openai / text-generation API-only released 2026-02-24

GPT-5.3-Codex

Name: GPT-5.3-Codex
Price: 1.75 USD
Author: openai

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...

Input / 1M

$1.75

Output / 1M

$14.00

Context

400K

AA Intelligence

32.5

Closed weights — available only as a hosted API text + image + file → text View on OpenRouter ↗

Pricing

via OpenRouter · USD per 1M tokens · synced 2026-10-24

$1.75

input / 1M

$14.00

output / 1M

$0.18

cached input / 1M

$15.75

1M in + 1M out

Context window: 400,000 tokens
Max output: 128,000 tokens
Providers: 2
Cheapest provider: Azure · $1.75 / $14.00
Best throughput: —
AA Intelligence / Coding / Agentic: 32.5 / — / —

✓ Tool calling ✓ Reasoning ✓ Structured outputs ✓ Image input ✓ File input ✗ Audio input ✓ Prompt caching

Price history

tracking started — chart appears after 7 days of snapshots (6 recorded)

Current: $1.75 input · $14.00 output per 1M tokens

Benchmarks

Third-party indices as published through OpenRouter — Artificial Analysis and Design Arena. Not measured by us.

AA Intelligence Index: 32.5
AA Coding Index: —
AA Agentic Index: —

Design Arena

CategoryEloWin %Rank

androidnative 1084 35.2% #31

fullstack 983 36.5% #42

godotgamedev 1124 45.1% #27

mobileapps 1053 41.4% #46

webapps 1032 36.9% #43

3d 1008 35.3% #110

asciiart 1152 51.2% #42

codecategories 1145 47.2% #88

dataviz 1164 50.6% #75

gamedev 1161 51.3% #72

svg 1129 54% #56

uicomponent 1135 47.3% #83

website 1163 48.6% #85

Providers

2 providers · per 1M tokens · last 30 min metrics

Provider	Quant	Context	Input	Output	Uptime	Tok/s
Azure	unknown	400K	$1.75	$14.00	—	—
OpenAI	unknown	400K	$1.75	$14.00	100%	—
OpenAI	unknown	400K	$3.50	$28.00	—	—

Provider data from OpenRouter's endpoint listing, refreshed daily.

Specifications

Organisation: openai
Released on OpenRouter: 2026-02-24
Context window: 400,000 tokens
Max output: 128,000 tokens
Input: text, image, file
Output: text
Tokenizer: GPT
Moderated by provider: Yes
OpenRouter id: openai/gpt-5.3-codex

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Browse

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Prices, context and providers from the public OpenRouter API, snapshotted daily; benchmark indices from Artificial Analysis. See /methodology.