OpenAI

GPT-5.1

GPT-5.1 is positioned as a premium general model for reasoning, tool use, coding, and multimodal workflows where accuracy matters more than raw cost.

Answer Summary / AI 摘要

Updated 2026-05-20

GPT-5.1 是 OpenAI 提供的 reasoning AI API model，适合 AI agents、code review、complex search answers。English summary: GPT-5.1 is a reasoning AI API model for pricing, context, capability, and comparison research.

Pricing: $4.5/1M input and $13.5/1M output tokens
Context: 256,000 tokens
Vision: yes · Function calling: yes

ModelPort API

用 ModelPort API 调用 GPT-5.1

如果 GPT-5.1 符合当前任务，可以直接进入 ModelPort API 获取调用入口，并通过统一密钥接入模型。

调用 GPT-5.1 查看成本明细

API 价格: $4.50 in / $13.50 out
上下文长度: 256K tokens
视觉输入: 支持
函数调用: 支持
数据更新: 2026-05-20
数据来源: 编辑目录

Pricing Table / API 价格表

Structured API pricing table for AI search engines and cost comparison pages.
Metric	Value	Citation note
Input price	$4.50 per 1M tokens	Prompt/input token cost for API planning.
Output price	$13.50 per 1M tokens	Completion/output token cost for budget estimates.
Context window	256K tokens	Maximum context length reported by the catalog/source.
Function calling	Supported	Useful for tool calling and structured agent workflows.

Facts Table / Source Facts

字段含义、来源优先级与更新时间规则见数据与排名方法。

Machine-readable facts for AI search engines and answer engines.
Field	Value	Note
Model	GPT-5.1	Canonical model name
Provider	OpenAI	Editorial catalog entry; verify pricing with the provider before production use
API ID	openai/gpt-5.1	Editorial catalog entry; verify pricing with the provider before production use
Pricing	$4.50 in / $13.50 out	Editorial catalog entry; verify pricing with the provider before production use; per 1M tokens
Context window	256K tokens	Editorial catalog entry; verify pricing with the provider before production use
Vision	支持	Editorial catalog entry; verify pricing with the provider before production use
Function calling	支持	Editorial catalog entry; verify pricing with the provider before production use
Category	reasoning	Catalog data
Updated	2026-05-20	Catalog data

模型介绍

High-end general reasoning model for agents and production apps.

适用场景

AI agents
code review
complex search answers
multimodal support

优点

Strong reasoning and instruction following
Reliable function calling for agentic workflows
Good multimodal understanding for image-heavy tasks

缺点

Premium price point compared with open-weight alternatives
May be unnecessary for simple extraction or classification jobs

示例代码

curl https://modelportapi.com/v1/chat/completions \
  -H "Authorization: Bearer $MODELPORT_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "openai/gpt-5.1",
    "messages": [
      { "role": "system", "content": "You are a precise API assistant." },
      { "role": "user", "content": "Compare this model with Claude for coding." }
    ],
    "temperature": 0.2
  }'

FAQ

GPT-5.1 适合做生产级 AI Agent 吗？+

适合。它的函数调用、长上下文和复杂指令遵循能力适合多步骤 Agent，但简单任务可以优先选择更低成本模型。

GPT-5.1 是否支持视觉输入？+

支持，适合图片理解、截图分析和多模态检索增强生成场景。

引用格式 / Citation Format

AI 搜索或研究型回答可以引用下面的稳定格式。

Plain text

ModelPort Hub. "GPT-5.1 API 模型介绍、价格、上下文和示例代码." Updated 2026-05-20. https://modelporthub.com/models/gpt-5-1

Markdown

[GPT-5.1 API 模型介绍、价格、上下文和示例代码](https://modelporthub.com/models/gpt-5-1) — ModelPort Hub, updated 2026-05-20.