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

OpenAI: GPT-3.5 Turbo Instruct accepts up to 4,095 tokens in a single request, and can return up to 3,685 output tokens.

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

Yes. OpenAI: GPT-3.5 Turbo is $0.500 per 1M input tokens versus $1.50 for OpenAI: GPT-3.5 Turbo Instruct, with a 16,385 token context window.

Where does this OpenAI: GPT-3.5 Turbo Instruct 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 Instruct pricing

This model is a variant of GPT-3.5 Turbo tuned for instructional prompts and omitting chat-related optimizations. Training data: up to Sep 2021. OpenAI: GPT-3.5 Turbo Instruct from OpenRouter costs $1.50 per 1M input tokens and $2.00 per 1M output tokens. Context window 4,095 tokens.

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

$1.50

Input / 1M tokens

$2.00

Output / 1M tokens

—

Cached input / 1M

Context window

OpenAI: GPT-3.5 Turbo Instruct specifications

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

gpt-3.5-turbo-instruct 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	$1.50	—	$2.00	$3.50	—
OpenRouterHostviewing	$1.50	—	$2.00	$3.50	—

What OpenAI: GPT-3.5 Turbo Instruct costs in practice

Estimated cost at common usage volumes
Workload	Input tokens	Output tokens	Estimated cost
Short chat turn	1,000	500	$0.0025
Document summary	50,000	2,000	$0.08
1M tokens in, 200K out	1,000,000	200,000	$1.90

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 Instruct cost per 1M tokens?: OpenAI: GPT-3.5 Turbo Instruct costs $1.50 per 1M input tokens and $2.00 per 1M output tokens on the standard tier.
What is OpenAI: GPT-3.5 Turbo Instruct's context window?: OpenAI: GPT-3.5 Turbo Instruct accepts up to 4,095 tokens in a single request, and can return up to 3,685 output tokens.
Is there a cheaper OpenRouter model than OpenAI: GPT-3.5 Turbo Instruct?: Yes. OpenAI: GPT-3.5 Turbo is $0.500 per 1M input tokens versus $1.50 for OpenAI: GPT-3.5 Turbo Instruct, with a 16,385 token context window.
Where does this OpenAI: GPT-3.5 Turbo Instruct 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

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Other OpenRouter models

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