How do I use GPT models through Api.Airforce?

Point any OpenAI-compatible client at https://api.airforce/v1 and set the model id (for example "gpt-3.5"). Your existing OpenAI SDK works unchanged — you only swap the base URL and API key. The same key also speaks the Anthropic Messages API.

Are any GPT models free?

Yes — 3 of the 55 GPT models are on the free tier and callable at $0 (for example GPT 4o Mini, GPT Oss 120b, GPT Oss 20b). A free account needs no credit card; the remaining models are pay-as-you-go.

How much do GPT models cost on Api.Airforce?

Billing is pay-as-you-go per token, at rates that sit well below the official APIs. The exact per-model input and output prices are listed in the table above and update automatically as upstream prices change.

Which GPT models are available?

Currently 55 GPT models, including GPT 3.5, GPT 3.5 Turbo 16k, GPT 4. The catalog is refreshed as new models launch, so the list above is always current.

Model families

GPT API

OpenAI’s GPT and o-series reasoning models behind one base URL. Use the OpenAI SDK you already have — just change the base URL and key — and compare versions, context and pricing side by side.

55 models3 free at $0OpenAI- & Anthropic-compatiblePay-as-you-go

Model	Tier	Context	Price in / out (1M)
GPT 3.5	Paid	—	$1.05 / $3.30	View
GPT 3.5 Turbo 16k	Paid	—	—	View
GPT 4	Paid	8K	$6.42 / $12.84	View
GPT 4	Paid	—	—	View
GPT 4	Paid	—	$2.13 / $6.42	View
GPT 4 32k	Paid	—	—	View
GPT 4 Turbo	Paid	128K	$2.13 / $6.42	View
GPT 4 Vision	Paid	—	—	View
GPT 4.1	Paid	1M	$0.42 / $1.71	View
GPT 4.1 Nano	Paid	—	$0.03 / $0.09	View
GPT 4o Audio	Paid	—	—	View
GPT 4o Mini	Free	—	$0.20 / $0.20	View
GPT 4o Mini Audio	Paid	—	—	View
GPT 4o Mini Realtime	Paid	—	—	View
GPT 4o Mini Search	Paid	—	$0.30 / $1.35	View
GPT 4o Mini Transcribe	Paid	—	$0.33 / $1.29	View
GPT 4o Mini Tts	Paid	—	—	View
GPT 4o Realtime	Paid	—	—	View
GPT 4o Search	Paid	—	$5.55 / $22.05	View
GPT 4o Transcribe	Paid	—	$0.54 / $2.13	View
GPT 4o Transcribe Diarize	Paid	—	—	View
GPT 5	Paid	400K	$0.27 / $2.13	View
GPT 5 Chat	Paid	—	—	View
GPT 5 Codex	Paid	—	$0.27 / $2.13	View
GPT 5 Nano	Paid	—	$0.03 / $0.09	View
GPT 5.1	Paid	400K	$0.27 / $2.13	View
GPT 5.1 Chat	Paid	—	$0.27 / $2.13	View
GPT 5.1 Codex Mini	Paid	—	$1.17 / $9.56	View
GPT 5.2	Paid	—	$0.36 / $3.00	View
GPT 5.2 Chat	Paid	400K	$0.36 / $3.00	View
GPT 5.2 Codex	Paid	—	$0.36 / $3.00	View
GPT 5.3 Chat	Paid	—	—	View
GPT 5.3 Codex	Paid	—	$0.50 / $4.00	View
GPT 5.4	Paid	—	$1.25 / $7.50	View
GPT 5.4 Mini	Paid	—	$0.45 / $2.20	View
GPT 5.4 Nano	Paid	—	$0.14 / $0.75	View
GPT 5.4 Pro	Paid	—	$15.00 / $90.00	View
GPT 5.5	Paid	—	$1.20 / $6.00	View
GPT 5.6 Luna	Paid	—	$0.85 / $4.60	View
GPT 5.6 Sol	Paid	—	$4.20 / $23.00	View
GPT 5.6 Terra	Paid	—	$2.10 / $11.50	View
GPT Audio	Paid	128K	—	View
GPT Audio 1.5	Paid	—	—	View
GPT Oss 120b	Free	131K	$0.10 / $0.40	View
GPT Oss 20b	Free	131K	— / $0.10	View
GPT Realtime	Paid	—	—	View
GPT Realtime 1.5	Paid	—	—	View
O1	Paid	—	$3.21 / $12.84	View
O3	Paid	200K	$0.42 / $1.71	View
O3 Deep Research	Paid	—	—	View
O3 Mini	Paid	—	$2.91 / $11.64	View
O3 Mini 01.31	Paid	200K	$2.91 / $11.64	View
O4	Paid	200K	$0.24 / $0.93	View
O4 Mini	Paid	200K	$0.99 / $3.90	View
O4 Mini Deep Research	Paid	—	—	View

Call GPT in three lines

Same code as the OpenAI SDK — change the base URL and key, pick a model id:

from openai import OpenAI

client = OpenAI(
    base_url="https://api.airforce/v1",
    api_key="YOUR_KEY",
)

resp = client.chat.completions.create(
    model="gpt-3.5",
    messages=[{"role": "user", "content": "Hello!"}],
)
print(resp.choices[0].message.content)

Frequently asked questions

How do I use GPT models through Api.Airforce?: Point any OpenAI-compatible client at https://api.airforce/v1 and set the model id (for example "gpt-3.5"). Your existing OpenAI SDK works unchanged — you only swap the base URL and API key. The same key also speaks the Anthropic Messages API.
Are any GPT models free?: Yes — 3 of the 55 GPT models are on the free tier and callable at $0 (for example GPT 4o Mini, GPT Oss 120b, GPT Oss 20b). A free account needs no credit card; the remaining models are pay-as-you-go.
How much do GPT models cost on Api.Airforce?: Billing is pay-as-you-go per token, at rates that sit well below the official APIs. The exact per-model input and output prices are listed in the table above and update automatically as upstream prices change.
Which GPT models are available?: Currently 55 GPT models, including GPT 3.5, GPT 3.5 Turbo 16k, GPT 4. The catalog is refreshed as new models launch, so the list above is always current.

Create a free account Browse all models

More model hubs

Claude Gemini Grok DeepSeek Qwen Kimi GLM Doubao MiniMax

NVIDIA ElevenLabs Black Forest Labs (Flux)Suno Vidu