-
OpenAI GPT-5 System Card
Authors:
Aaditya Singh,
Adam Fry,
Adam Perelman,
Adam Tart,
Adi Ganesh,
Ahmed El-Kishky,
Aidan McLaughlin,
Aiden Low,
AJ Ostrow,
Akhila Ananthram,
Akshay Nathan,
Alan Luo,
Alec Helyar,
Aleksander Madry,
Aleksandr Efremov,
Aleksandra Spyra,
Alex Baker-Whitcomb,
Alex Beutel,
Alex Karpenko,
Alex Makelov,
Alex Neitz,
Alex Wei,
Alexandra Barr,
Alexandre Kirchmeyer,
Alexey Ivanov
, et al. (461 additional authors not shown)
Abstract:
This is the system card published alongside the OpenAI GPT-5 launch, August 2025.
GPT-5 is a unified system with a smart and fast model that answers most questions, a deeper reasoning model for harder problems, and a real-time router that quickly decides which model to use based on conversation type, complexity, tool needs, and explicit intent (for example, if you say 'think hard about this' in…
▽ More
This is the system card published alongside the OpenAI GPT-5 launch, August 2025.
GPT-5 is a unified system with a smart and fast model that answers most questions, a deeper reasoning model for harder problems, and a real-time router that quickly decides which model to use based on conversation type, complexity, tool needs, and explicit intent (for example, if you say 'think hard about this' in the prompt). The router is continuously trained on real signals, including when users switch models, preference rates for responses, and measured correctness, improving over time. Once usage limits are reached, a mini version of each model handles remaining queries.
This system card focuses primarily on gpt-5-thinking and gpt-5-main, while evaluations for other models are available in the appendix. The GPT-5 system not only outperforms previous models on benchmarks and answers questions more quickly, but -- more importantly -- is more useful for real-world queries. We've made significant advances in reducing hallucinations, improving instruction following, and minimizing sycophancy, and have leveled up GPT-5's performance in three of ChatGPT's most common uses: writing, coding, and health. All of the GPT-5 models additionally feature safe-completions, our latest approach to safety training to prevent disallowed content.
Similarly to ChatGPT agent, we have decided to treat gpt-5-thinking as High capability in the Biological and Chemical domain under our Preparedness Framework, activating the associated safeguards. While we do not have definitive evidence that this model could meaningfully help a novice to create severe biological harm -- our defined threshold for High capability -- we have chosen to take a precautionary approach.
△ Less
Submitted 1 May, 2026; v1 submitted 19 December, 2025;
originally announced January 2026.
-
OpenAI o1 System Card
Authors:
OpenAI,
:,
Aaron Jaech,
Adam Kalai,
Adam Lerer,
Adam Richardson,
Ahmed El-Kishky,
Aiden Low,
Alec Helyar,
Aleksander Madry,
Alex Beutel,
Alex Carney,
Alex Iftimie,
Alex Karpenko,
Alex Tachard Passos,
Alexander Neitz,
Alexander Prokofiev,
Alexander Wei,
Allison Tam,
Ally Bennett,
Ananya Kumar,
Andre Saraiva,
Andrea Vallone,
Andrew Duberstein,
Andrew Kondrich
, et al. (240 additional authors not shown)
Abstract:
The o1 model series is trained with large-scale reinforcement learning to reason using chain of thought. These advanced reasoning capabilities provide new avenues for improving the safety and robustness of our models. In particular, our models can reason about our safety policies in context when responding to potentially unsafe prompts, through deliberative alignment. This leads to state-of-the-ar…
▽ More
The o1 model series is trained with large-scale reinforcement learning to reason using chain of thought. These advanced reasoning capabilities provide new avenues for improving the safety and robustness of our models. In particular, our models can reason about our safety policies in context when responding to potentially unsafe prompts, through deliberative alignment. This leads to state-of-the-art performance on certain benchmarks for risks such as generating illicit advice, choosing stereotyped responses, and succumbing to known jailbreaks. Training models to incorporate a chain of thought before answering has the potential to unlock substantial benefits, while also increasing potential risks that stem from heightened intelligence. Our results underscore the need for building robust alignment methods, extensively stress-testing their efficacy, and maintaining meticulous risk management protocols. This report outlines the safety work carried out for the OpenAI o1 and OpenAI o1-mini models, including safety evaluations, external red teaming, and Preparedness Framework evaluations.
△ Less
Submitted 29 April, 2026; v1 submitted 21 December, 2024;
originally announced December 2024.
