What is OpenAI: GPT-4o (2024-05-13)'s context window?

OpenAI: GPT-4o (2024-05-13) accepts up to 128,000 tokens in a single request, and can return up to 4,096 output tokens.

Is there a cheaper OpenRouter model than OpenAI: GPT-4o (2024-05-13)?

Yes. Free Models Router is free per 1M input tokens versus $5.00 for OpenAI: GPT-4o (2024-05-13), with a 200,000 token context window.

Where does this OpenAI: GPT-4o (2024-05-13) price come from?

From the OpenRouter catalogue, because OpenRouter does not publish machine-readable pricing. OpenRouter is a reseller, so its rate can differ from OpenRouter's own — verify before committing spend.

OpenAI: GPT-4o (2024-05-13) pricing

GPT-4o ("o" for "omni") is OpenAI's latest AI model, supporting both text and image inputs with text outputs. OpenAI: GPT-4o (2024-05-13) from OpenRouter costs $5.00 per 1M input tokens and $15.00 per 1M output tokens. Context window 128,000 tokens.

API id openai/gpt-4o-2024-05-13 · OpenRouter · source · updated 2026-11-10 · general-purpose

$5.00

Input / 1M tokens

$15.00

Output / 1M tokens

—

Cached input / 1M

128K

Context window

OpenAI: GPT-4o (2024-05-13) specifications

Provider: OpenRouter
API id: openai/gpt-4o-2024-05-13
Model type: general-purpose
Context window: 128K tokens
Max output: 4K tokens
Currency: USD
Price source: Provider API
Last checked: 2026-11-10

What OpenAI: GPT-4o (2024-05-13) costs in practice

Estimated cost at common usage volumes
Workload	Input tokens	Output tokens	Estimated cost
Short chat turn	1,000	500	$0.01
Document summary	50,000	2,000	$0.28
1M tokens in, 200K out	1,000,000	200,000	$8.00

Estimates use the standard tier and ignore caching discounts, so real bills with repeated prompt prefixes are typically lower.

Common questions

How much does OpenAI: GPT-4o (2024-05-13) cost per 1M tokens?: OpenAI: GPT-4o (2024-05-13) costs $5.00 per 1M input tokens and $15.00 per 1M output tokens on the standard tier.
What is OpenAI: GPT-4o (2024-05-13)'s context window?: OpenAI: GPT-4o (2024-05-13) accepts up to 128,000 tokens in a single request, and can return up to 4,096 output tokens.
Is there a cheaper OpenRouter model than OpenAI: GPT-4o (2024-05-13)?: Yes. Free Models Router is free per 1M input tokens versus $5.00 for OpenAI: GPT-4o (2024-05-13), with a 200,000 token context window.
Where does this OpenAI: GPT-4o (2024-05-13) price come from?: From the OpenRouter catalogue, because OpenRouter does not publish machine-readable pricing. OpenRouter is a reseller, so its rate can differ from OpenRouter's own — verify before committing spend.

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OpenAI: GPT-4o (2024-05-13) specifications

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What OpenAI: GPT-4o (2024-05-13) costs in practice

Common questions

Head-to-head comparisons

Other OpenRouter models