無料枠比較

主要AIプロバイダーの無料枠・レート制限を比較

プロバイダー	無料枠	レート制限	日次制限	Notes
OpenAI	GPT-4o mini (limited)	3 RPM	200/day	Free tier for new accounts, $5 credit
Anthropic	Claude Haiku (limited)	5 RPM	—	$5 free credit for new accounts
Google AI	Gemini 2.0 Flash, Gemini 2.5 Pro	15 RPM	1,500/day	Most generous free tier
OpenRouter	Multiple free models	20 RPM	200/day	Free models available without API key
DeepSeek	DeepSeek Chat	60 RPM	Unlimited	Very competitive pricing even on paid tier
Groq	Llama, Mixtral, Gemma	30 RPM	14,400/day	Fastest inference, open-source models
Together AI	Llama, Qwen, others	60 RPM	—	Many open-source models available
Cohere	Command R, Embed	20 RPM	1,000/day	Good for RAG/embeddings

Best Free Tier: Google AI (Gemini)

Google AI offers the most generous free tier with 1,500 requests/day for Gemini 2.0 Flash and Gemini 2.5 Pro. Perfect for prototyping and small projects.