Free models
Free LLM API: models that cost $0 to call
Call Claude, GPT, Gemini and DeepSeek through one OpenAI-compatible key. Everything below is fetched from the live catalog, so it reflects what costs $0 at the moment the page loads.
Free models at a glance
- Free models
- 3
- Largest context
- 262K
- Largest output
- 235K
Free models right now
Rates checked:
| Model | Provider | Context | Input tokens | Output tokens | Status | |
|---|---|---|---|---|---|---|
| Flint (free) | Recursive | 262.144K | TextText | $0 | $0 | Free |
| Gemma 4 26B A4B (free) | 262.144K | Image · Text · VideoText | $0 | $0 | Free | |
| XingChen: Xing4.0 29B A4B (free) | Xingchen-agi | 262.144K | TextText | $0 | $0 | Free |
Rates refresh automatically; the model page is the source of truth at request time.
What "free" means here
- 01
Two things count as free: a model whose published rate is $0 (badge Free), and a model in a limited-time trial (badge Free trial). Trial pricing can change at any time — the rate shown for the model when you send a request is the one that applies.
- 02
Free models still need a funded account. If your balance is zero or negative, requests are rejected even when the model itself is free.
- 03
Trials apply to a specific model, not to your account — check the badge on the model page you plan to call.
One key, every model
The same key works across OpenAI Chat Completions, OpenAI Responses and Anthropic Messages, so an existing OpenAI SDK client only needs a base URL and key swap.
curl https://openapi.felo.ai/api/v1/messages \
-H "Authorization: Bearer $FELO_API_KEY" \
-H "Content-Type: application/json" \
-d '{
"model": "flint-v1.0:free",
"max_tokens": 1024,
"messages": [
{
"role": "user",
"content": "Hello"
}
]
}'Free models vs. the full catalog
The key, the endpoints and the SDK calls are identical. What differs is what the model costs when you send a request.
Models on this page
Zero-rate models and limited-time trials, listed above.
- $0 or trial rate at request time
- Full context and output limits
- Same endpoints as the paid ones
The rest of the catalog
Every other model, billed by usage at its published rate.
- Claude, GPT, Gemini, DeepSeek and more
- No monthly minimum, no subscription
- Balance must stay above $0
Free to start, pay for what you use
Creating a key, reading the docs and using the playground cost nothing. Outside a trial, each call is billed at the published rate for the usage it consumes, deducted from your service credits — no subscription and no monthly minimum. Keep your balance above zero: requests are rejected at zero or negative, including on free models.
Cheapest paid models
If the free models do not fit, these are the lowest input rates in the catalog right now.
| Model | Provider | Context | Input tokens | Output tokens | |
|---|---|---|---|---|---|
| Claude Haiku 5.5 | Anthropic | 1M | Text · Image · FileText | $0.10 | $0.50 |
| GPT-6 Luna | OpenAI | 1.05M | File · Image · TextText | $0.10 | $0.50 |
| MiMo-V2.6-Flash | Xiaomi | 1.05M | Text · Image · Video · AudioText | $0.14 | $0.28 |
| GLM 5.3 Flash | Z.ai | 1.049M | Text · Image · VideoText | $0.15 | $0.50 |
| MiniMax M3.1 Flash | MiniMax | 1.049M | Text · Image · VideoText | $0.15 | $0.60 |
Frequently asked questions
Is there a free tier?
There is no unlimited or recurring free credit allowance. A model can be free in two ways: a published rate of $0, or a limited-time trial. This page lists both.
What happens when a trial ends?
The model keeps working at its published rate and leaves this list. Nothing else changes.
Can I use free-trial models with the OpenAI SDK?
Yes. Trial models use the same endpoints and the same key — trial status only affects billing, not how you call the model.
How often does this list change?
It is generated from the live model catalog and refreshes automatically, so it always shows the current state.
Do free models need credits?
Yes — keep a positive balance. A zero or negative balance blocks requests even when the selected model is free.
Can a free model start charging?
Yes. Trials are limited-time and the model’s price can change at any time. Check the price on the model page when you send the request; that rate applies.
Is the API key free, and do I need a credit card?
Creating the key is free and requires no credit card. Calling any model — free ones included — needs a funded balance, and service credits start at $1 with no subscription.
Get an API key in 30 seconds
Create a key, top up from $1 and send the request above with any OpenAI SDK. There is no sales call and no subscription.