# AI Tierlist > AI Tierlist (aitierlist.xyz) is a bilingual (English/Korean) directory that ranks 241+ AI tools into S/A/B/C/D tiers across 20 categories, with per-tool reviews covering strengths, weaknesses, pricing, and recent changes. Rankings are re-evaluated continuously and updated weekly. Tiers mean: S = best in class, A = excellent, B = solid, C = situational, D = not recommended. Each tool page includes a written tier rationale, pros/cons, and pricing model (free / freemium / paid / enterprise). ## Tool Categories - [Academic Writing](https://www.aitierlist.xyz/en/category/academic-writing): AI tools for academic and research writing (7 tools ranked). S-tier: Grammarly. - [AI Search Engine](https://www.aitierlist.xyz/en/category/ai-search): AI-powered next-generation search engines and information discovery tools (12 tools ranked). S-tier: Perplexity AI. - [AI App Builder](https://www.aitierlist.xyz/en/category/app-builder): No-code/low-code tools for building apps and websites with AI (10 tools ranked). - [Chatbot & Conversation](https://www.aitierlist.xyz/en/category/chatbot): AI chatbots and conversational AI tools (24 tools ranked). S-tier: ChatGPT, Claude, Google Gemini. - [Coding & Development](https://www.aitierlist.xyz/en/category/coding): AI-powered coding assistants and development tools (23 tools ranked). S-tier: Claude Code, Mintlify. - [Copywriting](https://www.aitierlist.xyz/en/category/copywriting): AI tools for writing advertising and marketing copy (6 tools ranked). - [Creative Writing](https://www.aitierlist.xyz/en/category/creative-writing): AI tools for creative writing like novels and scripts (7 tools ranked). - [Design](https://www.aitierlist.xyz/en/category/design): AI design and creative tools (14 tools ranked). - [Grammar Correction](https://www.aitierlist.xyz/en/category/grammar): AI tools for grammar and spelling check (8 tools ranked). - [AI Image Editing](https://www.aitierlist.xyz/en/category/image-editing): AI-powered image editing, enhancement, and background removal tools (20 tools ranked). S-tier: PhotoRoom. - [Image Generation](https://www.aitierlist.xyz/en/category/image-generation): AI image generation and editing tools (11 tools ranked). - [Music Generation](https://www.aitierlist.xyz/en/category/music): AI music generation, composition, music production, background music, and other music-related AI tools (10 tools ranked). - [Paraphrasing](https://www.aitierlist.xyz/en/category/paraphrasing): AI tools for sentence rewriting and paraphrasing (6 tools ranked). - [Productivity](https://www.aitierlist.xyz/en/category/productivity): AI-powered productivity enhancement tools (9 tools ranked). - [Research & Analysis](https://www.aitierlist.xyz/en/category/research): AI-powered research and data analysis tools (14 tools ranked). - [SEO Content](https://www.aitierlist.xyz/en/category/seo): AI tools for SEO-optimized content writing (11 tools ranked). - [Summarization](https://www.aitierlist.xyz/en/category/summarization): AI tools for summarizing long documents (7 tools ranked). - [Translation](https://www.aitierlist.xyz/en/category/translation): AI translation and multilingual support tools (17 tools ranked). S-tier: Google Translate. - [Video Generation](https://www.aitierlist.xyz/en/category/video-generation): AI video generation and editing tools (13 tools ranked). S-tier: HeyGen. - [Voice & AI Voice](https://www.aitierlist.xyz/en/category/voice): TTS, voice cloning, AI voice, speech recognition, and other voice-related AI tools (12 tools ranked). S-tier: ElevenLabs. ## S-Tier Tool Reviews - [ChatGPT](https://www.aitierlist.xyz/en/category/chatbot/chatgpt) - [Claude](https://www.aitierlist.xyz/en/category/chatbot/claude) - [Claude Code](https://www.aitierlist.xyz/en/category/coding/claude-code) - [ElevenLabs](https://www.aitierlist.xyz/en/category/voice/elevenlabs) - [Google Gemini](https://www.aitierlist.xyz/en/category/chatbot/google-gemini) - [Google Translate](https://www.aitierlist.xyz/en/category/translation/google-translate) - [Grammarly](https://www.aitierlist.xyz/en/category/academic-writing/grammarly) - [HeyGen](https://www.aitierlist.xyz/en/category/video-generation/heygen) - [Mintlify](https://www.aitierlist.xyz/en/category/coding/mintlify) - [Perplexity AI](https://www.aitierlist.xyz/en/category/ai-search/perplexity-ai) - [PhotoRoom](https://www.aitierlist.xyz/en/category/image-editing/photoroom) ## LLM Model Rankings - [LLM model rankings](https://www.aitierlist.xyz/en/models): Weekly usage-based rankings of large language models (GPT, Claude, Gemini, and others) from OpenRouter data, overall and by task category, with pricing and context-window details. - [LLM API pricing comparison](https://www.aitierlist.xyz/en/models/pricing): Input/output cost per 1M tokens and context window for every tracked model, refreshed weekly. ## Comparison & Curation Pages - Tool comparisons live at https://www.aitierlist.xyz/en/compare/{tool-a}-vs-{tool-b} (e.g. head-to-head tier, pricing, strengths/weaknesses). - Model comparisons live at https://www.aitierlist.xyz/en/models/compare/{model-a}-vs-{model-b} (specs, pricing, per-task usage ranks). - Alternatives to any ranked tool live at https://www.aitierlist.xyz/en/alternatives/{tool} (same-category tools, tier-ranked). - Free-only tier lists live at https://www.aitierlist.xyz/en/best/free-{category} (free and freemium tools only). ## Blog - [Weekly AI tool updates](https://www.aitierlist.xyz/en/blog/weekly): Auto-curated weekly roundup of AI tool changes, new releases, and tier movements. ## Optional - [Korean version](https://www.aitierlist.xyz/ko): All pages are also available in Korean under the /ko path. - [Sitemap](https://www.aitierlist.xyz/sitemap.xml)