What is OpenAI: GPT-3.5 Turbo 16k's context window?

OpenAI: GPT-3.5 Turbo 16k accepts up to 16,385 tokens in a single request, and can return up to 4,096 output tokens.

Is there a cheaper OpenRouter model than OpenAI: GPT-3.5 Turbo 16k?

Yes. OpenAI: GPT-3.5 Turbo is $0.500 per 1M input tokens versus $3.00 for OpenAI: GPT-3.5 Turbo 16k, with a 16,385 token context window.

Where does this OpenAI: GPT-3.5 Turbo 16k 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-3.5 Turbo 16k pricing

This model offers four times the context length of gpt-3.5-turbo, allowing it to support approximately 20 pages of text in a single request at a higher cost. OpenAI: GPT-3.5 Turbo 16k from OpenRouter costs $3.00 per 1M input tokens and $4.00 per 1M output tokens. Context window 16,385 tokens.

API id openai/gpt-3.5-turbo-16k · OpenRouter · source · updated 2026-09-25 · general-purpose

$3.00

Input / 1M tokens

$4.00

Output / 1M tokens

—

Cached input / 1M

16K

Context window

OpenAI: GPT-3.5 Turbo 16k specifications

Provider: OpenRouter
API id: openai/gpt-3.5-turbo-16k
Model type: general-purpose
Context window: 16K tokens
Max output: 4K tokens
Currency: USD
Price source: Provider API
Last checked: 2026-09-25

What OpenAI: GPT-3.5 Turbo 16k costs in practice

Estimated cost at common usage volumes
Workload	Input tokens	Output tokens	Estimated cost
Short chat turn	1,000	500	$0.0050
Document summary	50,000	2,000	$0.16
1M tokens in, 200K out	1,000,000	200,000	$3.80

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-3.5 Turbo 16k cost per 1M tokens?: OpenAI: GPT-3.5 Turbo 16k costs $3.00 per 1M input tokens and $4.00 per 1M output tokens on the standard tier.
What is OpenAI: GPT-3.5 Turbo 16k's context window?: OpenAI: GPT-3.5 Turbo 16k accepts up to 16,385 tokens in a single request, and can return up to 4,096 output tokens.
Is there a cheaper OpenRouter model than OpenAI: GPT-3.5 Turbo 16k?: Yes. OpenAI: GPT-3.5 Turbo is $0.500 per 1M input tokens versus $3.00 for OpenAI: GPT-3.5 Turbo 16k, with a 16,385 token context window.
Where does this OpenAI: GPT-3.5 Turbo 16k 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-3.5 Turbo 16k specifications

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What OpenAI: GPT-3.5 Turbo 16k costs in practice

Common questions

Head-to-head comparisons

Other OpenRouter models