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GPT 3.5 Turbo 16K vs GPT 4 – A Comprehensive Comparison

By June 26th, 2023No Comments5 min read

Artificial Intelligence (AI) has made significant strides in recent years, with OpenAI’s GPT models gaining prominence for their impressive natural language processing capabilities. With the release of the GPT 3.5 Turbo 16K model, users now have another option to consider when choosing an AI model for their project. But how does it compare to the more powerful GPT 4? In this blog post, we provide a detailed comparison between GPT 3.5 Turbo 16K and GPT 4, covering cost differences, token length, training parameters, power and durability, and features such as the ChatGPT interface, plugins, and web surfing integration.

Cost Differences

One of the most important factors to consider when choosing an AI model is the cost of usage. GPT 4, being the most powerful and expensive model by OpenAI, comes at a cost of 0.03 per 1000 tokens (input) and 0.06 per 1000 tokens (output). This means you would be paying 3 cents for every 750 words you input as prompts, and 6 cents for every 750 words generated by the AI as output.

On the other hand, the GPT 3.5 Turbo 16K model offers a considerably lower cost for users. The pricing for this model is 0.003 per 1000 tokens (input) and 0.004 per 1000 tokens (output). In simple terms, you would be paying half the price of GPT 4 for both input and output when using GPT 3.5 Turbo 16K.

The lower cost of GPT 3.5 Turbo 16K makes it an attractive option for users who require large amounts of text generation without breaking the bank. However, it’s crucial to weigh the cost savings against the potential differences in performance and features, which we’ll discuss in the following sections.

Token Length

Tokens play a crucial role in AI models as they represent the smallest units of text the model can process. The length of tokens available determines the amount of content the AI model can generate or process at once. Comparing the token length between GPT 4 and GPT 3.5 Turbo 16K, we find a significant difference:

  • GPT 4: 8K tokens, which translates to approximately 6,000 words
  • GPT 3.5 Turbo 16K: 16K tokens, equivalent to around 12,000 words

The increased token length in GPT 3.5 Turbo 16K allows users to generate or process double the amount of content compared to GPT 4. This is particularly useful for projects requiring longer text completions or responses while maintaining context throughout the generated content.

It’s worth noting that this increased token length comes without a significant increase in cost, making GPT 3.5 Turbo 16K an appealing choice for users who require more content generation capacity at a lower price point.

Training Parameters

Parameters are an essential aspect of AI models, representing the amount of data and the complexity with which the model has been trained. AI models with more parameters are generally more powerful and capable of generating higher-quality text with greater nuance and depth.

OpenAI does not disclose the exact number of training parameters for its models. However, it is widely believed that GPT 4 has been trained on more parameters compared to GPT 3.5 Turbo 16K. Rumored figures suggest that GPT-3 was trained on 175 billion parameters, while GPT-4 has been trained on about a hundred trillion parameters.

Although GPT 3.5 Turbo 16K may have been trained on fewer parameters than GPT 4, it’s worth noting that it still offers significant improvements over the older GPT 3.5 model. Users can expect better performance from GPT 3.5 Turbo 16K compared to the non-turbo version but should be aware that it may not match the capabilities of GPT 4 in certain scenarios.

Power and Durability

Power and durability in the context of AI models refer to their ability to understand and generate contextually accurate, nuanced, and high-quality text. A model with higher power and durability is generally better at handling a wide range of topics and producing more in-depth responses.

While GPT 4 is known for its power and durability due to its larger training dataset, GPT 3.5 Turbo 16K has made improvements compared to the older GPT 3.5 model. However, it’s still not as powerful as GPT 4. GPT 4 is better at understanding context from various topics, enabling users to have more control over the AI’s responses and better customize them using chosen personalities.

That being said, the improvements in GPT 3.5 Turbo 16K’s durability make it a viable option for users who require a balance between cost and performance. The model may not offer the same level of control and customization as GPT 4, but it can still produce high-quality results at a lower cost.

ChatGPT Interface, Plugins, and Web Surfing Integration

One significant distinction between GPT 3.5 Turbo 16K and GPT 4 lies in the availability of the ChatGPT interface and its associated features.

For users of GPT 4, the ChatGPT interface provides a user-friendly platform to interact with the AI model. Additionally, GPT 4 users have access to plugins and web surfing integration through Bing, enabling them to enhance their experience and access real-time information from the web.

Currently, these features are not available for GPT 3.5 Turbo 16K users. To access GPT 3.5 Turbo 16K, users need to apply for the GPT API and use it in the playground mode. As such, users who prioritize the convenience of an interface or require plugin and web surfing integration may still prefer GPT 4 over GPT 3.5 Turbo 16K.

However, it’s worth noting that OpenAI may introduce GPT 3.5 Turbo 16K to the ChatGPT interface in the future, potentially giving users access to these features. Until then, users must weigh the advantages of cost and token length against the convenience and additional features offered by GPT 4.


In conclusion, GPT 3.5 Turbo 16K and GPT 4 each have their benefits and drawbacks. Users who prioritize cost savings and require more content generation capacity may find GPT 3.5 Turbo 16K to be the better option. However, those who need higher power, durability, and access to the ChatGPT interface with plugins and web surfing integration may prefer GPT 4.

It’s essential to carefully evaluate the specific requirements of your project before choosing between the two models. By understanding the key differences in cost, token length, training parameters, power and durability, and available features, you’ll be well-equipped to make an informed decision that best suits your needs.

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