Chat with ChatGPT-4.5
Experience GPT‑4.5, the largest chat model, excels in patterns, connections, and creative insights.
GPT-4.5: Uncovering Novel Capabilities
Enhanced Unsupervised Learning
GPT-4.5 improves its ability to recognize patterns and generate insights by scaling unsupervised learning. Trained on Microsoft Azure AI supercomputers, it leverages OpenAI's advanced architecture and optimization. The result is a model that has broader knowledge and a deeper understanding of the world, leading to reduced hallucinations and more reliability across a wide range of topics.
More Natural Interaction
Interacting with GPT-4.5 feels seamless and intuitive. It has a better understanding of what humans mean, interpreting subtle cues or implicit expectations with greater nuance and “EQ.” GPT-4.5 also shows stronger aesthetic intuition and creativity, excelling at tasks like writing, design, programming support, and solving practical problems effectively.
Foundation for Reasoning
GPT-4.5 is a smarter, general-purpose model that excels in pre-training while laying the groundwork for future reasoning capabilities. Unlike reasoning models, it doesn’t “think” before responding but complements them by serving as a stronger foundation for reasoning and tool-using agents. This balance of pre-training and reasoning will shape the future of AI intelligence.
GPT-4.5 vs GPT-4o: Detailed Feature Comparison
Discover the key features, capabilities, and differences between the GPT-4.5 and GPT-4o models in detail.
Feature | GPT-4.5 | GPT-4o |
|---|---|---|
| Performance Metrics | ||
GPQA (science) | 71.4% | 53.6% |
AIME '24 (math) | 36.7% | 9.3% |
MMMLU (multilingual) | 85.1% | 81.5% |
MMMU (multimodal) | 74.4% | 69.1% |
SWE-lancer Diamond (coding) | 32.6% | 23.3% |
SWE-Bench Verified (coding) | 38.0% | 30.7% |
Good news! You can use GPT-4.5 in Monica AI!
Monica AI also integrates DeepSeek-V3, ChatGPT-4, Claude 3.5, Sonnet V2 and many other powerful large language models.
Frequently Asked Questions
What is GPT-4.5?
GPT-4.5 is OpenAI's latest language model, designed as an improvement over GPT-4. It enhances reasoning, creativity, and conversational warmth while reducing hallucinations. GPT-4.5 was trained using scaled unsupervised learning and optimization techniques, making it better at recognizing patterns, drawing connections, and solving practical problems. It is available as a research preview for ChatGPT Pro users and developers.
Is GPT-4.5 free?
No, GPT-4.5 is not free. You can use GPT-4.5 by subscribing to it through Monica, consulting our pricing page. Monica provides free access to other models, such as Deepseek-R1.
What is GPT-4.5's release date?
GPT-4.5 is already available as of February 27, 2025. It was released as a research preview by OpenAI.
What are GPT-4.5's main improvements?
GPT-4.5 improves natural interaction, with broader knowledge and reduced hallucination rates. It has higher emotional intelligence (EQ), better nuance understanding, and stronger creative and aesthetic intuition, making it ideal for writing, design, and problem-solving tasks.
How does GPT-4.5 handle complex tasks?
GPT-4.5 scales unsupervised learning, enabling better pattern recognition and reasoning. It reliably handles complex queries, STEM problems, and logic tasks while generating coherent, nuanced long-form content with fewer errors.
What is the difference between GPT-4.5 and GPT-5?
Currently, GPT-5 has not been officially launched, so no direct comparison can be made. GPT-4.5 is described as an incremental improvement over GPT-4, focusing on better collaboration, reduced hallucinations, and improved conversational experience. It is not considered a "frontier model," which might suggest GPT-5 will introduce more groundbreaking capabilities when it is released.