Claude Haiku 5.5 vs GPT-6 Luna
A plain comparison: what they do, what they cost and which to pick for your task.
In short
The cheapest Claude and ChatGPT models cost the same. Haiku writes more naturally; Luna is a bit better at short factual answers.
Claude Haiku 5.5 and GPT-6 Luna cost about the same per answer.
Side by side
| Claude Haiku 5.5 | GPT-6 Luna | |
|---|---|---|
| Maker | Anthropic, USA | OpenAI, USA |
| Type | fast and cheap | fast and cheap |
| Good for | The fastest and cheapest Claude. For short answers, translations and simple questions. | The cheapest sixth-generation ChatGPT. For simple questions and short answers. |
| Official, $ per 1M | $0.1 / $0.5 | $0.1 / $0.5 |
| Freepay rate | ×0.05 / ×0.25 | ×0.05 / ×0.25 |
| Maker’s subscription | Claude Pro costs about $20 a month. | 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 |
|---|---|
| Natural writing | Claude Haiku 5.5 |
| Short answers | GPT-6 Luna |
| Translation | Claude Haiku 5.5 |
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 Claude Haiku 5.5
The fastest and cheapest Claude. For short answers, translations and simple questions. Claude is made by Anthropic, a US company. People pick it for natural writing, strong code and the way it handles long documents. More about Claude Haiku 5.5.
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, Claude Haiku 5.5 or GPT-6 Luna?
The cheapest Claude and ChatGPT models cost the same. Haiku writes more naturally; Luna is a bit better at short factual answers.
Which is cheaper, Claude Haiku 5.5 or GPT-6 Luna?
Claude Haiku 5.5 and GPT-6 Luna cost about the same per answer. Official prices per 1M tokens: Claude Haiku 5.5 $0.1 / $0.5, GPT-6 Luna $0.1 / $0.5. On Freepay both are 10x cheaper.
Can I use Claude Haiku 5.5 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 Claude Haiku 5.5 and GPT-6 Luna?
No. On claude.ai you need an account and a phone number, the free plan has tight message limits, and Claude Pro is a monthly subscription. 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.