GPT-3.5 Turbo Instruct
OpenAI · Released Sep 2023
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
Snapshots
| Effective | Input | Output | Cached in | Note | Source |
|---|---|---|---|---|---|
| 11 Jun 2026 | $1.50 | $2.00 | — | Imported from OpenRouter | openrouter.ai |