Discover OpenAI's GPT-5.1-Codex-Mini Model

This model efficiently processes text and images for versatile output.

Input: image · text Output: text Context: 400,000 tokens Release: 2025-11-13

OpenAI's GPT-5.1-Codex-Mini, released on November 13, 2025, is designed to efficiently process both text and images. With an impressive context window of 400,000 tokens, this model excels in generating coherent text responses based on diverse inputs. It supports various modalities, allowing users to input both text and images, and provides text as output. Key capabilities include frequency penalties, reasoning options, and structured outputs, making it versatile for different applications. Whether you're looking to enhance creative projects or streamline workflows, GPT-5.1-Codex-Mini offers a robust solution for your AI needs.

Use Cases

Here are a few ways teams apply OpenAI: GPT-5.1-Codex-Mini in practice—from fast drafting to multimodal understanding. Adapt these ideas to your workflow.

Enhance creative writing projects

Streamline content generation workflows

Facilitate image-based queries

Support educational tools and resources

Key Features

A quick look at the capabilities that make this model useful in real projects.

Supports text and image inputs

Generates text output

Large context length of 400,000 tokens

Flexible reasoning capabilities

Structured output options

Specs

Overview

Vendor
openai

Model ID
openai/gpt-5.1-codex-mini

Release
2025-11-13

Modalities & context

Input
image · text

Output
text

Context
400,000 tokens

Parameters & defaults

Supported parameters: include_reasoning, max_tokens, reasoning, response_format, seed, structured_outputs, tool_choice, tools

Defaults: temperature 0.2, top_p 0.95

Benchmark tests: OpenAI: GPT-5.1-Codex-Mini

We ran this model against a few representative prompts to show its range. Review the outputs below and be the judge.

Text

Prompt:

Write 150 words on how AI might positively upend work, leisure and creativity

Artificial intelligence can positively upend work, leisure, and creativity by making each sector more adaptive and human-centered. In the workplace it can automate routine chores, analyze data, and flag opportunities so people focus on interpersonal leadership, mentoring, and strategy. Rather than replacing jobs, AI could amplify skills and reduce burnout, turning commutes into flexible hours for community, rest, or deep thinking. During leisure, smart assistants might craft personalized experiences, suggest physical activities calibrated to health metrics, or control immersive environments that relax, teach, or connect us more deeply with distant friends and family. For creativity, AI partners could serve as curiosity engines, proposing surprising combinations, detecting patterns in art or science, and helping novices gain confidence while keeping ultimate judgment human. When thoughtfully governed, AI may invite us to reimagine value, privileging empathy, inclusivity, and purpose in every sphere. Its optimistic surge depends on education, equitable access, and transparent oversight.

Run this prompt on Upend.AI

Image

Prompt:

Generate an SVG of a pelican riding a bicycle.

Run this prompt on Upend.AI

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Chat with GPT-5.1-Codex-Mini

up.end

/ˌəpˈend/

verb

To “upend” means to completely disrupt, overturn, or drastically change the established order or structure of something. It implies a significant shift or alteration that can potentially have far-reaching consequences. When something is upended, it is turned upside down or transformed in a way that challenges conventional norms or expectations. The term often carries a sense of innovation, transformation, and sometimes even a hint of upheaval, indicating that the changes are not just minor adjustments but rather a fundamental reimagining of the status quo.

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