OpenAI: GPT-4 Turbo Preview
Analysis Summary
GPT-4 Turbo Preview is an early preview variant offering a 128K context window, tool use, and function calling. The supplied record does not include independent benchmark results for this exact model, while pricing is listed at $10 per million input tokens and $30 per million output tokens. Its modality is text to text.
The large context and API-oriented features could support document review, structured drafting, and basic automation, but the absence of model-specific evidence makes reliability difficult to establish. High output pricing also limits its usefulness for routine traffic. Treat it as a legacy integration candidate only, with extensive evaluation before client deployment, rather than as a preferred choice for new content or agent workflows.
Assessed August 9, 2026
Editorial notes
GPT-4 Turbo Preview provides a 128K context window, tool use, and function calling for long documents and structured workflows, but this unbenchmarked preview is expensive and unsuitable as a new default.
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DFO Verdict
GPT-4 Turbo Preview provides a 128K context window, tool use, and function calling for long documents and structured workflows, but this unbenchmarked preview is expensive and unsuitable as a new default.
How OpenAI: GPT-4 Turbo Preview compares
Its 128K-token context window is larger than 36% of the models we list. At $10.00 per million input tokens it is cheaper than 4% of comparable models.
Dark bar = input · light bar = output, scaled to the priciest peer.
1M tokens ≈ 8 full-length novels or ~2,500 pages of business documents in a single request.
Strongest on value. The pulled-in technical corner is the trade-off, and if the shape matters more than the price, this is your model.
Compare shapes side-by-side →Pricing
| Token Type | Cost per 1M tokens | Cost per 1K tokens |
|---|---|---|
| Input | $10.00 | $0.010000 |
| Output | $30.00 | $0.030000 |
What would OpenAI: GPT-4 Turbo Preview cost your business?
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A website chatbot handling around 100 customer conversations a day, a few short messages each.
Full calculator with 746 models → Price Calculator
These numbers get smaller with the right architecture.
We route routine calls to cheap models and save OpenAI: GPT-4 Turbo Preview for the hard ones. Most clients cut their estimate by 60-80%.
Talk to our teamAbout 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..
Frequently asked questions about OpenAI: GPT-4 Turbo Preview
How much does OpenAI: GPT-4 Turbo Preview cost?
OpenAI: GPT-4 Turbo Preview costs $10.00 per million input tokens and $30.00 per million output tokens.
What is the context window of OpenAI: GPT-4 Turbo Preview?
OpenAI: GPT-4 Turbo Preview has a context window of 128,000 tokens (128K).
What can OpenAI: GPT-4 Turbo Preview do?
OpenAI: GPT-4 Turbo Preview supports tool use and function calling.
Who created OpenAI: GPT-4 Turbo Preview?
OpenAI: GPT-4 Turbo Preview is developed by OpenAI and was released on January 25, 2024.