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OpenAI: GPT-3.5 Turbo Instruct API Pricing

OpenAI: GPT-3.5 Turbo Instruct is an API model from openai. It costs $1.5 per 1M input tokens and $2 per 1M output tokens. Its context window is 4,095 tokens with up to 3,685 output tokens. A workload of 10M input + 2M output tokens costs about $19 per month.
Input
$1.5
per 1M tokens
Output
$2
per 1M tokens
Cached input
—
per 1M tokens
Context window
4K
4,095 tokens
Blended (80/20)
$1.6
per 1M tokens

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.

How much does OpenAI: GPT-3.5 Turbo Instruct cost for a real workload?

At 10M input + 2M output tokens per month, OpenAI: GPT-3.5 Turbo Instruct costs about $19 ($15 input + $4 output). Try your own volumes in the cost calculator.

What are cheaper alternatives to OpenAI: GPT-3.5 Turbo Instruct?

Where to run OpenAI: GPT-3.5 Turbo Instruct

AI/ML API: one API key for 400+ models, including most models tracked here · Novita AI: pay-as-you-go APIs for open models (DeepSeek, Qwen, Llama and more) plus GPU cloud. Prices there follow each platform's own catalog and can differ from the list prices tracked here.

Run it on AI/ML API →Run it on Novita AI →

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Compare OpenAI: GPT-3.5 Turbo Instruct with other models

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Frequently asked questions

How much does OpenAI: GPT-3.5 Turbo Instruct cost?

OpenAI: GPT-3.5 Turbo Instruct costs $1.5 per 1M input tokens and $2 per 1M output tokens (list price, snapshot October 22, 2026). At 10M input + 2M output tokens per month that is about $19.

What is the context window of OpenAI: GPT-3.5 Turbo Instruct?

OpenAI: GPT-3.5 Turbo Instruct has a context window of 4,095 tokens and can return up to 3,685 output tokens per response.

What are cheaper alternatives to OpenAI: GPT-3.5 Turbo Instruct?

Cheaper models include MoonshotAI: Kimi K2 Thinking ($0.6 in / $2.5 out), MoonshotAI: Kimi K2 0905 ($0.6 in / $2.5 out), Tencent: Hy4 preview ($0.7506 in / $2.251 out). See the full list on this page.

Is OpenAI: GPT-3.5 Turbo Instruct free to use?

No. OpenAI: GPT-3.5 Turbo Instruct is a paid model at $1.5 input / $2 output per 1M tokens. 21 free models are listed on the free models page.

Provider: openai · Model ID: openai/gpt-3.5-turbo-instruct · Modality: text->text · Price snapshot October 22, 2026, refreshed daily. How we collect prices