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GPT 3.5 Turbo Instruct

Legacy$$Standard
OpenAI
CompareChat

Instruction-following variant of GPT-3.5 for completion-style tasks. Optimized for text completion rather than chat. Useful for legacy applications built on the completions API.

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GPT 3.5 Turbo Instruct is competitively priced at $1.50/M tokens input and $2.00/M tokens output. The model supports a 4K context window.

Benchmarks

CodingInsufficient data
AgenticInsufficient data
ReasoningInsufficient data
MathInsufficient data
Sources:Epoch AI·OpenRouter· as of 2026-07-10

Specifications

Vision
Audio
Reasoning
4K
Context
4K
Max output

Performance

Providers

Misc

September 28, 2023
Released
Same family
OpenAIGPT 3.5 TurboOpenAIGPT 3.5 Turbo 16K
CompareChat with GPT 3.5 Turbo Instruct

Compare with

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Frequently Asked Questions about GPT 3.5 Turbo Instruct▼

When was GPT 3.5 Turbo Instruct released?

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GPT 3.5 Turbo Instruct was released on September 28, 2023.

Who created GPT 3.5 Turbo Instruct?

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GPT 3.5 Turbo Instruct was created by OpenAI.

How much does GPT 3.5 Turbo Instruct cost?

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GPT 3.5 Turbo Instruct costs $1.50/M input tokens and $2.00/M output tokens.

What is GPT 3.5 Turbo Instruct API pricing?

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The GPT 3.5 Turbo Instruct API is priced at $1.50 per million input tokens and $2.00 per million output tokens. You can access GPT 3.5 Turbo Instruct through idapt.app alongside 200+ other AI models in one workspace.

Is GPT 3.5 Turbo Instruct a reasoning model?

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No, GPT 3.5 Turbo Instruct is not a reasoning model. It responds directly without an extended internal thinking step. For tasks requiring deep chain-of-thought reasoning, consider models like Claude, o-series from OpenAI, or Gemini Thinking.

Does GPT 3.5 Turbo Instruct support image or vision input?

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No, GPT 3.5 Turbo Instruct does not currently support image or vision input. It is a text-only model.

Does GPT 3.5 Turbo Instruct support audio?

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No, GPT 3.5 Turbo Instruct does not support audio input.

What is the context window of GPT 3.5 Turbo Instruct?

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GPT 3.5 Turbo Instruct has a context window of 4K tokens, meaning it can process approximately 3,071 words of context at once.

Is GPT 3.5 Turbo Instruct open source?

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GPT 3.5 Turbo Instruct is a proprietary model developed by OpenAI. The model weights and training data are not publicly available.

Where can I use GPT 3.5 Turbo Instruct?

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You can chat with GPT 3.5 Turbo Instruct on idapt.app — no separate API key required. idapt is an AI workspace with 200+ models, agents, computers, and tasks. You can also access GPT 3.5 Turbo Instruct through OpenAI's own API or platform.

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