GPT 5.3 Codex by OPENAI
openai/gpt-5.3-codexFastest, most cost-effective GPT model from OpenAI.
Set up the model and run your first generation.
Ctrl ⏎GPT 5.2 Codex$1.75/$14.00 · 1MGPT 5.6 Luna (Azure)$0.20/$1.20 · 1MGPT 5.6 Sol (Azure)$5.00/$30.00 · 1MGPT 5.6 Terra (Azure)$2.00/$12.00 · 1MGPT 6 Astra$10.00/$50.00 · 1MGPT 5.4 mini$0.75/$4.50 · 1MGPT 5.4 nano$0.20/$1.25 · 1MGPT 4.1 mini$0.40/$1.60 · 1M
Questions
- $1.75 per 1M input tokens and $14.00 per 1M output tokens on ElliSekiz — the provider's own price, billed 1:1 from a prepaid USD balance with no markup and no subscription. Failed generations are free.
- POST to https://ellisekiz.ai/api/v1/generations with "model": "openai/gpt-5.3-codex" and your prompt, authenticated with an ElliSekiz API token. The API tab on this page has the full request for this model, including its own parameters.
$1.75 in / $14.00 out per 1M tokens · billed 1:1 at provider cost · compare providers