GPT-5.3 Codex

OpenAI · Text

OpenAI GPT-5.3 Codex, specialised for programming and agentic coding. Served through getmodel's stable Codex Pro pool over an OpenAI-compatible endpoint. GPT-5.3 Codex is available on GetModel via an OpenAI-compatible API, billed pay-as-you-go. Get one key and call it from any OpenAI SDK.

Pricing

How to call

curl https://getmodel.ai/v1/chat/completions \
  -H "Authorization: Bearer $GETMODEL_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"model":"gpt-5.3-codex","messages":[{"role":"user","content":"Hello"}]}'

from openai import OpenAI
client = OpenAI(base_url="https://getmodel.ai/v1", api_key="$GETMODEL_API_KEY")
resp = client.chat.completions.create(
    model="gpt-5.3-codex",
    messages=[{"role": "user", "content": "Hello"}],
)
print(resp.choices[0].message.content)

Details

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