OpenAI Codex CLI vs ChatPDF vs OpenCode vs GitHub Copilot 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
ChatPDF
Competitor 2
OpenCode
Competitor 3
GitHub Copilot 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 ChatPDF
chatpdf.com
ChatPDF is a document question-answering app: upload a PDF, ask questions in plain language, and get answers with built-in citations that point back to the source passage.
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.
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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
Traffic estimated monthly website traffic
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Pricing
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Paid
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
DocumentsTextWeb pages
CodeText
CodeText
Output
Code
Text
Code
Code
Skill level
Advanced
Beginner-friendly
Advanced
Intermediate
Categories
Development & CodeAI Coding Assistant
Education & LearningProductivity & OfficeResearch & AnalyticsWriting & Content+4 more
Development & CodeAI Coding Assistant
Development & CodeProductivity & OfficeAI AgentAI Coding Assistant
Tasks what each tool can do · 0 shared · core   partial
Tasks covered
4
12
6
5
Coding
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Agents
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Developer tools
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Interactive PDF processing
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PDF analysis
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PDFs
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Document summarization
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GitHub pull requests
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PDF summaries
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PDF translations
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Research
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Summarizing
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Academic research
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Development
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Document reading
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GitHub management
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Homework assistance
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Local AI
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Self hosted
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Summaries
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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.