OpenAI: GPT-4.1

openai/gpt-4.1

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...

Modalities

In / out price

$2 / $8 per 1M

Context

1.05M

Released

Apr 14, 2025

Why use GPT-4.1

Understands images
Reads PDFs and other files
Tool and function calling (agent-ready)
Structured (JSON) outputs
Very long context: whole books or codebases in one prompt

Pricing

Input	$2 / 1M tokens
Output	$8 / 1M tokens
Cached input (read)	$0.5 / 1M tokens

List prices via OpenRouter, checked daily. Real cost depends on the provider and on reasoning tokens.

Cost calculator

Pick a task, set how often you run it, and compare what it costs on each model.

TaskInput tokens≈ 602 wordsOutput tokens≈ 1,504 wordsRuns per month

Input served from cache: 0%Repeated prompts (same instructions or document) are billed at the cheaper cache-read price where the model supports it.

Model	Per run	Per month	Per 1,000 runs
OpenAI: GPT-4.1	$0.018	$17.60	$17.60

Estimates from list prices via OpenRouter; real bills vary by provider and reasoning tokens.

Will it fit? Context window simulator

Each square is about one page (500 words). Colored squares are your content; grey squares are free space in the model's context window.

Your content

Novel (90,000 words)

Total: about 120,000 tokens (≈ 90,226 words). Token counts are estimates.

Models

Zoom (square size): 6pxZoom out to see a whole million-token window at once.

OpenAI: GPT-4.1

1,047,576 tokens ≈ 1,576 pages

Fits: uses 11% of the window (room for 8× this much).

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Why use GPT-4.1

Pricing

Cost calculator

Will it fit? Context window simulator

OpenAI: GPT-4.1

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