OpenPlex

An open-source Perplexity Pro alternative for your terminal.

OpenPlex gives you AI-powered answers grounded in real web results — with citations, source ranking, and a dual-pass RAG pipeline. No browser. No subscription. Runs on Termux and Linux with minimal dependencies.

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What's New

• Pass-through RAG (2-Step Verification): Deep research mode now uses a dual-pass system. First, it drafts an answer, then a separate verification pass checks every claim against the sources to eliminate hallucinations.
• Source Trust Engine: Heuristics-based scoring that prioritizes high-authority domains (Official docs, .gov, .edu) and detects primary sources.
• Animated Terminal UI: A new, polished interface with an animated ASCII logo and professional color palettes.
• Smart Orchestration: Unified intent detection and query resolution for faster, more accurate searches.

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Core Pipeline

OpenPlex works like Perplexity Pro, but natively in your terminal:

1. Orchestration: Analyzes your question to decide if it needs a search or just a chat response.
2. Multi-Source Search: Searches the web (DuckDuckGo) and fetches content from multiple pages in parallel.
3. Trust Ranking: Scores and ranks sources based on domain authority and content quality.
4. Drafting: Generates an initial answer with inline citations.
5. Verification (Deep Mode): Cross-references the draft against sources to ensure absolute accuracy.

Question → Intent → Search → Trust Rank → Draft → Verify → Final Answer

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Install

Termux (Android)

pkg install python git
git clone https://github.com/Alex72-py/openplex.git
cd openplex
pip install rich
python openplex.py

Linux

git clone https://github.com/Alex72-py/openplex.git
cd openplex
pip3 install rich
python3 openplex.py

On first run, a setup wizard walks you through choosing a provider and entering your API key.

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Providers & Models

All providers have free tiers — no paid subscription required.

NVIDIA NIM — build.nvidia.com

Key format: nvapi-... · Free tier available

Short Name	Model
deepseek-r1	DeepSeek R1 671B
llama-3.3-70b	Llama 3.3 70B
nemotron-super	Nemotron Ultra 253B
qwen-2.5-72b	Qwen 2.5 72B
mistral-small	Mistral Small 24B

Google AI Studio — aistudio.google.com

Key format: AIza... · 15 req/min free

Short Name	Model
gemini-2.5-flash	Gemini 2.5 Flash
gemini-2.0-flash	Gemini 2.0 Flash
gemini-2.0-flash-lite	Gemini 2.0 Flash Lite
gemini-2.5-pro	Gemini 2.5 Pro

OpenRouter — openrouter.ai

Key format: sk-or-... · Free models available

Short Name	Model
llama-3.3-70b-free	Llama 3.3 70B (free)
deepseek-r1-free	DeepSeek R1 (free)
deepseek-v3-free	DeepSeek V3 (free)
gemma-3-27b-free	Gemma 3 27B (free)
qwen3-235b-free	Qwen3 235B (free)
mistral-7b-free	Mistral 7B (free)

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Commands

/provider list              browse all search providers
/provider set <name>        switch active provider
/provider key <key>         update API credentials

/model list                 view models for current provider
/model set <name>           switch active model

/deep <question>            in-depth research mode (2-step verification)
/sources                    inspect sources from last answer
/clear                      reset conversation state
/config                     view current configuration
/status                     display session analytics
/help                       show this guide
/exit                       terminate OpenPlex

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Environment Variables

export OPENPLEX_NVIDIA_KEY="nvapi-..."
export OPENPLEX_GOOGLE_KEY="AIza..."
export OPENPLEX_OPENROUTER_KEY="sk-or-..."
export OPENPLEX_PROVIDER="google"
export OPENPLEX_MODEL="models/gemini-2.5-flash"

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Why OpenPlex?

Feature	Perplexity Pro	OpenPlex
Cost	$20/month	Free
Open Source	❌	✅
Verification Pass	✅	✅ (Deep Mode)
Trust Engine	✅	✅
Terminal Native	❌	✅
BYO Model	❌	✅

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License

MIT