GPT-5.3 Codex
GPT-5.3 Codex is OpenAI's language model with a 400K context window and up to 128K output tokens, available from 5 providers, starting at $1.75 / 1M input and $14.00 / 1M output. A GPT-5.3 variant optimized for agentic coding in Codex environments, supporting low through xhigh reasoning effort settings via the Responses API.
OpenAI's language model with a 400K context window and up to 128K output tokens, available from 5 providers, starting at $1.75 / 1M input and $14.00 / 1M output. A GPT-5.3 variant optimized for agentic coding in Codex environments, supporting low through xhigh reasoning effort settings via the Responses API.openai-gpt-5-3-codex |
| Language |
| Active |
| OpenAI |
| 400K tokens |
| 128K tokens |
| ImagePdfText |
| Text |
| defaultminimal |
| · 2 months ago |
53.6#3 |
53.1#2 |
0.9#2 |
0.4#2 |
0.8#7 |
71.34s#343 |
0.5#4 |
0.7#3 |
0.5#2 |
0.9#32 |
75.0#112 |
Capabilities
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Output1/5
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Capabilities7/13
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Pricing by Provider
| Provider | Standard | ||
|---|---|---|---|
| Input $ / 1M | Output $ / 1M | Cache Read $ / 1M | |
 Azure AI Foundry | $1.75 | $14.00 | $0.175 |
 GitHub Models | $1.75 | $14.00 | $0.175 |
OpenAI | $1.75 | $14.00 | $0.175 |
 OpenRouter | $1.75 | $14.00 | $0.175 |
 Vercel AI Gateway | $1.75 | $14.00 | $0.175 |
Regional pricing
Provider-specific pricing that varies by region.
Azure AI Foundry
25 regions
| Region | Standard | ||
|---|---|---|---|
| Input $ / 1M | Output $ / 1M | Cache Read $ / 1M | |
| Global | |||
| Global | $1.75 | $14.00 | $0.175 |
| Africa | |||
| South Africa North (Johannesburg)/ southafricanorth | $1.75 | — | $0.175 |
| Asia Pacific | |||
| Australia East (New South Wales)/ australiaeast | $1.75 | — | $0.175 |
| Japan East (Tokyo, Saitama)/ japaneast | $1.75 | — | $0.175 |
| Korea Central (Seoul)/ koreacentral | $1.75 | — | $0.175 |
| South India (Chennai)/ southindia | $1.75 | — | $0.175 |
| Canada | |||
| Canada East (Quebec)/ canadaeast | $1.75 | — | $0.175 |
| Europe | |||
| France Central (Paris)/ francecentral | $1.93 | — | $0.193 |
| Germany West Central (Frankfurt)/ germanywestcentral | $1.93 | — | $0.193 |
| Norway East (Norway)/ norwayeast | $1.75 | — | $0.175 |
| Poland Central (Warsaw)/ polandcentral | $1.75 | — | $0.175 |
| Spain Central (Madrid)/ spaincentral | $1.75 | — | $0.175 |
| Sweden Central (Gävle)/ swedencentral | $1.75 | — | $0.193 |
| Switzerland North (Zurich)/ switzerlandnorth | $1.75 | — | $0.175 |
| UK South (London)/ uksouth | $1.75 | — | $0.175 |
| West Europe (Netherlands)/ westeurope | $1.93 | — | $0.175 |
| Middle East | |||
| UAE North (Dubai)/ uaenorth | $1.75 | — | $0.175 |
| South America | |||
| Brazil South (Sao Paulo State)/ brazilsouth | $1.75 | — | $0.175 |
| US | |||
| Central US (Iowa)/ centralus | $1.93 | — | $0.193 |
| East US (Virginia)/ eastus | $1.75 | — | $0.175 |
| East US 2 (Virginia)/ eastus2 | $1.93 | — | $0.175 |
| North Central US (Illinois)/ northcentralus | $1.75 | — | $0.175 |
| South Central US (Texas)/ southcentralus | $1.93 | — | $0.193 |
| West US (California)/ westus | $1.75 | — | $0.193 |
| West US 3 (Phoenix)/ westus3 | $1.75 | — | $0.193 |
Cost Calculator
Preset:
Compares every provider & tier in USD
Versions
| Version | Released | Context | Input / 1M | Output / 1M | Status |
|---|---|---|---|---|---|
| GPT-5.4 Mini | 1.1M | $0.750 | $4.50 | Available | |
| GPT-5.4 Nano | 1.1M | $0.200 | $1.25 | Available | |
| GPT-5.4 | 1.1M | $2.50 | $15.00 | Available | |
| GPT-5.4 Pro | 1.1M | $30.00 | $180.00 | Available | |
| GPT-5.4 3.5 | — | 1.1M | — | — | Available |
| GPT-5.4 Pro 3.5 | — | 1.1M | — | — | Available |
| GPT-5.3 Chat | 128K | $1.75 | $14.00 | Available | |
| GPT-5.3 Codex | 400K | $1.75 | $14.00 | Current | |
| GPT-5.3 Codex Spark | — | 128K | — | — | Available |
| GPT-5.3 Instant | — | 128K | — | — | Available |
| GPT-5.2 Codex | 400K | $1.75 | $14.00 | Available |