Free AI platform comparison

OpenAI vs Google AI (Gemini): Free Tier and API

OpenAI vs Google AI (Gemini) is a practical comparison for developers choosing an AI platform with usable free access. OpenAI offers ChatGPT free tier unlimited on the free tier, while Google AI (Gemini) offers Gemini free tier unlimited on the free tier. For API usage, OpenAI includes $5 with a 3 RPM (free tier) limit, and Google AI (Gemini) includes 免费 API 无需信用卡 with a 15 RPM (Flash) limit. This page compares the two tools across free tier, free API, rate limits, open-source availability, model coverage, and GitHub traction, then gives a quick recommendation so you can decide whether to test OpenAI, Google AI (Gemini), or both.

Quick decision

OpenAI vs Google AI (Gemini): pricing, free API, and limits

Quick answer: choose OpenAI if its free tier, model family, or ecosystem fits your app better; choose Google AI (Gemini) 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 tierOpenAI: ChatGPT free tier unlimited · Google AI (Gemini): Gemini free tier unlimited
Free API$5 vs 免费 API 无需信用卡
Best checkCredits, rate limits, setup friction
DecisionTest both if rank, latency, or access matters
OpenAI

OpenAI

70pts
0 wins
VS
Google AI (Gemini)

Google AI (Gemini)

70pts
1 wins

🤝 It's a tie — both have their strengths

📊 Side-by-Side

Category
OpenAI
Google AI (Gemini)
Free Tier
✅ ChatGPT free tier unlimited
✅ Gemini free tier unlimited
Free API
✅ $5
✅ 免费 API 无需信用卡
Rate Limit
3 RPM (free tier)
15 RPM (Flash)
Open Source
❌ No
❌ No
Free Models
3
3
GitHub Stars
-
⭐ 2,291

🧠 Model Details

OpenAI3 models
GPT-5.2
📐 128k⚡ 80 RPM
Latest flagship model, strong multimodal capabilities
GPT-5.4 mini
📐 128k⚡ 200 RPM
Lightweight fast model, cost-effective
GPT Image 2
📐 N/A⚡ 50 RPD
Latest image generation model
Google AI (Gemini)3 models
Gemini 3.1 Pro
📐 2M⚡ 2 RPM (free)
Flagship model, 2M token context window
Gemini 3.1 Flash
📐 1M⚡ 15 RPM (free)
Fast model, 1M token context
Gemini 3.1 Flash Lite
📐 1M⚡ 30 RPM (free)
Lightest model, fastest speed

🎯 Which should you choose?

Choose OpenAI if…

you want ChatGPT free tier unlimited on the free tier, plus $5 for API tests.

Choose Google AI (Gemini) if…

you want Gemini free tier unlimited on the free tier, plus 免费 API 无需信用卡 for API tests.

FAQ

Which is better, OpenAI or Google AI (Gemini)?

OpenAI and Google AI (Gemini) are closely matched in this comparison. Test both if your workload depends on model quality, API latency, or regional access.

Does OpenAI have a free tier?

Yes. OpenAI lists ChatGPT free tier unlimited for free users.

Does Google AI (Gemini) have a free tier?

Yes. Google AI (Gemini) lists Gemini free tier unlimited for free users.

Which one is better for API experiments?

OpenAI offers $5; Google AI (Gemini) offers 免费 API 无需信用卡. Choose the option with enough credits and rate limits for your prototype.

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