OpenAI: GPT-4.1

openai/gpt-4.1

Created Apr 14, 20251,047,576 context
Starting at $2/M input tokensStarting at $8/M output tokens

GPT-4.1 is a flagship large language model optimized for advanced instruction following, real-world software engineering, and long-context reasoning. It supports a 1 million token context window and outperforms GPT-4o and GPT-4.5 across coding (54.6% SWE-bench Verified), instruction compliance (87.4% IFEval), and multimodal understanding benchmarks. It is tuned for precise code diffs, agent reliability, and high recall in large document contexts, making it ideal for agents, IDE tooling, and enterprise knowledge retrieval.

Providers for GPT-4.1

OpenRouter routes requests to the best providers that are able to handle your prompt size and parameters, with fallbacks to maximize uptime.

Context
1.05M
Max Output
33K
Input
$2
Output
$8

Apps using GPT-4.1

Top public apps this week using this model

1.
Favicon for https://cline.bot/
Cline
Autonomous coding agent right in your IDE
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2.
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Roo Code
A whole dev team of AI agents in your editor
4.15Btokens
3.
Favicon for https://litellm.ai/
liteLLM
Open-source library to simplify LLM calls
580Mtokens
4.
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New API
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5.
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OpenRouter: Chatroom
Chat with multiple LLMs at once
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6.
Favicon for https://math-gpt.org/
MathGPT
Instant homework help from your personal AI math solver
454Mtokens
7.
Favicon for https://xline.askman.dev/
Xline
new
322Mtokens
8.
Favicon for https://bothub.chat/
BotHub
Multi-model ChatGPT
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9.
Favicon for https://kortex.co/
Kortex
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10.
Favicon for https://openwebui.com/
Open WebUI
Extensible, self-hosted AI interface
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11.
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SillyTavern
LLM frontend for power users
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12.
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ThrustWorthy - Position Manager
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13.
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Aider
AI pair programming in your terminal
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14.
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RA.Aid
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15.
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Kilo Code
new
178Mtokens
16.
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Infinite Worlds
Build your own adventures, share them with friends
160Mtokens
17.
Favicon for https://5050pro.jp/
5050pro.jp
new
70.1Mtokens
18.
Favicon for https://librechat.ai/
LibreChat
Feature-rich, open-source ChatGPT clone
68.9Mtokens
19.
Favicon for https://local-operator.com/
Local Operator
AI agents on your device
58.6Mtokens
20.
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Chub AI
GenAI for everyone
57.8Mtokens

Recent activity on GPT-4.1

Tokens processed per day

Apr 14Apr 17Apr 20Apr 23Apr 26Apr 29May 2May 5May 8May 11May 1402.5B5B7.5B10B

Uptime stats for GPT-4.1

Uptime stats for GPT-4.1 on the only provider

When an error occurs in an upstream provider, we can recover by routing to another healthy provider, if your request filters allow it.

Learn more about our load balancing and customization options.

Sample code and API for GPT-4.1

OpenRouter normalizes requests and responses across providers for you.

OpenRouter provides an OpenAI-compatible completion API to 300+ models & providers that you can call directly, or using the OpenAI SDK. Additionally, some third-party SDKs are available.

In the examples below, the OpenRouter-specific headers are optional. Setting them allows your app to appear on the OpenRouter leaderboards.

from openai import OpenAI

client = OpenAI(
  base_url="https://openrouter.ai/api/v1",
  api_key="<OPENROUTER_API_KEY>",
)

completion = client.chat.completions.create(
  extra_headers={
    "HTTP-Referer": "<YOUR_SITE_URL>", # Optional. Site URL for rankings on openrouter.ai.
    "X-Title": "<YOUR_SITE_NAME>", # Optional. Site title for rankings on openrouter.ai.
  },
  extra_body={},
  model="openai/gpt-4.1",
  messages=[
    {
      "role": "user",
      "content": [
        {
          "type": "text",
          "text": "What is in this image?"
        },
        {
          "type": "image_url",
          "image_url": {
            "url": "https://upload.wikimedia.org/wikipedia/commons/thumb/d/dd/Gfp-wisconsin-madison-the-nature-boardwalk.jpg/2560px-Gfp-wisconsin-madison-the-nature-boardwalk.jpg"
          }
        }
      ]
    }
  ]
)
print(completion.choices[0].message.content)

Using third-party SDKs

For information about using third-party SDKs and frameworks with OpenRouter, please see our frameworks documentation.

See the Request docs for all possible fields, and Parameters for explanations of specific sampling parameters.

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    GPT-4.1 - API, Providers, Stats | OpenRouter