Model Cost Profile

OpenAI: GPT-4o (extended)

Developer: openai

Pricing updated Mar 11, 2026

Input rank: #321Output rank: #319

Live Pricing

Input: $6.00

Output: $18.00

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Pricing via OpenRouter API · Last synced Mar 11, 2026

OpenAI's GPT-4o (extended) model features an impressive context window of 128,000 tokens, making it ideal for applications requiring extensive text generation and analysis, such as legal document review and long-form content creation. Teams utilizing this API can expect an input cost of $6.00 per million tokens and an output cost of $18.00 per million tokens, which can significantly impact budget considerations for high-volume projects. This model's expansive context size allows for deeper understanding and continuity in conversations, enhancing user experience in customer support and interactive applications.

👁 Vision🔧 Tool Calling📋 Structured Output

Context Window

128,000

Tokens

Input Price / 1M

$6.00

Prompt tokens

Output Price / 1M

$18.00

Completion tokens

Intelligence (MMLU)

Benchmark Pending

Massive Multitask Language Understanding

Side-by-Side Pricing Table

Usage Type	Price / 1M Tokens
Input (Prompt)	$6.00
Output (Completion)	$18.00

Compare with OpenAI: GPT-4o (2024-05-13)Compare with Anthropic: Claude 3.5 Sonnet Compare with Anthropic: Claude Opus 4.5

Price History

OpenAI: GPT-4o (extended) Pricing Trend

Input / 1M tokens0.0%Output / 1M tokens0.0%

Mar 7 — Mar 11

Current Input / 1M

$6.00

Current Output / 1M

$18.00

Cost Calculator

Estimate monthly spend for OpenAI: GPT-4o (extended) based on your workload.

Input tokens / month

01.0B

Output tokens / month

0500M

Estimated Monthly Cost

$366

25M input + 12M output tokens

Same Workload on Other Models

Arcee AI: Trinity Large Preview (free)$0.00−$366 Arcee AI: Trinity Mini (free)$0.00−$366 Google: Gemma 3 12B (free)$0.00−$366 Google: Gemma 3 27B (free)$0.00−$366

Cheaper Alternatives to Compare

Quick links for cost-down decisions before production rollout.

OpenAI: GPT-4o (extended) vs Arcee AI: Trinity Large Preview (free)OpenAI: GPT-4o (extended) vs Arcee AI: Trinity Mini (free)OpenAI: GPT-4o (extended) vs Google: Gemma 3 12B (free)OpenAI: GPT-4o (extended) vs Google: Gemma 3 27B (free)

FAQ

Common pricing and benchmark questions for OpenAI: GPT-4o (extended).

How much does OpenAI: GPT-4o (extended) cost per 1M input tokens?

OpenAI: GPT-4o (extended) input pricing is $6.00 per 1M tokens based on the latest synced provider data.

How much does OpenAI: GPT-4o (extended) cost per 1M output tokens?

OpenAI: GPT-4o (extended) output pricing is $18.00 per 1M tokens based on the latest synced provider data.

What context window does OpenAI: GPT-4o (extended) support?

OpenAI: GPT-4o (extended) supports a context window of 128,000 tokens.

How can I compare OpenAI: GPT-4o (extended) with cheaper alternatives?

Use the comparison links on this page to open direct model-vs-model pricing and benchmark pages, then evaluate monthly spend projections for your workload.