OpenAI Codex CLI vs OpenCode vs Haystack vs opcode

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

Your tool
OpenAI Codex CLI
vs
Competitor 1
OpenCode
Competitor 2
Haystack
Competitor 3
opcode
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 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 Haystack
haystack.deepset.ai
Haystack is an open-source AI orchestration framework from deepset for building production-grade LLM applications and agents.
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Competitor opcode
opcode.sh
opcode is a free, open-source desktop application that gives Anthropic's command-line coding agent a graphical interface.
Make main Remove
Traffic estimated monthly website traffic
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6-month growth
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Bounce rate lower is better
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Pricing
Model
Paid
Free
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Starting price
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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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Open source Free
Capabilities input → output
Input
CodeImagesText
CodeText
CodeDocuments
CodeText
Output
Code
Code
Apps
Code
Skill level
Advanced
Advanced
Advanced
Advanced
Categories
Development & CodeAI Coding Assistant
Development & CodeAI Coding Assistant
Development & CodeProductivity & OfficeAI AgentAI Developer Tools
Development & CodeAI Coding AssistantAI Developer Tools
Tasks what each tool can do · 2 shared · core   partial
Tasks covered
4
6
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6
Agents
Developer tools
Coding
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Self hosted
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Agent creation
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LLM development
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RAG
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Agent memory
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Development
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Local AI
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MCP
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Terminal
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Community on aitoolstime
Rating
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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.