ChatGPT Plus is $20/month whether you use it or not. NanoGPT charges per prompt. The question that actually matters: which one costs less for how you actually use AI?
I cancelled my ChatGPT Plus subscription in March 2026 after realizing I was paying $20 for maybe 10-15 prompts on a good day. Some weeks I didn't use it at all. Here's what I found after switching.
The Cost Breakdown
| Service | Monthly Cost | Models | Rate Limits |
|---|---|---|---|
| ChatGPT Plus | $20/month flat | GPT-4o, GPT-4, DALL-E, browsing | 80 msgs/3hrs on GPT-4o |
| Claude Pro | $20/month flat | Claude 3.5 Sonnet, Claude 3 Opus | Usage caps vary |
| Google One AI Premium | $20/month flat | Gemini Advanced, 2TB storage | Usage caps apply |
| NanoGPT | Pay as you go | All models: GPT-4o, Claude, Gemini, DeepSeek, Llama | No limits |
Real Monthly Costs by Usage
Light User: 5-10 prompts per day
Moderate User: 20-50 prompts per day
Heavy User: 100+ prompts per day
When ChatGPT Plus Actually Wins
I'll be honest, there are cases where the subscription makes more sense. If you're hammering GPT-4o 200+ times a day, the flat $20 is probably cheaper. Same goes if you rely heavily on DALL-E for image generation, or if you're deep in the ChatGPT plugin ecosystem with custom GPTs and all that. For heavy, single-model users who mostly stick to OpenAI, the subscription is the better deal.
Where NanoGPT Actually Wins
If you use AI a few times a day, not constantly, NanoGPT saves real money. Also if you bounce between models, Claude for writing, GPT-4o for code, DeepSeek for math, want privacy, or need an API for tools like SillyTavern without juggling separate keys. One account, all the models. That's the real value.
For me personally, the model switching alone justifies it. I use Claude 3.5 Sonnet for most of my writing (it just reads better), GPT-4o for code reviews, and DeepSeek V3 for quick math stuff. Before NanoGPT, I would have needed three separate subscriptions at $60/month total.
The Model Hopper Advantage
Three separate AI subscriptions, OpenAI + Anthropic + Google, would run you $60/month. If you like picking the right model for each task, NanoGPT gives you all of them without that bill. I switch between Claude and GPT-4o constantly, the savings add up fast.