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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.
52 models3 free at $0OpenAI- & Anthropic-compatiblePay-as-you-go
| Model | Tier | Context | Price in / out (1M) | |
|---|---|---|---|---|
| Gpt 3.5 | Paid | — | $1.71 / $3.42 | View |
| Gpt 3.5 Turbo 16k | Paid | — | $10.26 / $20.52 | View |
| Gpt 4 | Paid | 8K | $6.42 / $12.84 | View |
| Gpt 4 0125 | Paid | — | $2.13 / $4.29 | View |
| Gpt 4 1106 | Paid | — | $2.13 / $4.29 | View |
| Gpt 4 32k | Paid | — | $205.32 / $410.67 | View |
| Gpt 4 Turbo | Paid | 128K | $2.13 / $6.42 | View |
| Gpt 4 Vision | Paid | — | $2.13 / $4.29 | View |
| Gpt 4.1 | Paid | 1M | $0.30 / $1.20 | View |
| Gpt 4.1 Nano | Paid | — | $0.03 / $0.09 | View |
| Gpt 4o Audio | Paid | — | $13.23 / $52.89 | View |
| Gpt 4o Mini | Free | — | $0.20 / $0.20 | View |
| Gpt 4o Mini Audio | Paid | — | $0.39 / $1.59 | View |
| Gpt 4o Mini Realtime | Paid | — | $2.04 / $8.22 | View |
| Gpt 4o Mini Search | Paid | — | $0.51 / $2.04 | View |
| Gpt 4o Mini Transcribe | Paid | — | $0.33 / $1.29 | View |
| Gpt 4o Mini Tts | Paid | — | $1.59 / $31.74 | View |
| Gpt 4o Realtime | Paid | — | $17.10 / $68.43 | View |
| Gpt 4o Search | Paid | — | $8.55 / $34.23 | View |
| Gpt 4o Transcribe | Paid | — | $0.54 / $2.13 | View |
| Gpt 4o Transcribe Diarize | Paid | — | $6.60 / $26.43 | View |
| Gpt 5 | Paid | 400K | $0.27 / $2.13 | View |
| Gpt 5 Chat | Paid | — | $1.11 / $8.88 | View |
| Gpt 5 Codex | Paid | 400K | $0.27 / $2.13 | View |
| Gpt 5 Nano | Paid | — | — / $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 | — | $0.55 / $4.41 | 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 | — | $0.03 / $0.33 | View |
| Gpt 5.3 Chat | Paid | — | $0.36 / $3.00 | View |
| Gpt 5.3 Codex | Paid | — | $0.50 / $4.00 | View |
| Gpt 5.4 | Paid | — | $0.75 / $5.00 | View |
| Gpt 5.4 Mini | Paid | — | $0.20 / $1.20 | View |
| Gpt 5.4 Nano | Paid | — | $0.10 / $0.60 | View |
| Gpt 5.4 Pro | Paid | — | $13.24 / $79.43 | View |
| Gpt 5.5 | Paid | — | $1.20 / $6.00 | View |
| Gpt Audio | Paid | 128K | $13.23 / $26.43 | View |
| Gpt Audio 1.5 | Paid | — | $6.60 / $26.43 | View |
| Gpt Oss 120b | Free | 131K | $0.15 / $0.15 | View |
| Gpt Oss 20b | Free | 131K | $0.10 / $0.10 | View |
| Gpt Realtime | Paid | — | $10.59 / $21.15 | View |
| Gpt Realtime 1.5 | Paid | — | $10.59 / $42.30 | View |
| O1 | Paid | — | $2.25 / $9.00 | View |
| O3 | Paid | 200K | $0.30 / $1.20 | View |
| O3 Deep Research | Paid | — | $34.23 / $136.89 | View |
| O3 Mini | Paid | — | $2.91 / $11.64 | View |
| O3 Mini 2025 01 31 | Paid | 200K | $2.91 / $11.64 | View |
| O4 | Paid | 200K | $0.18 / $0.66 | View |
| O4 Mini | Paid | 200K | $0.99 / $3.90 | View |
| O4 Mini Deep Research | Paid | — | $6.84 / $27.39 | 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 52 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 52 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.