prices synced 2026-10-27

GPT-3.5 Turbo Instruct

OpenAI · Released Sep 2023

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GPT-3.5 Turbo Instruct is OpenAI's lightweight language model designed for instruction-following tasks with a 4K token context window.

Strengths
It handles instruction-based prompts and completions efficiently, excelling at following explicit directives without the overhead of chat-format architecture.
Best for
Completion-based workloads and instruction-following tasks where chat format is unnecessary and context constraints are not a limiting factor.
Limitations
The 4K token context window is smaller than GPT-3.5 Turbo (16K), and instruction-focused design makes it less suitable for multi-turn conversation patterns.

Input / 1M

$1.50

Output / 1M

$2.00

Cached input / 1M

—

Context window

4K

Price history

Price per 1M tokens over timeOutput $2.00; Input $1.50 as of Jun 2026.$0$0.5$1.00$1.50$2.00Output on 11 Jun 2026: $2.00Out $2.00Input on 11 Jun 2026: $1.50In $1.50Jun 2026

Snapshots

Effective Input Output Cached in Note Source
11 Jun 2026 $1.50 $2.00 — Imported from OpenRouter openrouter.ai

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