OpenAI: GPT-5.1-Codex-Mini✓ Catalog verified
GPT-5.1-Codex-Mini is a smaller and faster version of GPT-5.1-Codex
Overview
GPT-5.1-Codex-Mini is a smaller and faster version of GPT-5.1-Codex
Access: available through the official OpenAI API. Context window: 400K.
Specifications
| API identifier | openai/gpt-5.1-codex-mini |
| Provider | OpenAI |
| Model type | Multimodal LLM |
| Context window | 400K catalog |
| Input modalities | image · text |
| Output modalities | text |
| Released | Nov 13, 2025 |
| Tokenizer | GPT |
| Moderated | Yes |
| Architecture modality | text+image->text |
API defaults
{
"top_k": null,
"top_p": null,
"temperature": null,
"presence_penalty": null,
"frequency_penalty": null,
"repetition_penalty": null
}Pricing
Live pricing components for openai/gpt-5.1-codex-mini as published in the catalog.
| Pricing component | Raw unit price | Normalized | Unit |
|---|---|---|---|
| Prompt tokens | $2.5e-7 | $0.25 / 1M | Per input token |
| Completion tokens | $0.000002 | $2.00 / 1M | Per output token |
| Request fee | N/A | N/A | Per request |
| Image fee | N/A | N/A | Per image unit |
| Web search fee | N/A | N/A | Per search request |
Cost calculator
Estimate monthly spend from your own token volumes.
Estimated Total Cost
$0.53Calculated from current list pricing in the ModelsAtlas catalog.Capabilities
| Capability | Status | What it means |
|---|---|---|
| Visual Understanding | ✓ Supported | Image and document analysis support |
| Audio Processing | Not advertised | Speech and voice aligned flows |
| Tool Calling | ✓ Supported | Supports tools / function calling |
| Self-Hosting | Not advertised | Deploy outside managed APIs |
Capability signals
Directional signals derived from model metadata and capability tags — not official benchmark submissions.
Quick start
Call OpenAI: GPT-5.1-Codex-Mini through an OpenAI-compatible client.
from openai import OpenAI
client = OpenAI(
base_url="https://openrouter.ai/api/v1",
api_key="YOUR_API_KEY"
)
response = client.chat.completions.create(
model="openai/gpt-5.1-codex-mini",
messages=[{"role": "user", "content": "Explain quantum physics."}]
)
print(response.choices[0].message.content)Alternatives
Closest models by context window from a different provider.
| Model | Provider | Context | Input /1M | Actions |
|---|---|---|---|---|
| Meta: Llama 4 Scout | Meta | 328K | $0.08 | View → |
| Amazon: Nova Lite 1.0 | Amazon | 300K | $0.06 | View → |
Head-to-head comparisons
Side-by-side breakdowns of OpenAI: GPT-5.1-Codex-Mini against other frontier models.
Sources & attribution
Pricing and metadata are maintained in the ModelsAtlas catalog.
Frequently asked questions
How much does OpenAI: GPT-5.1-Codex-Mini cost?
$0.25 per 1M input tokens and $2.00 per 1M output tokens on the official OpenAI API.
What is the context window of OpenAI: GPT-5.1-Codex-Mini?
OpenAI: GPT-5.1-Codex-Mini supports up to 400K tokens of context.
Does OpenAI: GPT-5.1-Codex-Mini support tool / function calling?
Yes, OpenAI: GPT-5.1-Codex-Mini supports tool / function calling — you can register tools and the model will emit structured tool calls.
How do I access OpenAI: GPT-5.1-Codex-Mini?
Use the official OpenAI API with the model id `openai/gpt-5.1-codex-mini`. See the Quick start section above for code examples.