Chat GPT 5
AI assistant app

GPT-5 brings major improvements over GPT-4 and GPT-4o. It significantly reduces hallucinations and sycophancy, meaning it provides more accurate, honest responses instead of just telling you what you want to hear. GPT-5 also offers better multilingual performance across 28+ languages and delivers safer completions with improved content filtering. The reasoning capabilities are substantially enhanced, making it more reliable for complex tasks like coding, analysis, and research.

ChatGPT-5 gives you access to the full range of GPT-5 models through our model picker: GPT-5 Main for everyday tasks, GPT-5 Main Mini for faster responses, GPT-5 Thinking for complex reasoning and problem-solving, GPT-5 Thinking Mini for quick analytical tasks, and GPT-5 Thinking Pro for the most demanding use cases, plus GPT-5 Pro for enterprise needs. You can also access GPT-4.5 and GPT-4o when needed. Switch between models instantly without leaving your workflow.

GPT-5 is built with comprehensive safety measures. It uses reinforcement learning from human feedback (RLHF) and fine-tuning with training examples designed to prevent over-agreement and sycophancy. The model includes always-on classifiers and reasoning monitors that evaluate outputs in real-time, plus biological risk safeguards for sensitive topics. OpenAI conducted extensive adversarial testing and threat modeling with partners like NeuralTrust and SPLX to identify vulnerabilities. Sycophancy evaluations ensure the model gives honest answers rather than just agreeable ones. OpenAI’s system card documents all security gaps addressed. These layers work together to deliver safe completions you can trust.

GPT-5 is built on an advanced transformer architecture enhanced with a Vision Transformer (ViT) for multimodal capabilities, allowing it to process both text and images. The model uses a sophisticated router system to direct queries to specialized components. It was trained on Microsoft Azure AI supercomputers powered by NVIDIA GPUs in massive AI supercomputing clusters. The model weights were optimized through unsupervised pretraining on diverse real signals from the internet, followed by supervised fine-tuning to improve accuracy and usefulness.

GPT-5’s training involved multiple stages. First, unsupervised pretraining used carefully curated data for training, exposing the model to vast amounts of text and multimodal content to learn patterns and knowledge. Then supervised fine-tuning refined the model using curated examples. Finally, reinforcement learning from human feedback (RLHF) aligned the model with human preferences and values. This multi-stage approach, combined with the massive computing power of AI supercomputing clusters, produced model weights that deliver unprecedented performance across reasoning, creativity, and factual accuracy.

Yes! GPT-5’s agentic functionality enables you to create custom AI agents with advanced agentic tool use and instruction following. Developers can use the OpenAI Python SDK for full control, or choose no-code platforms like Botpress Studio for visual building. GPT-5 excels at chain-of-thought process and prompt-chaining for complex multi-step tasks. Connect your agents to external services via application connectors and native integrations. Whether you’re building on AI agent platforms or creating standalone solutions, GPT-5 provides the foundation for powerful, autonomous AI assistants.

GPT-5 delivers state-of-the-art performance across industry benchmarks. As a deeper reasoning model, it excels on FrontierMath, GPQA Diamond PhD-level science questions, and HMMT Harvard-MIT Mathematics Tournament problems. It tops the ArtificialAnalysis Composite Benchmark, LMArena rankings, and SWE-Bench Verified for coding tasks. GPT-5 features an expanded context window for handling longer documents, advanced multimodal understanding for text and images, and a real-time router that optimizes responses. These results confirm GPT-5 as the leading model for complex reasoning and real-world applications.

GPT-5 transforms multiple industries. In education, students and teachers use it for learning and lesson planning. Law professionals draft documents and research cases faster. Healthcare workers get help with health-related questions and medical documentation. Customer support teams automate responses and improve service quality. The multilingual capabilities make it valuable for global businesses operating across languages.

Yes, data privacy is a top priority. OpenAI’s system card fully documents how security gaps have been identified and addressed. Your conversations are encrypted and protected. The data for training GPT-5 was carefully curated to respect privacy standards. OpenAI doesn’t use your Chat GPT 5 extension conversations to train models without consent. Enterprise users with GPT-5 Pro get additional data controls and compliance features.

Chat GPT 5 leverages OpenAI’s market position as the leading AI provider. The model picker gives you instant access to GPT-5 Pro and all GPT-5 variants in one interface. Unlike competitors, GPT-5 dramatically reduces hallucinations for more accurate responses. Full multilingual support across 28+ languages sets it apart. Plus, you get browser-native access without subscriptions or complex setups.