GPT-5.1

OpenAI chatvisionreasoningtool_use Long

API ID: openai/gpt-5.1-20251113

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Input Price
$1.25
/1M tokens
Output Price
$10.00
/1M tokens

About GPT-5.1

GPT-5.1 is OpenAI's enhanced version of GPT-5, introducing improvements across all capabilities. The model delivers better reasoning, coding, and creative performance while maintaining GPT-5's advanced features. GPT-5.1 includes specialized variants for different use cases including chat, codex, and image generation. It represents OpenAI's continued iteration on their flagship model. For applications requiring the latest OpenAI capability, GPT-5.1 offers cutting-edge performance.

💰
Price Ranking
#893 lowest price among 950 Chat models

Model Specifications

Context Length
400k
Max Output
128k
Release Date
2025-11-13
Capabilities
chat vision reasoning tool_use
Input Modalities
imagetextfile
Output Modalities
text

Best For

  • Complex reasoning, math problems, multi-step logic
  • Image analysis, document understanding, visual Q&A
  • Conversations, content writing, general assistance

Consider Alternatives For

  • Simple Q&A (cheaper models available)

💰 Real-World Cost Examples

Estimated monthly costs for common use cases

Personal AI Assistant
$3.56
/month
50 conversations/day, ~500 tokens each
Customer Service Bot
$108.75
/month
1000 tickets/day, ~800 tokens each
Data Analysis Pipeline
$148.13
/month
500 analyses/day, ~2k tokens each
Calculate Your Custom Usage

OpenAI Model Lineup

Compare all models from OpenAI to find the best fit

Model Input Output Context Capabilities
GPT-5.1 Current Free Free 400k chat vision reasoning tool_use
GPT-3.5 Turbo 16k (older v1106) Free Free 16k chat
GPT-3.5 Turbo 16k (older v1106) Free Free 16k chat
GPT-4 32k Free Free 33k chat
GPT-4 32k Free Free 33k chat
GPT-4 32k (older v0314) Free Free 33k chat
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🚀 Quick Start

Get started with GPT-5.1 API

OpenAI Python SDK 
from openai import OpenAI
client = OpenAI()

response = client.chat.completions.create(
    model="openai/gpt-5.1-20251113",
    messages=[
        {"role": "user", "content": "Hello!"}
    ]
)
print(response.choices[0].message.content)

Resources

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