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OpenAI·Text60%+ off vs official

GPT-5.3 CodexAPI

OpenAI GPT-5.3 Codex — coding-specialized.

Input price

$0.70

per 1M tokens

Output price

$5.60

per 1M tokens

Prompt caching

Pass cache_control on a stable prefix and cache hits bill at a fraction of input. Cache writes bill at the plain input rate.

Cache read
$0.14

Auto-derived from input × 0.2

Specs

Model ID
gpt-5-3-codex
Endpoint
POST /v1/chat/completions
Category
Text
Provider
OpenAI
Capabilities
functionstreamingthinkinglong-context

Drop-in OpenAI compatibility

Point your existing OpenAI SDK at api.kunavo.com/v1 and swap the model id. No streaming changes, no SDK changes.

View docsGPT API pricing guide

Try it

Set KUNAVO_API_KEY from /app/keys, then run any of the snippets below.

curl
curl https://api.kunavo.com/v1/chat/completions \
  -H "Authorization: Bearer $KUNAVO_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "gpt-5-3-codex",
    "messages": [
      {"role": "user", "content": "Hello, GPT-5.3 Codex"}
    ],
    "stream": false
  }'

FAQ

How much does GPT-5.3 Codex cost?

On Kunavo, GPT-5.3 Codex is $0.70 per 1M input tokens and $5.60 per 1M output tokens — about 60% under OpenAI's official price. Failed requests are never billed, and it's pay-as-you-go — you only pay for successful calls.

Can I call GPT-5.3 Codex with the OpenAI SDK?

Yes. Set base_url to https://api.kunavo.com/v1, pass your Kunavo key, and set model to "gpt-5-3-codex". Requests and responses are OpenAI-compatible.

What endpoint does GPT-5.3 Codex use?

GPT-5.3 Codex is called via POST /v1/chat/completions on Kunavo's OpenAI-compatible API.

What is GPT-5.3 Codex good for?

GPT-5.3 Codex is a text model from OpenAI, with support for function, streaming, thinking, long-context.

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