OpenAI Codex CLI vs GitHub Copilot CLI vs OpenCode vs Synthflow

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

Your tool
OpenAI Codex CLI
vs
Competitor 1
GitHub Copilot CLI
Competitor 2
OpenCode
Competitor 3
Synthflow
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.
Remove
Competitor GitHub Copilot CLI
github.com
It reads, writes and runs code, works directly with your issues and pull requests, and carries a task from planning to merged code.
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 Synthflow
synthflow.ai
Synthflow is an enterprise voice AI platform for automating phone calls with AI agents.
Make main Remove
Traffic estimated monthly website traffic
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Bounce rate lower is better
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Pricing
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Paid
Free
Free
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Starting price
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Free
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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
CodeText
CodeText
AudioText
Output
Code
Code
Code
AppsAudio
Skill level
Advanced
Intermediate
Advanced
Intermediate
Categories
Development & CodeAI Coding Assistant
Development & CodeProductivity & OfficeAI AgentAI Coding Assistant
Development & CodeAI Coding Assistant
Business & MarketingAI Call CenterAI Customer Service
Tasks what each tool can do · 0 shared · core   partial
Tasks covered
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11
Coding
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Agents
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Developer tools
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Call center automation
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Voice agents
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Agent creation
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Call agents
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Call answering
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Calls
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Customer calls
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GitHub pull requests
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Agent testing
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Call analysis
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Customer support
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Customer support automation
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Development
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GitHub management
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Local AI
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Self hosted
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Terminal
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Community on aitoolstime
Rating
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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.