At DevDay, a showcase of cutting-edge advances in artificial intelligence, OpenAI introduced a number of new features and updates for developers and ChatGPT users, including the ability to create custom GPTs.
But first, let’s explore the latest version of GPT…
GPT-4 Turbo
Among the standout announcements was the launch of GPT-4 Turbo, a supercharged version of their already powerful AI model that promises unprecedented efficiency and deeper understanding of recent world events.
GPT-4 Turbo has advanced features including knowledge of world events through April 2023 and an impressive 128,000 context window, allowing over 300 pages of text to be processed in a single prompt.
This improvement is accompanied by a cost reduction, making it three times cheaper for input tokens and twice as cheap for output tokens compared to its predecessor GPT-4.
The new model, currently in preview, is available to all paying developers. OpenAI has also made updates to the function call, allowing for more precise and complex multi-function commands in a single message.
The introduction of JSON mode for developers is another significant upgrade that ensures valid JSON output, which is particularly useful for tasks that involve generating specific formats.
Assistant API

OpenAI has introduced the Assistants API, which aims to make it easier to build AI-driven applications with features such as a code interpreter, polling, and improved function calling.
This new API marks a step toward more sophisticated and flexible AI tools that can handle complex tasks more efficiently.
Updates for GPT-3.5 Turbo
Additionally, OpenAI has updated its GPT 3.5 Turbo model with a standard 16K context window and improved performance on various tasks.
The updates reflect a 38 percent improvement in the format after tasks such as JSON, XML and YAML generation.
Multimodality
In the area of vision, GPT-4 Turbo can now process images, a feature already used by companies like BeMyEyes to help people with visual impairments.
Additionally, developers can now integrate DALL·E 3 into their image generation applications, with OpenAI providing a robust moderation system to prevent misuse.
Not ignoring human-like interactions, OpenAI has introduced a text-to-speech API with human-grade speech generation that offers different language presets and model variants for different applications.
GPT-4 fine-tuning
The company also provides experimental access to fine-tune GPT-4, with a focus on quality and security improvements.
For companies requiring customized solutions, the Custom Models program was created, offering tailored GPT-4 training with exclusive access to custom models.
Price cuts for developers
Price reductions for various services were announced, as well as increased tariff limits to support application scaling.

Most notably, GPT-4 Turbo input tokens cost three times less than GPT-4 at $0.01, and output tokens cost twice as much at $0.03.
Copyright sign
OpenAI’s commitment to copyright protection is further strengthened with the launch of Copyright Shield. This protects ChatGPT enterprise users and API developers.
voice recognition
Additionally, OpenAI expands its speech recognition capabilities with Whisper Large-v3 and the Consistency Decoder, promising improved performance and image quality.
Custom GPTs

OpenAI also introduced GPTs, a feature that allows users to customize ChatGPT for specific purposes, encouraging community participation in AI development.
This feature is complemented by the upcoming GPT Store, which will showcase user-created GPTs.

GPT-4 All tools
The company has simplified the use of ChatGPT, powered by GPT-4 Turbo, which includes information through April 2023 and eliminates the need to switch between models.

Shaping the future of AI
OpenAI’s latest advances, announced at DevDay, represent a step forward in AI technology, providing more robust, efficient and accessible tools for developers and businesses.
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