Pricing · OpenAI
GPT-5.3 Codex
OpenAI's gpt-5.3-codex, 400K tokens of context. Every number on this page was read off OpenAI's own pricing
page — never estimated, never recalled from memory.
How OpenAI describes it
“GPT-5.3-Codex is optimized for agentic coding tasks in Codex or similar environments.”
Pricing
| Input | $1.75 | per 1M tokens |
|---|---|---|
| Output | $14.00 | per 1M tokens |
| Cached input | $0.175 | per 1M tokens · 0.1× the input price |
At the calculator's starting volume, 1M input tokens and 200K output tokens with no cache hits, GPT-5.3 Codex costs $4.55: $1.75 for input and $2.80 for output, at the prices above. Same formula as the calculator; change the volume there.
Where this price sits
$1.75 per 1M input tokens is the 38th cheapest input price of the 67 current models with a verified price on this site, and the 3rd of OpenAI's 11. Output costs 8.0× the input price.
Mentioned in
One post on this site cites GPT-5.3 Codex. The sentence is the post's own, taken from where it links here.
-
Prompt Caching Is Not 10% Everywhere: What a Cache Hit Costs Across Eight Providers · September 16, 2026
OpenAI, all eight current models: GPT-6 Astra $1.00 on $10.00, GPT-5.6 Sol $0.40 on $4.00, Terra $0.20 on $2.00, Luna $0.02 on $0.20, GPT-5.3 Codex $0.175 on $1.75, ChatGPT (chat-latest) $0.50 on $5.00, GPT-5.6 Cyber $1.25 on $12.50 and the access-restricted GPT-Rosalind $0.50 on $5.00, verified September 14, 2026, and September 16 for Astra and Rosalind.
Specifications
| API model id | gpt-5.3-codex | |
|---|---|---|
| Provider | OpenAI | |
| Family | Codex | |
| Context window | 400K tokens | |
| Max output | 128K tokens | |
| Status | Current | |
| Intended use | coding | |
It returns up to 128K tokens per response, against a context window of 400K tokens. OpenAI lists its intended use as coding.
Questions about GPT-5.3 Codex pricing
- How much does GPT-5.3 Codex cost per million tokens?
- $1.75 per 1M input tokens and $14.00 per 1M output tokens, read on OpenAI's official pricing page on September 28, 2026.
- What does a cached input token cost on GPT-5.3 Codex?
- $0.175 per 1M cached input tokens, 10% of the $1.75 input price.
Verified September 28, 2026 against OpenAI's official pricing page. Confidence: confirmed. No price change recorded for this model. How the data is checked.
Other OpenAI models with a verified price
- GPT-6 Luna GPT-6 $0.10 in · $0.50 out
- GPT-5.6 Luna GPT-5.6 $0.20 in · $1.20 out
- GPT-6.1 Sol GPT-6 $2.00 in · $10.00 out
- GPT-6 Sol GPT-6 $2.00 in · $10.00 out
- GPT-5.6 Terra GPT-5.6 $2.00 in · $12.00 out
- GPT-5.6 Sol GPT-5.6 $4.00 in · $20.00 out · promo
- GPT-Rosalind GPT-Rosalind $5.00 in · $25.00 out
- ChatGPT (chat-latest) GPT $5.00 in · $30.00 out
- GPT-6 Astra GPT-6 $10.00 in · $50.00 out
- GPT-5.6 Cyber GPT-5.6 $12.50 in · $75.00 out
Cheaper or equally priced alternatives
Current models with an input price at or below $1.75 per 1M tokens.
- Gemini 3.5 Flash Google $1.50 in · $9.00 out
- Mistral Medium 3.5 Mistral $1.50 in · $7.50 out
- GLM 5.2 Mistral $1.40 in · $4.40 out
- GLM 5.3 Mistral $1.40 in · $4.40 out
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