GPT-5.3-Codex

OpenAI model details for pricing, context, and release tracking.

Pricing data updated:  Prices normalized to USD per 1M tokens Sample workload: 1M input + 500K output
Model Specs
ProviderOpenAI
Model IDopenai/gpt-5.3-codex
Prompt Price
per 1M tokens		$1.75
Completion Price
per 1M tokens		$14
Sample Workload Cost
1M input + 500K output		$8.75
Context Window400K
Release Date2026-02-24
Popularity RankUnranked
Daily DemandN/A

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Prices are normalized to USD per 1M tokens.
GPT-5.3-Codex Calculating… Estimated monthly API cost
Unit prices $1.75 input / $14 output Per 1M tokens

This estimate uses normalized public API pricing per 1M tokens. It is a planning aid, not a billing quote. Verify provider pricing, limits, and terms before production use.

Model Introduction

GPT-5.3-Codex is OpenAI’s most advanced agentic coding model, combining the frontier software engineering performance of GPT-5.2-Codex with the broader reasoning and professional knowledge capabilities of GPT-5.2. It achieves state-of-the-art results...

Best Fit

GPT-5.3-Codex is best suited for general API evaluation.

Cost Example

A 1M input token plus 500K output token workload is estimated at $8.75.

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