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GPT-5.1 Codex Mini

Model Information

Display Name: GPT-5.1 Codex Mini

API Model ID: openai/gpt-5.1-codex-mini

Category: Image To Text

Description: GPT-5.1 Codex Mini is the smaller, faster version of GPT-5.1-Codex — OpenAI's line tuned for software engineering, built for interactive development sessions and long, independent execution of engineering tasks. **Key Features:** - 400,000-token context window - Up to 100K output tokens - Multimodal input: text and image - Function/tool calling and structured outputs (JSON schema) - Reasoning with adjustable effort - Low latency and low cost per task **Best For:** - Agentic coding: generating, editing and reviewing code - Tool-driven engineering workflows - Fast iterations where cost per call matters **Note:** optimized to act on code. Prompts that forbid its natural output (e.g. "answer in at most N sentences, without rewriting the code") can make it spend the whole budget reasoning and return nothing.

Context Window: 400,000 tokens

Max Output: 100,000 tokens

How to Use This Model

To use GPT-5.1 Codex Mini via the HInow.ai API, use the model ID: openai/gpt-5.1-codex-mini

API Request Example (Chat/Text)


POST https://api.hinow.ai/v1/chat/completions
Authorization: Bearer YOUR_API_KEY
Content-Type: application/json

{
  "model": "openai/gpt-5.1-codex-mini",
  "messages": [
    {"role": "user", "content": "Your message here"}
  ]
}

API Request Example (Image Generation)


POST https://api.hinow.ai/v1/images
Authorization: Bearer YOUR_API_KEY
Content-Type: application/json

{
  "model": "openai/gpt-5.1-codex-mini",
  "prompt": "Your image description here"
}

Pricing

  • input: $0.375
  • output: $3.00

Available Parameters

  • max_tokens: Max tokens to generate, including reasoning (Options: 512, 1024, 2048, 4096, 8192, 16384, 32768, 65536, 100000)
  • reasoning_effort: Reasoning depth (Options: minimal, low, medium, high)
  • seed: Integer seed for reproducible sampling
  • tools: Function/tool definitions for agentic workflows
  • tool_choice: Controls whether the model calls a tool (Options: auto, none, required)
  • response_format: Output format (structured outputs supported) (Options: text, json_object, json_schema)

Quick Reference

To use this model, set: "model": "openai/gpt-5.1-codex-mini"

Featured: No

Documentation: https://hinow.ai/models/openai/gpt-5.1-codex-mini

API Endpoint: https://api.hinow.ai/v1

Back to Models
GPT-5.1 Codex Mini

GPT-5.1 Codex Mini

openai/gpt-5.1-codex-mini

$0.375 / $3.00
per 1M tokens (in/out)

About

GPT-5.1 Codex Mini is the smaller, faster version of GPT-5.1-Codex — OpenAI's line tuned for software engineering, built for interactive development sessions and long, independent execution of engineering tasks.

Key Features:

  • 400,000-token context window
  • Up to 100K output tokens
  • Multimodal input: text and image
  • Function/tool calling and structured outputs (JSON schema)
  • Reasoning with adjustable effort
  • Low latency and low cost per task

Best For:

  • Agentic coding: generating, editing and reviewing code
  • Tool-driven engineering workflows
  • Fast iterations where cost per call matters

Note: optimized to act on code. Prompts that forbid its natural output
(e.g. "answer in at most N sentences, without rewriting the code") can make it
spend the whole budget reasoning and return nothing.

Capabilities

Image To TextText To Text
Context400K tokens
Max Output100K tokens

Parameters

max_tokens

Max tokens to generate, including reasoning

5121024204840968192163843276865536100000
reasoning_effort

Reasoning depth

minimallowmediumhigh
seed

Integer seed for reproducible sampling

tools

Function/tool definitions for agentic workflows

tool_choice

Controls whether the model calls a tool

autononerequired
response_format

Output format (structured outputs supported)

textjson_objectjson_schema

Code Examples

curl -X POST https://api.hinow.ai/v1/chat/completions \
  -H "Content-Type: application/json" \
  -H "Authorization: Bearer $HINOW_API_KEY" \
  -d '{
    "model": "openai/gpt-5.1-codex-mini",
    "messages": [
      {
        "role": "user",
        "content": [
          {"type": "text", "text": "Describe this image"},
          {"type": "image_url", "image_url": {"url": "https://example.com/image.jpg"}}
        ]
      }
    ],
    "parameters": {
      "max_tokens": "512",
      "reasoning_effort": "minimal",
      "seed": "",
      "tools": "",
      "tool_choice": "auto",
      "response_format": "text"
    }
  }'