GPT-5.3 Codex API Pricing
GPT-5.3 Codex by OpenAI costs $1.75 per million input tokens and $14.00 per million output tokens.
Price verified from OpenAI's pricing page.
Rates and limits
- Input / 1M
- $1.75
- Output / 1M
- $14.00
- Cached input / 1M
- $0.175
- Batch discount
- None
- Context window
- 400K tokens
- Released
- July 2025
What GPT-5.3 Codex costs per month
Token volume split 3:1 between input and output, with no prompt caching.
| Tokens per month | Input / output | Standard |
|---|---|---|
| 1M | 750K / 250K | $4.81 |
| 10M | 7.5M / 2.5M | $48.13 |
| 100M | 75M / 25M | $481.25 |
Where to run GPT-5.3 Codex
Prices above are OpenAI's direct rates. Cloud platforms can charge differently; the cloud platform view compares them.
- OpenAI APIDirect API
- OpenRouterCloud / platform
GPT-5.3 Codex pricing FAQ
How much does GPT-5.3 Codex cost per million tokens?
GPT-5.3 Codex costs $1.75 per million input tokens and $14.00 per million output tokens, as listed on OpenAI's pricing page on September 30, 2026.
How much does GPT-5.3 Codex cost for 10 million tokens a month?
About $48.13 a month, assuming 7.5 million input and 2.5 million output tokens with no prompt caching.
What is the context window of GPT-5.3 Codex?
GPT-5.3 Codex accepts up to 400,000 tokens of context.
Does GPT-5.3 Codex support prompt caching?
Yes. Cached input tokens cost $0.175 per million, 90% less than the standard input rate.
Is there a batch discount for GPT-5.3 Codex?
No batch API price is listed for GPT-5.3 Codex.
Where can I use the GPT-5.3 Codex API?
GPT-5.3 Codex is available through OpenAI API and OpenRouter.
Compare with other models
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Prices shown as input / output per million tokens. All model prices · Side-by-side comparison