OpenAI Codex CLI vs Knowledge Plane vs OpenCode vs Google Antigravity

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

Your tool
OpenAI Codex CLI
vs
Competitor 1
Knowledge Plane
Competitor 2
OpenCode
Competitor 3
Google Antigravity
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 Knowledge Plane
knowledgeplane.io
Engineering teams watch their AI tools hallucinate outdated project details
Make main Remove
Competitor OpenCode
opencode.ai
OpenCode is an open-source AI coding agent that helps developers write code in the terminal, an IDE or a desktop app.
Make main Remove
Competitor Google Antigravity
antigravity.google
Google Antigravity assumes you already think in agent-driven workflows
Make main Remove
Traffic estimated monthly website traffic
Monthly visits
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14Mvisits/mo
MoM change
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▼ 3.1%
6-month growth
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-31.9%
Global rank web
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Avg. last 3 months
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15.4M
Bounce rate lower is better
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0%
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48%
Pages / visit
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2.2
Visit duration
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3m 35s
Traffic sources
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● Direct 58% · ● Referral 42%
OpenAI Codex CLIKnowledge PlaneOpenCodeGoogle Antigravity
05.4M10.8M16.2M21.6MGoogle Antigravity · 12.1MGoogle Antigravity · 15.1MGoogle Antigravity · 15.9MGoogle Antigravity · 21.6MGoogle Antigravity · 20.5MGoogle Antigravity · 16.4MGoogle Antigravity · 21.5MGoogle Antigravity · 17.9MGoogle Antigravity · 14.4MGoogle Antigravity · 14M10M100MGoogle Antigravity · 12.1MGoogle Antigravity · 15.1MGoogle Antigravity · 15.9MGoogle Antigravity · 21.6MGoogle Antigravity · 20.5MGoogle Antigravity · 16.4MGoogle Antigravity · 21.5MGoogle Antigravity · 17.9MGoogle Antigravity · 14.4MGoogle Antigravity · 14MNov '25DecJan '26FebMarAprMayJunJulAug
Pricing
Model
Paid
Freemium
Free
Free
Starting price
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$19per month · free tier available
Free
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
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Capabilities input → output
Input
CodeImagesText
CodeDocumentsText
CodeText
CodeText
Output
Code
Text
Code
AppsCode
Skill level
Advanced
Intermediate
Advanced
Advanced
Categories
Development & CodeAI Coding Assistant
Education & LearningAI Knowledge Management
Development & CodeAI Coding Assistant
Development & CodeProductivity & OfficeAI AgentAI Coding Assistant
Tasks what each tool can do · 1 shared · core   partial
Tasks covered
4
12
6
9
Developer tools
Coding
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Agents
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Development
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Terminal
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Knowledge bases
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Knowledge graphs
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Agent creation
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Agent management
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Agent memory
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Code autocompletion
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Knowledge
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Knowledge maps
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Knowledge sourcing
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Code documentation
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Codebase q a
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Digital information management
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Frontend development
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Knowledge exchange
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Local AI
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Self hosted
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Slack
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Community on aitoolstime
Rating
no ratings yet
no ratings yet
no ratings yet
no ratings yet
Upvotes
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Saves
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Reviews
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Prompts
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Verified listing
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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.