OpenAI: GPT-4 Turbo Preview

OpenAIID: openai/gpt-4-turbo-preview

The preview GPT-4 model with improved instruction following, JSON mode, reproducible outputs, parallel function calling, and more. Training data: up to Dec 2023. **Note:** heavily rate limited by OpenAI while in preview.

Pricing per 1M Tokens

Input (Prompt)$10
Output (Completion)$30
Cache ReadFree
Cache WriteFree
ImageN/A

Specifications

Context Length128K
Max Output Tokens4K
Input ModalitiesText
Output ModalitiesText
TokenizerGPT
Instruct TypeN/A
Top Provider Context128K
Top Provider Max Output4K
ModeratedYes

Compare this model

See how OpenAI: GPT-4 Turbo Preview stacks up against other models.

vs OpenAI: GPT-5.4 Nanovs OpenAI: GPT-5.4 Minivs OpenAI: GPT-5.4 Provs OpenAI: GPT-5.4vs OpenAI: GPT-5.3 Chat

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Last updated: March 23, 2026

First tracked: March 23, 2026