How much does GPT-5.3-Codex cost per token?

GPT-5.3-Codex is priced at $1.75 per million input tokens and $14.00 per million output tokens, per OpenRouter as of Aug 9, 2026.

What is GPT-5.3-Codex's context window?

GPT-5.3-Codex supports a context window of up to 400K tokens, per OpenAI.

How widely used is GPT-5.3-Codex?

GPT-5.3-Codex accounts for about 0.2% of tracked OpenRouter coding-token volume as of Jun 18, 2026.

What are the alternatives to GPT-5.3-Codex?

By OpenRouter usage, comparable models include DeepSeek V4 Flash, Hy3, and Nemotron 3 Ultra. Side-by-side comparisons are linked in the alternatives table.

ModelsOpenAI

GPT-5.3-Codex

Name: GPT-5.3-Codex
Author: OpenAI

openrouter price docs

Context

400K

tokens

Released

Feb 24, 2026

on OpenRouter

Token share

0.2%

OpenRouter · Jun 18, 2026

Pricing

Price per million tokens

Input $/MTok

$1.75

OpenRouter · Aug 9, 2026

Output $/MTok

$14.00

OpenRouter · Aug 9, 2026

Cache read $/MTok

$0.17

OpenRouter

Current GPT-5.3-Codex prices per million tokens across tracked sources.
Source	Tracked slug	In $/MTok	Out $/MTok	Cache read	Cache write	Context	Effective	Last Δ (in)
OpenRouter	openai/gpt-5.3-codex	$1.75	$14.00	$0.17	—	400K	Aug 9, 2026	—
models.dev	opencode/gpt-5.3-codex	$1.75	$14.00	$0.17	—	400K	Aug 9, 2026	9.4%

latest tracked price per source · Δ = most recent input-price move within that source

2 sources tracking

Input $/MTok

Output $/MTok

per-source step lines · $/MTok

history since Jul 8, 2026

Specs

Context & availability

GPT-5.3-Codex specifications.
Provider	OpenAI
Context window	400K tokens
Listed on OpenRouter	Feb 24, 2026
Tracked price sources	OpenRouter · models.dev
OpenRouter slugs	openai/gpt-5.3-codex · openai/gpt-5.3-codex-20260224

source: OpenRouter model catalog + tracked price feeds

id: gpt-5-3-codex

Usage

Share of OpenRouter tokens

90-day · to Jun 18, 2026

source: OpenRouter model rankings · share of tracked coding-token volume

0.2% on Jun 18, 2026

Benchmarks

Benchmark results

Benchmark scores for GPT-5.3-Codex.
Benchmark	Configuration	Score	Date	Source
no benchmark results attributed to GPT-5.3-Codex yet

scores as published by each benchmark; configurations differ — compare within a row's benchmark only

Alternatives

Similar models

Alternatives to GPT-5.3-Codex by OpenRouter usage-rank proximity.
#	Model	Tokens/day	7d Δ	Head-to-head
1	DeepSeek V4 FlashDeepSeek	2.7T	18.7%	vs GPT-5.3-Codex
2	Hy3Tencent	1.3T	11.6%	vs GPT-5.3-Codex
5	Nemotron 3 UltraNVIDIA	733B	106.3%	vs GPT-5.3-Codex
7	GLM 5.2Z.ai	533B	41%	vs GPT-5.3-Codex

ranked by OpenRouter usage-rank proximity

snapshot Aug 20, 2026

FAQ

GPT-5.3-Codex FAQ

How much does GPT-5.3-Codex cost per token?: GPT-5.3-Codex is priced at $1.75 per million input tokens and $14.00 per million output tokens, per OpenRouter as of Aug 9, 2026.
What is GPT-5.3-Codex's context window?: GPT-5.3-Codex supports a context window of up to 400K tokens, per OpenAI.
How widely used is GPT-5.3-Codex?: GPT-5.3-Codex accounts for about 0.2% of tracked OpenRouter coding-token volume as of Jun 18, 2026.
What are the alternatives to GPT-5.3-Codex?: By OpenRouter usage, comparable models include DeepSeek V4 Flash, Hy3, and Nemotron 3 Ultra. Side-by-side comparisons are linked in the alternatives table.

Alerts

Track GPT-5.3-Codex

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