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gpt-5.3-codexMicrosoft Azure AI @eastus2

in /1M$1.75input tokens
out /1M$14.00output tokens
context400K128K out
trainingnoon your prompts
api
chat
hosting
US
model lab
OpenAI
weights
closed
added
February 2026
model id
azure/gpt-5.3-codex@eastus2

capabilities 6/8

visionreasoningtoolscachingweb searchjson schemacomputer useimage gen

2 providers serve gpt-5.3-codex. This page is one of them. Compare all endpoints

pricing

no markup
input
$1.75
output
$14.00
cache write
-
cache read
$0.17

worked cost

Estimated cost for three request volumes
volumecost
100K in + 10K out$0.31
1M in + 100K out$3.15
10M in + 1M out$31.50

Requesty charges what the upstream provider charges, with no markup and no per-request fee. Prompt caching and smart routing cut the effective cost further on repeated context. Gateway pricing

provider price, passed throughper 1M tokens

measured

through Sep 12

no measured traffic for this endpoint yet. pricing above is the provider's own

benchmarks

artificial analysis
Benchmark scores, each normalised to 100
evalScore as a share of 100/100
GPQA Diamond91.5
τ²-Bench86.0
Terminal-Bench Hard53.0
Humanity's Last Exam42.5
Intelligence Index32.5
5 evalsmean61.1

Scores from Artificial Analysis and public leaderboards, normalised to 100. Bar colour is the band, not the rank: green 80 and up, blue 55 and up, amber 30 and up. Benchmarks measure narrow skills, so test on your own workload before committing. Released 2026-02-05.

policy

data terms
retention
none
trains on prompts
no
hosted in
US
deployment
eastus2

Terms are the provider's, not Requesty's: routing a request here puts it under them. Microsoft Privacy Statement

Need every request to stay in one jurisdiction? EU hosting routes only through EU-hosted providers.

quickstart

openai compatible
azure/gpt-5.3-codex@eastus2

this id pins the microsoft azure ai deployment, with no routing and no failover. the managed id on the canonical page routes across all 2 providers instead

main.py
from openai import OpenAI client = OpenAI(    api_key="YOUR_REQUESTY_API_KEY",    base_url="https://router.requesty.ai/v1",) response = client.chat.completions.create(    model="azure/gpt-5.3-codex@eastus2",    messages=[        {"role": "user", "content": "Explain quantum computing in one paragraph."},    ],) print(response.choices[0].message.content)

Change the base url to https://router.requesty.ai/v1, use your Requesty key, set the model to the id above. Existing OpenAI SDK code needs no other edit, and the same key reaches every other model in the catalog. Browse all models

notes

reference

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.

questions 7

How much does gpt-5.3-codex cost?
gpt-5.3-codex is priced at $1.75 per million input tokens and $14.00 per million output tokens when accessed via Requesty. Prompt caching is supported, which can cut effective input cost by up to 90% on repeated context. Requesty charges exactly what the upstream provider charges, we don't add markup.
What is the context window of gpt-5.3-codex?
gpt-5.3-codex has a context window of 400K tokens, with a maximum output of 128K tokens per response. That is roughly 533 words of input you can fit in a single prompt.
How does gpt-5.3-codex perform on benchmarks?
gpt-5.3-codex scores 91.5% on GPQA Diamond, 86.0% on τ²-Bench, 53.0% on Terminal-Bench Hard. The benchmarks pane shows every published result, each normalised to 100.
What can gpt-5.3-codex do?
gpt-5.3-codex supports vision input, tool calling, extended reasoning, prompt caching, web search, structured outputs (JSON schema). You can call it through any OpenAI-compatible client by pointing base_url to Requesty.
How do I use gpt-5.3-codex with the OpenAI SDK?
Install the OpenAI SDK, set base_url to "https://router.requesty.ai/v1", set your API key to your Requesty key, and set the model to "azure/gpt-5.3-codex@eastus2". The quickstart pane shows Python, JavaScript and cURL snippets.
Can I run gpt-5.3-codex through Requesty?
Yes. gpt-5.3-codex runs through Requesty's OpenAI-compatible API, served from Microsoft Azure AI in eastus2. You do not host the model yourself: point base_url at Requesty, set the model to "azure/gpt-5.3-codex@eastus2", and requests are routed to the upstream provider with automatic failover. The same key gives you 600+ other models too.
What region is this deployment?
This variant of gpt-5.3-codex is deployed in eastus2. Region-specific endpoints matter for data residency, latency to your users, and compliance requirements such as GDPR and HIPAA. Other regions for the same model are listed on the canonical model page.

more from microsoft azure ai 8

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endpointctxin /M
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gpt-5.6-luna1.1M$0.22
gpt-5.6-luna1.1M$0.20
gpt-5.6-luna1.1M$0.22
gpt-5.6-luna1.1M$0.22
gpt-5.6-terra1.1M$2.20
gpt-5.6-terra1.1M$2.20

call gpt-5.3-codex through one endpoint

One key for this endpoint and 600+ other models. No markup on provider prices, automatic failover when a provider degrades, and prompt caching built in. Methodology

gpt-5.3-codexmicrosoft azure aiin $1.75 /1Mout $14.00 /1Mctx 400Khosted US2 providers serve this model