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A curated and continuously updated list of the best AI chat platforms you can use for free — including usage limits, sign-up requirements, and what each tool is best at.
Perfect for:
Website: https://aistudio.google.com
Model: Gemini 3 Pro
Free Usage: 100 prompts per day
Sign-Up: Required (Google account)
Why it’s good
Best for: developers, power users, Gemini testing
Website: https://chat.z.ai
Model: GLM-4.7
Free Usage: Unlimited
Sign-Up: Not required
Why it’s good
Best for: unlimited free AI, quick writing, slides
Website: https://copilot.microsoft.com
Model: GPT-5.1
Free Usage: Unlimited (including Think Deeper + Voice)
Sign-Up: Required (Microsoft account)
Why it’s good
Best for: reasoning, voice, productivity
Website: https://chatgpt.com
Model: GPT-5.2
Free Usage: Limited (resets every few hours)
Sign-Up: Required
Why it’s good
Best for: general AI tasks, “one tool for everything”
Website: https://gemini.google.com
Models: Gemini 3 Pro (limited) + Gemini 3 Flash (unlimited)
Sign-Up: Required
Why it’s good
Best for: daily AI use, research, summaries
Website: https://chat.deepseek.com
Model: DeepSeek-V3.2
Free Usage: Unlimited
Sign-Up: Required
Why it’s good
Best for: coding, math, deep reasoning
Website: https://www.kimi.com
Model: Kimi K2 (Thinking)
Free Usage: High limits (can change)
Sign-Up: Required
Why it’s good
Best for: long PDFs, deep analysis, research
Website: https://chat.qwen.ai
Model: Qwen3-Max
Free Usage: Unlimited (can change)
Sign-Up: Required
Why it’s good
Best for: multimodal tasks, long context, open-model power
Website: https://claude.ai
Model: Claude 4.5 Sonnet
Free Usage: Session-based limits (resets periodically)
Sign-Up: Required (often supports Google login)
Why it’s good
Best for: writing, editing, structured analysis
Website: https://chat.mistral.ai
Model: Mistral Large 3
Free Usage: Limited free tier
Sign-Up: Required
Why it’s good
Best for: quick tasks, lightweight AI chat
Website: https://www.perplexity.ai
Models: Multiple (varies: GPT/Claude/etc.)
Free Usage: Unlimited quick searches + limited “Pro” searches
Sign-Up: Optional (recommended for history + uploads)
Why it’s good
Best for: research, citations, fact-finding
Website: https://meta.ai
Model: Llama 3
Free Usage: Unlimited (can vary)
Sign-Up: Optional
Why it’s good
Best for: casual daily assistant inside Meta apps
Website: https://playground.allenai.org
Model: OLMo-3 32B
Free Usage: Unlimited
Sign-Up: Not required
Why it’s good
Best for: students, researchers, open-model testing
Website: https://dashboard.cohere.com
Model: Command-A Reasoning
Free Usage: 1000 API calls per month (trial keys)
Sign-Up: Required
Why it’s good
Best for: developers, API experiments
Website: https://console.upstage.ai
Model: Solar Pro 2
Free Usage: Free preview/trial (may be time-limited)
Sign-Up: Required
Why it’s good
Best for: testing enterprise LLMs
Website: https://chat.publicai.co
Model: Apertus 70B
Free Usage: Free web chat (availability can change)
Sign-Up: Not required
Why it’s good
Best for: open LLM testing, research curiosity
