Generating a 3–7 word thread title uses fewer than 500 input tokens per new search—meaning you can run Auto-Rename for Perplexity completely free using Groq, Gemini, OpenRouter free models, local Ollama, or the built-in zero-key heuristic.
Auto-Rename for Perplexity works for $0/month in four ways: (1) Zero-key Offline Mode works immediately on install with no API key or network calls; (2) Groq (default openai/gpt-oss-20b) generates titles in ~150–250 ms on its free tier; (3) Google Gemini 2.5 Flash and OpenRouter :free models offer generous free API tiers; and (4) Ollama runs 100% locally on 127.0.0.1:11434.
Every provider adapter in Auto-Rename for Perplexity is tuned specifically for short title generation—including automatic fixes for 2026 reasoning models so thinking tokens never truncate your 3–7 word title:
| Provider | Default Model | Free / Local Option | Built-In Protocol Optimization |
|---|---|---|---|
| Offline Heuristic | Built-in heuristicTitle() |
100% Free & Offline (No Key) | Instant local noun-phrase extraction preserving acronyms & mixed-case identifiers; automatic fallback if an API call fails. |
| Groq (Default) | openai/gpt-oss-20b |
Free developer tier | Sends reasoning_effort: "low" + max_tokens: 256 for ultra-low latency (~200 ms) without empty reasoning truncation. |
| Google Gemini | gemini-2.5-flash |
Free tier in Google AI Studio | Sets thinkingBudget: 0 on 2.5 Flash and filters thought parts automatically. |
| OpenRouter | Any OpenRouter model ID | Supports *:free models |
Unified OpenAI-compatible gateway across hundreds of open and frontier models. |
| Ollama (Local) | llama3.2:3b / qwen2.5:3b |
100% Local on your machine | Calls http://127.0.0.1:11434 directly from your browser—zero cloud data leaves your computer. |
| OpenAI | gpt-4o-mini / gpt-5-mini |
Pay-as-you-go (~$0.01 per 100+ threads) | Uses max_completion_tokens: 256 for full compatibility with modern OpenAI models. |
| Anthropic | claude-haiku-4-5 |
Pay-as-you-go | Direct browser MV3 support from the isolated Service Worker with zero proxy server. |
| Mistral / DeepSeek / Sarvam / OpenCode Zen | mistral-small, deepseek-chat, sarvam-105b, Zen routing |
Provider free credits / PAYG | Dedicated adapters including multi-protocol routing for OpenCode Zen and dual header auth for Sarvam. |
console.groq.com/keys.P_ icon in Chrome, leave Provider on Groq and Model on openai/gpt-oss-20b.api.groq.com host permission prompt, and click TEST LLM.To run completely offline with a local neural model, start Ollama with Chrome extension origin access enabled so Chromium’s MV3 Service Worker is allowed to POST to localhost:
OLLAMA_ORIGINS="chrome-extension://*" ollama serveTired of Perplexity.ai using your raw prompt, stack trace, or truncated paragraph as the thread title? Fix Perplexity Library titles automatically in 60 seconds with Auto-Rename for Perplexity.
Turn a cluttered Perplexity.ai Library into a searchable knowledge base using automatic 3–7 word titles, custom project prefixes like [Research] or [Bug], and regex exclude rules.
Step-by-step unpacked installation guide for Auto-Rename for Perplexity across Google Chrome, Brave, Arc, Microsoft Edge, and Vivaldi—no Chrome Web Store account or Node.js required.
ChatGPT and Claude automatically summarize new chats into short 3–6 word titles, while Perplexity.ai keeps your raw prompt. Learn why—and how to add automatic AI thread titles to Perplexity.
Quick fixes if Perplexity threads aren't auto-renaming: grant optional host permissions, fix Ollama HTTP 403 CORS origins, understand reasoning-model token budgets, and check HTTP 204 status.
How to upgrade your daily Perplexity.ai research workflow in Chrome, Brave, Arc, and Edge with open-source Manifest V3 tooling, clean 3–7 word Library titles, and strict API key privacy.