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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 docs

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
  }'

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