLI

Which one fits you in 2026? Traffic, pricing, input → output, tasks and community side by side.

Your tool
OpenAI Codex CLI
vs
Competitor 1
Augment Code
Competitor 2
Functionize
Competitor 3
Gemini CLI
Compare
4 tools · best value per row highlighted
Your tool OpenAI Codex CLI
developers.openai.com
OpenAI Codex CLI brings the Codex coding agent to the terminal and to scripts.
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Competitor Augment Code
augmentcode.com
Augment Code is an agentic software development company whose Cosmos platform runs software agents across the development lifecycle.
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Competitor Functionize
functionize.com
Functionize is an agentic quality platform whose Studio product builds, runs and maintains tests against your live application.
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Competitor Gemini CLI
github.com
It can query and edit large codebases, generate new apps from PDFs, images, or sketches using multimodal input, and debug problems when you describe them in plain language.
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Traffic estimated monthly website traffic
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Bounce rate lower is better
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Pricing
Model
Paid
Paid
Freemium
Free
Starting price
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$20per month
$20per month · free tier available
Free
Free tier
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Free trial
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API access
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Plans
GPT-6-Astra $10GPT-6.1-Sol $2GPT-6-Luna $0.10GPT-Live-1 $0.05/minute+1 more
Standard $20/moBusiness $100/moEnterprise Custom
Free FreeGrowth $20/moScale $100/moEnterprise Custom
Free (personal Google account) Free
Capabilities input → output
Input
CodeImagesText
CodeText
TextWeb pages
CodeDocumentsImagesText
Output
Code
Code
Data
Code
Skill level
Advanced
Advanced
Advanced
Advanced
Categories
Development & CodeAI Coding Assistant
Development & CodeProductivity & OfficeAI AgentAI Code Review+2 more
Development & CodeAI Testing
Development & CodeAI Coding Assistant
Tasks what each tool can do · 1 shared · core   partial
Tasks covered
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6
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Agents
Coding
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Testing
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Developer tools
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Code reviews
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Test automation
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Test creation
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Test generation
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Agent creation
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Code analysis
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Code testing
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Debugging
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Development
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Terminal
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Test cases
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Website testing
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Community on aitoolstime
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Traffic figures are third-party estimates for the tool's own domain; tools sharing a domain with a bigger product are not counted. Pricing is captured from each tool's site and may lag.