OpenAI
GPT-5.3-Codex
model
gpt-5-3-codexMidStableStreamingToolsBatchLong contextGlobal
Context
400K
Input / 1M tokens
$1.75
Output / 1M tokens
$14.00
Cached input / 1M tokens
$0.4113
Cache write / 1M tokens
— (bills at input price)
About this model
GPT-5.3-Codex
GPT-5.3-Codex is a model by OpenAI, available through the Anoman AI OpenAI-compatible API with a 400K-token context window. It costs $1.75 per 1M input tokens and $14.00 per 1M output tokens, and is available from the Pro plan.
Key facts
- Maker
- OpenAI
- Context window
- 400K tokens
- Max output
- 128K tokens
- Lane
- Guarded: the provider has confirmed it does not train on your data
- Modality
- Text
- Input price
- $1.75 per 1M tokens
- Output price
- $14.00 per 1M tokens
- Processing region(s)
- global
- Route
- Via OpenRouter
- Cheapest plan
- Available from the Pro plan
- Price comparison
- Priced below 35 of 250 pro-band guarded models on Anoman (blended price: 1 part input to 3 parts output).
Ways to call
Ways to call GPT-5.3-Codex
Each model ID below is callable through the Anoman AI API. Price and processing region depend on the route.
| Model ID | Route | Input / output per 1M tokens | Region(s) | Lane | Context |
|---|---|---|---|---|---|
| gpt-5-3-codex | Via OpenRouter | $1.75 / $14.00 | global | Guarded | 400K |
| gpt-5.3-codex | Via OpenAI's API | $1.75 / $14.00 | us | Guarded | 272K |
Code example
Chat completion with GPT-5.3-Codex
from openai import OpenAI
client = OpenAI(
base_url="https://api.anoman.io/v1",
api_key="anm-sk-..."
)
response = client.chat.completions.create(
model="gpt-5-3-codex",
messages=[{"role": "user", "content": "Hello!"}]
)
print(response.choices[0].message.content)Alternatives
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