SiChatAppThe free side of SI chat pricing
DeepSeek V4 Flash, GLM 5.3 Flash and GPT-OSS 120B are free to use. They count against a daily allowance instead of your balance: 10 messages for guests, who need no account and whose conversations stay in their own browser tab, and 40 for signed-in users, whose chats are saved. The counter resets every day at midnight UTC.
A free message is only counted when the model answers. If our automated content check blocks a message, it never touches your allowance, and if the model is busy or sends back nothing, the message is handed back. Messages can be up to 8,000 characters long, and anyone sending around 20 messages a minute is asked to slow down for a moment.
Credits per message on each premium model
The premium models are DeepSeek V4 Pro, GLM 5.3, Kimi K2.6 and Qwen3.8 27B. All of them reason before they reply, so they handle math, code, planning and long writing better than the free tier. This table is the heart of SI chat pricing: what one message costs on each model at three sizes, plus the amount set aside before a reply begins.
| Model | Maker | Short | Typical | Long | Held first |
|---|---|---|---|---|---|
| DeepSeek V4 Pro | DeepSeek | 1 | 3 | 8 | 21 |
| GLM 5.3 | Zhipu | 1 | 3 | 9 | 23 |
| Kimi K2.6 | Moonshot AI | 1 | 3 | 8 | 21 |
| Qwen3.8 27B | Alibaba | 1 | 2 | 5 | 17 |
Sizes are counted in tokens, the word pieces models read and write. Short means 300 in and 200 out, a quick question. Typical means 1,500 in and 600 out, the figure printed beside each model in the chat menu. Long means 4,000 in and 2,000 out, such as a detailed plan or a page of code. Our rates follow the per-token list prices Cloudflare charges us for each model, which is why GLM 5.3 costs more than Qwen3.8 27B.
How a premium message is billed
Under SI chat pricing on SiChatApp, a premium message goes through four steps, in this order.
- Before the reply. We estimate the input — your message, the earlier messages sent along with it and a short instruction — and set aside the most the reply could cost if it used its full allowance of up to 8,192 tokens. If your balance is lower than that, nothing is sent and the chat tells you how many credits the message needs.
- While it writes. The answer streams in word by word. Any thinking the model does first counts as output, because the model really produces those tokens.
- After the reply. The model reports the exact token counts, we charge that price (never less than one credit), and the rest of the hold returns to your balance at once. The cost appears under the reply.
- If it goes wrong. A reply that produces nothing is free and the whole hold comes back. A reply that breaks off halfway is billed only for the tokens it produced.
One thing to know: the Stop button ends the reply on our side as well, so a stopped premium reply costs only what was produced before you pressed it, and the rest of the hold comes back.
Why long conversations cost more
Models have no memory between messages, so every new question is sent together with the recent history of the chat. Since SI chat pricing counts every token the model reads, in a long thread that history becomes most of the input, and the price per message climbs a little each turn. Starting a fresh chat for a new topic keeps each message close to the short or typical size in the table.
What a credit pack covers
- Starter (1,100 credits): about 366 typical questions on GLM 5.3, or 550 on Qwen3.8 27B; around 2.7¢ per GLM 5.3 message.
- Creator (3,600 credits): 30 typical GLM 5.3 messages a day for about 40 days, with no free messages used at all.
- Studio (10,400 credits): roughly 1,155 long answers on GLM 5.3, enough for a team drafting reports or reviewing code every day.
Under SI chat pricing on SiChatApp, the per-message price is identical in every pack; larger packs only add more bonus credits. All purchases go into one balance, so a later pack simply tops up the last one.
SI chat pricing compared with AI chat subscriptions
Most AI chat services charge a flat monthly fee, whether you send a thousand messages or none. SI chat pricing on SiChatApp works the other way round. Everyday questions run on free models, and credits are spent only when a harder task needs a premium model. A busy week costs what it uses, a quiet month costs nothing, and there is no renewal date to remember. For people who chat in bursts, this is usually far cheaper than a subscription.
How to keep premium replies cheap
- Draft on a free model and switch to a premium one only for the step that needs deeper reasoning.
- Open a new chat when the topic changes, so old history is not resent with every message.
- Ask for the length you want, for example “answer in five bullet points” or “code only, no explanation”.
- Use Qwen3.8 27B for translation and everyday writing at about 2 credits per typical message.
- Open the gift center once a day to collect the check-in reward.
Free credits and new-member bonus
Create your account with Google and 80 credits are added straight away, enough to compare every premium model on your own questions. Accounts made with an email link get the free daily messages but not this bonus. During your first 48 hours, your first pack earns 30% more: a Starter pack would arrive as 1,430 credits. The gift center adds small rewards: a welcome gift, a daily check-in with a seven-day streak bonus, and gifts for rating the site, sharing it and inviting friends. Gift credits have no cash value, but they pay for replies like any other credit.
SI chat pricing questions
Can I chat for free without an account?
Yes. Guests get 10 messages a day on the free models with no sign-up at all. Signing in raises the allowance to 40 a day and keeps your chats. Premium models need an account with credits.
When does the free allowance reset?
At midnight UTC. Unused free messages do not roll over to the next day, and they cannot be turned into credits.
Is there a monthly plan?
No. SiChatApp sells one-time credit packs only, so nothing renews and there is nothing to cancel.
Why do I need more credits than the typical price to send a message?
Before a premium reply starts, the most it could cost is set aside — 17 to 23 credits for a typical conversation. When the reply ends, the real price is charged and the rest of the hold goes straight back to your balance.
Do hidden reasoning tokens cost credits?
Yes. The premium models think before they answer, and that thinking is billed as output tokens, just like the visible text. It is already included in every figure on this page.
How do I pay?
Checkout runs on Stripe. Your card details go to Stripe, not to us, and the credits are added to your account as soon as the payment is confirmed.
Can I get my money back?
Replies that fail are refunded in credits automatically. Pack purchases are final once the credits arrive, except for billing mistakes and the cases listed in our refund policy.
Anything else about SI chat pricing on SiChatApp? Email support@sichatapp.com. The chat app shows each model’s price next to its name, the SiChatApp home page introduces the free models, and our refund policy, terms of service and privacy policy cover payments, rules and data.
