gpt-5.3-codexOpenAI
- endpoints
- 2
- regions
- 2
- api
- chat
- released
- February 2026
capabilities 6/8
| # | flags | ||||||
|---|---|---|---|---|---|---|---|
| 1 |  OpenAI Inc. | Global | 400K | $1.75 | $14.00 | $0.17 | no-train |
| 2 |  Microsoft Azure AI | eastus2 | 400K | $1.75 | $14.00 | $0.17 | zdr |
no measured traffic for this model yet. the endpoints table above carries provider pricing
| eval | Score as a share of 100 | /100 |
|---|---|---|
| GPQA Diamond | 91.5 | |
| τ²-Bench | 86.0 | |
| Terminal-Bench Hard | 53.0 | |
| Humanity's Last Exam | 42.5 | |
| Intelligence Index | 32.5 | |
| 5 evals | mean | 61.1 |
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.
gpt-5.3-codexrequesty routes this id across every provider serving gpt-5.3-codex, picking on price and health and failing over automatically. the id stays valid when a provider changes underneath it
Base url is https://router.requesty.ai/v1 for every id here. One key reaches the whole catalog.
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="gpt-5.3-codex", messages=[ {"role": "user", "content": "Explain quantum computing in one paragraph."}, ],) print(response.choices[0].message.content)
Change the base url, use your Requesty key, set the model to any id in the call pane. Existing OpenAI SDK code needs no other edit, and the same key reaches every other model in the catalog, so switching later is a one-parameter change. Browse all models
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 6
Which providers serve gpt-5.3-codex?
How much does gpt-5.3-codex cost?
Is gpt-5.3-codex open weights?
What is the context window of gpt-5.3-codex?
How do I use gpt-5.3-codex with the OpenAI SDK?
Should I call gpt-5.3-codex by its managed id or a provider id?
more from openai 6
| model | context | from /M | providers |
|---|---|---|---|
| gpt-6-astra | 1.1M | $5.00 | 2 |
| gpt-5.6-luna | 1.1M | $0.10 | 3 |
| gpt-5.6-terra | 1.1M | $1.00 | 3 |
| gpt-5.6-sol | 1.1M | $2.50 | 3 |
| gpt-5.5-pro | 1.1M | $30.00 | 1 |
| gpt-5.5 | 1.1M | $2.50 | 3 |
route gpt-5.3-codex through one endpoint
One key for 2 providers on this model and 600+ others. No markup on provider prices, automatic failover, caching built in. Weekly aggregates in the measured pane come from production traffic routed through Requesty, one line per provider on a shared axis. Methodology