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codingMid-Range

GPT-5.3 Codex

by OpenAI

Optimized for terminal execution, code review, and token efficiency. 77.3% Terminal-Bench, 2-4x fewer tokens per task

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Input Price

$1.75

per 1M tokens

Output Price

$14

per 1M tokens

Context Window

256K

tokens (32.768K max output)

Specifications

Release Date2026-03-01
Categorycoding
Context Window256,000 tokens
Max Output32,768 tokens
ProviderOpenAI
Input Cost$1.75 / 1M tokens
Output Cost$14 / 1M tokens
Price TierMid-Range

Capabilities

textcode

Related Use Cases

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AI Code Assistant

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AI Translation

Calculate the cost of translating text with AI language models.

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Monthly Cost Estimates

Usage LevelDaily TokensDailyMonthlyYearly
Light~50 requests/day100K in / 20K out$0.46$13.65$166
Medium~200 requests/day500K in / 100K out$2.28$68.25$830
Heavy~1K requests/day2,000K in / 500K out$10.50$315.00$3833
Enterprise~5K requests/day10,000K in / 2,000K out$45.50$1365.00$16608

Cost Calculator

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Frequently Asked Questions

How much does GPT-5.3 Codex API cost per million tokens?▼
GPT-5.3 Codex costs $1.75 per million input tokens and $14 per million output tokens as of 2026. These are the standard API rates from OpenAI.
What is the GPT-5.3 Codex context window?▼
GPT-5.3 Codex supports a 256K context window (256,000 tokens), which means you can process up to 256K tokens in a single API call.
How much does GPT-5.3 Codex cost per month?▼
At medium usage (~200 requests/day with 500K input and 100K output tokens/day), GPT-5.3 Codex costs approximately $68.25/month. Light usage runs about $13.65/month, and heavy usage (~1K requests/day) around $315.00/month.
Is there a cheaper alternative to GPT-5.3 Codex?▼
Yes — Gemini 3 Pro by Google is a cheaper option at $2/M input tokens vs $1.75/M for GPT-5.3 Codex. Other budget alternatives include models in the efficient tier.
Is GPT-5.3 Codex good for ai chatbot?▼
GPT-5.3 Codex is a coding model with support for text, code. For ai chatbot, it offers 256K context and costs $1.75/M input tokens — a mid-range option for this use case.

GPT-5.3 Codex Comparisons

codex mini latest vs gpt 5 3 codexgpt 5 3 codex vs o4 mini deep researchgpt 5 3 codex vs o3 deep researchgpt 5 2 vs gpt 5 3 codexgpt 5 2 pro vs gpt 5 3 codexgpt 5 3 codex vs gpt 5 4 progpt 5 3 codex vs gpt 5 4gpt 5 3 codex vs gpt 5 4 mini

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