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OpenAI: GPT-3.5 Turbo Instruct

OpenAI

OpenAI: GPT-3.5 Turbo Instruct by OpenAI costs $1.50 per 1M input tokens and $2.00 per 1M output tokens, with a 4K-token context window.

Pricing

Input (per 1M tokens)
$1.50
Output (per 1M tokens)
$2.00
Cached input (per 1M)
—

Specifications

Provider
OpenAI
Context window
4K tokens
Parameters
20B
Released
Sep 2023
Open weights
No
Frontier model
No

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FAQ

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

OpenAI: GPT-3.5 Turbo Instruct is priced at $1.50 per 1M input tokens and $2.00 per 1M output tokens. Output tokens cost more than input.

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

OpenAI: GPT-3.5 Turbo Instruct supports a context window of 4K tokens — the maximum prompt plus response length it can handle in a single request.

Is OpenAI: GPT-3.5 Turbo Instruct open weight?

No — OpenAI: GPT-3.5 Turbo Instruct is a closed/proprietary model accessed via API.

Data as of 2026-10-23. Source: Pricing via OpenRouter API, openrouter.ai. Pricing is per 1M tokens (USD); confirm with the provider before production use.