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GPT-5.3 Codex

GitHub Copilot

GPT-5.3 Codex by GitHub Copilot costs $1.75 per 1M input tokens and $14.00 per 1M output tokens, with a 400K-token context window.

Pricing

Input (per 1M tokens)
$1.75
Output (per 1M tokens)
$14.00
Cached input (per 1M)
$0.18

Specifications

Provider
GitHub Copilot
Context window
400K tokens
Parameters
—
Released
Feb 2026
Open weights
No
Frontier model
No

Compare GPT-5.3 Codex with…

GPT-5.3 Codex vs GPT-5.2$14.00/1MGPT-5.3 Codex vs GPT-5.2 Chat$14.00/1MGPT-5.3 Codex vs GPT-5.3 Chat$14.00/1MGPT-5.3 Codex vs GPT-5.2-Codex$14.00/1MGPT-5.3 Codex vs grok-4-0709$13.50/1MGPT-5.3 Codex vs Claude 4 Sonnet$14.99/1M

FAQ

How much does GPT-5.3 Codex cost?

GPT-5.3 Codex is priced at $1.75 per 1M input tokens and $14.00 per 1M output tokens. Output tokens cost more than input.

What is GPT-5.3 Codex's context window?

GPT-5.3 Codex supports a context window of 400K tokens — the maximum prompt plus response length it can handle in a single request.

Is GPT-5.3 Codex open weight?

No — GPT-5.3 Codex is a closed/proprietary model accessed via API.

Data as of 2026-10-15. Source: models.dev (open). Pricing is per 1M tokens (USD); confirm with the provider before production use.