What is OpenAI: GPT-5.4 Pro's context window?

OpenAI: GPT-5.4 Pro accepts up to 1,050,000 tokens in a single request, and can return up to 128,000 output tokens.

Is there a cheaper OpenRouter model than OpenAI: GPT-5.4 Pro?

Yes. OpenAI: GPT-3.5 Turbo is $0.500 per 1M input tokens versus $30.00 for OpenAI: GPT-5.4 Pro, with a 16,385 token context window.

Where does this OpenAI: GPT-5.4 Pro 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-5.4 Pro pricing

GPT-5.4 Pro is OpenAI's most advanced model, building on GPT-5.4's unified architecture with enhanced reasoning capabilities for complex, high-stakes tasks. OpenAI: GPT-5.4 Pro from OpenRouter costs $30.00 per 1M input tokens and $180.00 per 1M output tokens. Context window 1,050,000 tokens.

API id openai/gpt-5.4-pro · OpenRouter · source · updated 2026-09-25 · general-purpose

$30.00

Input / 1M tokens

$180.00

Output / 1M tokens

—

Cached input / 1M

1.1M

Context window

OpenAI: GPT-5.4 Pro specifications

Provider: OpenRouter
API id: openai/gpt-5.4-pro
Model type: general-purpose
Context window: 1.1M tokens
Max output: 128K tokens
Currency: USD
Price source: Provider API
Last checked: 2026-09-25

gpt-5.4-pro across providers

The same model, priced by every seller we track. Ranked by the cost of 1M input + 1M output tokens, standard tier; savings measured against buying from the vendor directly.

Provider	Input /1M	Cached /1M	Output /1M	1M in + 1M out	vs vendor
OpenAIVendorCheapest	$30.00	—	$180.00	$210.00	—
OpenRouterHostviewing	$30.00	—	$180.00	$210.00	—

What OpenAI: GPT-5.4 Pro costs in practice

Estimated cost at common usage volumes
Workload	Input tokens	Output tokens	Estimated cost
Short chat turn	1,000	500	$0.12
Document summary	50,000	2,000	$1.86
1M tokens in, 200K out	1,000,000	200,000	$66.00

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-5.4 Pro cost per 1M tokens?: OpenAI: GPT-5.4 Pro costs $30.00 per 1M input tokens and $180.00 per 1M output tokens on the standard tier.
What is OpenAI: GPT-5.4 Pro's context window?: OpenAI: GPT-5.4 Pro accepts up to 1,050,000 tokens in a single request, and can return up to 128,000 output tokens.
Is there a cheaper OpenRouter model than OpenAI: GPT-5.4 Pro?: Yes. OpenAI: GPT-3.5 Turbo is $0.500 per 1M input tokens versus $30.00 for OpenAI: GPT-5.4 Pro, with a 16,385 token context window.
Where does this OpenAI: GPT-5.4 Pro 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.

Head-to-head comparisons

Compare OpenAI: GPT-5.4 Pro with another model →

Other OpenRouter models

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