DeepSeek Flash vs GPT-6 Luna
A plain comparison: what they do, what they cost and which to pick for your task.
In short
Both are for simple questions at a tiny price. DeepSeek Flash is stronger in logic and problems; GPT-6 Luna is cheaper and faster for short questions.
GPT-6 Luna is cheaper: an answer costs 2.4 times less than with DeepSeek Flash.
Side by side
| DeepSeek Flash | GPT-6 Luna | |
|---|---|---|
| Maker | DeepSeek, China | OpenAI, USA |
| Type | fast and cheap | fast and cheap |
| Good for | A fast and very cheap DeepSeek. For study, questions and lots of requests. | The cheapest sixth-generation ChatGPT. For simple questions and short answers. |
| Official, $ per 1M | $0.3 / $1.2 | $0.1 / $0.5 |
| Freepay rate | ×0.15 / ×0.6 | ×0.05 / ×0.25 |
| Maker’s subscription | DeepSeek has no subscription; its own chat is free but has queues. | ChatGPT Plus costs $20 a month. |
Prices: your text / answer. The “Freepay rate” shows how many balance tokens a model spends per token of its own; Claude Sonnet 5.5 is ×1.
Which to pick for the task
| Task | Better |
|---|---|
| Problems and logic | DeepSeek Flash |
| Short answers | GPT-6 Luna |
| Price | GPT-6 Luna |
The best way to choose is to ask both models the same question. On Freepay you do it in one chat, switching the model in the input field.
About DeepSeek Flash
A fast and very cheap DeepSeek. For study, questions and lots of requests. DeepSeek is a Chinese model that became famous for nearly matching ChatGPT at a fraction of the price. It is strong in maths, logic and code. More about DeepSeek Flash.
About GPT-6 Luna
The cheapest sixth-generation ChatGPT. For simple questions and short answers. GPT models are made by OpenAI and power ChatGPT, the best-known AI chat. It answers any question, does maths, explains and helps with study. More about GPT-6 Luna.
Frequently asked questions
Which is better, DeepSeek Flash or GPT-6 Luna?
Both are for simple questions at a tiny price. DeepSeek Flash is stronger in logic and problems; GPT-6 Luna is cheaper and faster for short questions.
Which is cheaper, DeepSeek Flash or GPT-6 Luna?
GPT-6 Luna is cheaper: an answer costs 2.4 times less than with DeepSeek Flash. Official prices per 1M tokens: DeepSeek Flash $0.3 / $1.2, GPT-6 Luna $0.1 / $0.5. On Freepay both are 10x cheaper.
Can I use DeepSeek Flash and GPT-6 Luna in one place?
Yes. On Freepay both models are in one chat, you switch them in the input field, and the balance is shared.
Do I need two subscriptions for DeepSeek Flash and GPT-6 Luna?
No. DeepSeek’s own chat is free but needs an account and is often overloaded at peak hours. ChatGPT needs an account, the free plan limits the best models, and ChatGPT Plus is a monthly subscription. On Freepay one key covers both, with no subscription.