Free AI platform comparison

ChatGPT (OpenAI) vs Perplexity AI: Complete Comparison

ChatGPT (OpenAI) 和 Perplexity AI 深度对比：免费额度、API 价格、模型能力、中国大陆可用性，帮你选最合适的 AI 工具

Quick decision

ChatGPT (OpenAI) vs Perplexity AI: Complete Comparison: pricing, free API, and limits

Quick answer: choose ChatGPT (OpenAI) if its free tier, model family, or ecosystem fits your app better; choose Perplexity AI if it gives better free API credits, pricing, or access for your workflow. This comparison focuses on free tier, API pricing, limits, setup, and practical alternatives.

Free tierChatGPT (OpenAI): Limited requests/day · Perplexity AI: No limit (basic search)

Free APINo vs No

Best checkCredits, rate limits, setup friction

DecisionTest both if rank, latency, or access matters

ChatGPT (OpenAI) detailsFree tier, API credits, limits and setup Perplexity AI detailsFree tier, API credits, limits and setup Free AI API directoryCompare all free credits and limits

👑

ChatGPT (OpenAI)

55pts

1 wins

Perplexity AI

40pts

0 wins

🏆 Overall, ChatGPT (OpenAI) offers more free value (1/6 categories)

📊 Side-by-Side

🧠 Model Details

ChatGPT (OpenAI)6 models

GPT-5.5

📐 1000k⚡ Plus/Pro only

Released April 2026, smartest model, major upgrade for coding/research/analysis. API $5/M input, $30/M output

GPT-5.5-Cyber

📐 1000k⚡ Trusted Access / enterprise-limited

GPT-5.5 variant for trusted-access cybersecurity use cases, including security evaluation, vulnerability analysis, and defensive workflows; availability is gated through OpenAI trusted access.

GPT-5.5 Pro

📐 1050k⚡ Pro only

Deep reasoning variant for complex high-stakes tasks. API $30/M input, $180/M output

GPT-5.4

📐 128k⚡ Plus/Pro

Previous flagship, still powerful

GPT-4o mini

📐 128k⚡ Rate limited

Available to free users, fast

GPT-4o

📐 128k⚡ Very limited

Very limited for free users

Perplexity AI2 models

Perplexity Default

📐 32k⚡ Fair use

AI search engine, real-time web access

Pro Search

📐 32k⚡ 5/day free

Deep search, 5 per day for free users

🎯 Which should you choose?

Choose ChatGPT (OpenAI) if…

you want Limited requests/day on the free tier.

Choose Perplexity AI if…

you want No limit (basic search) on the free tier.

FAQ

Which is better, ChatGPT (OpenAI) or Perplexity AI?

ChatGPT (OpenAI) scores higher in this free-tier comparison because it wins more of the measured categories. Still, the best choice depends on your exact needs: free chat access, API credits, open-source models, or rate limits.

Does ChatGPT (OpenAI) have a free tier?

Yes. ChatGPT (OpenAI) lists Limited requests/day for free users.

Does Perplexity AI have a free tier?

Yes. Perplexity AI lists No limit (basic search) for free users.

Which one is better for API experiments?

ChatGPT (OpenAI) has no clearly listed free API credits; Perplexity AI has no clearly listed free API credits. Choose the option with enough credits and rate limits for your prototype.

Source snapshot

Data source: yangmao.ai provider YAML tracker plus curated comparison notes. Official dashboards can change credits, limits, model availability, and pricing without notice; verify in the provider console before production.

yangmao.ai comparison slug: chatgpt-vs-perplexity
ChatGPT (OpenAI) source: https://chat.openai.com
Perplexity AI source: https://www.perplexity.ai
Dataset freshness: ChatGPT (OpenAI): 2026-06-15 · Perplexity AI: 2026-06-15
Decision data: Free tier, API credits, rate limits, model list, China access notes, and curated comparison dimensions from the yangmao.ai provider tracker.

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