-
GPT-4o System Card
Authors:
OpenAI,
:,
Aaron Hurst,
Adam Lerer,
Adam P. Goucher,
Adam Perelman,
Aditya Ramesh,
Aidan Clark,
AJ Ostrow,
Akila Welihinda,
Alan Hayes,
Alec Radford,
Aleksander Mądry,
Alex Baker-Whitcomb,
Alex Beutel,
Alex Borzunov,
Alex Carney,
Alex Chow,
Alex Kirillov,
Alex Nichol,
Alex Paino,
Alex Renzin,
Alex Tachard Passos,
Alexander Kirillov,
Alexi Christakis
, et al. (395 additional authors not shown)
Abstract:
GPT-4o is an autoregressive omni model that accepts as input any combination of text, audio, image, and video, and generates any combination of text, audio, and image outputs. It's trained end-to-end across text, vision, and audio, meaning all inputs and outputs are processed by the same neural network. GPT-4o can respond to audio inputs in as little as 232 milliseconds, with an average of 320 mil…
▽ More
GPT-4o is an autoregressive omni model that accepts as input any combination of text, audio, image, and video, and generates any combination of text, audio, and image outputs. It's trained end-to-end across text, vision, and audio, meaning all inputs and outputs are processed by the same neural network. GPT-4o can respond to audio inputs in as little as 232 milliseconds, with an average of 320 milliseconds, which is similar to human response time in conversation. It matches GPT-4 Turbo performance on text in English and code, with significant improvement on text in non-English languages, while also being much faster and 50\% cheaper in the API. GPT-4o is especially better at vision and audio understanding compared to existing models. In line with our commitment to building AI safely and consistent with our voluntary commitments to the White House, we are sharing the GPT-4o System Card, which includes our Preparedness Framework evaluations. In this System Card, we provide a detailed look at GPT-4o's capabilities, limitations, and safety evaluations across multiple categories, focusing on speech-to-speech while also evaluating text and image capabilities, and measures we've implemented to ensure the model is safe and aligned. We also include third-party assessments on dangerous capabilities, as well as discussion of potential societal impacts of GPT-4o's text and vision capabilities.
△ Less
Submitted 25 October, 2024;
originally announced October 2024.
-
Transformative AGI by 2043 is <1% likely
Authors:
Ari Allyn-Feuer,
Ted Sanders
Abstract:
This paper is a submission to the Open Philanthropy AI Worldviews Contest. In it, we estimate the likelihood of transformative artificial general intelligence (AGI) by 2043 and find it to be <1%.
Specifically, we argue:
The bar is high: AGI as defined by the contest - something like AI that can perform nearly all valuable tasks at human cost or less - which we will call transformative AGI is a…
▽ More
This paper is a submission to the Open Philanthropy AI Worldviews Contest. In it, we estimate the likelihood of transformative artificial general intelligence (AGI) by 2043 and find it to be <1%.
Specifically, we argue:
The bar is high: AGI as defined by the contest - something like AI that can perform nearly all valuable tasks at human cost or less - which we will call transformative AGI is a much higher bar than merely massive progress in AI, or even the unambiguous attainment of expensive superhuman AGI or cheap but uneven AGI.
Many steps are needed: The probability of transformative AGI by 2043 can be decomposed as the joint probability of a number of necessary steps, which we group into categories of software, hardware, and sociopolitical factors.
No step is guaranteed: For each step, we estimate a probability of success by 2043, conditional on prior steps being achieved. Many steps are quite constrained by the short timeline, and our estimates range from 16% to 95%.
Therefore, the odds are low: Multiplying the cascading conditional probabilities together, we estimate that transformative AGI by 2043 is 0.4% likely. Reaching >10% seems to require probabilities that feel unreasonably high, and even 3% seems unlikely.
Thoughtfully applying the cascading conditional probability approach to this question yields lower probability values than is often supposed. This framework helps enumerate the many future scenarios where humanity makes partial but incomplete progress toward transformative AGI.
△ Less
Submitted 4 June, 2023;
originally announced June 2023.
-
GPT-4 Technical Report
Authors:
OpenAI,
Josh Achiam,
Steven Adler,
Sandhini Agarwal,
Lama Ahmad,
Ilge Akkaya,
Florencia Leoni Aleman,
Diogo Almeida,
Janko Altenschmidt,
Sam Altman,
Shyamal Anadkat,
Red Avila,
Igor Babuschkin,
Suchir Balaji,
Valerie Balcom,
Paul Baltescu,
Haiming Bao,
Mohammad Bavarian,
Jeff Belgum,
Irwan Bello,
Jake Berdine,
Gabriel Bernadett-Shapiro,
Christopher Berner,
Lenny Bogdonoff,
Oleg Boiko
, et al. (256 additional authors not shown)
Abstract:
We report the development of GPT-4, a large-scale, multimodal model which can accept image and text inputs and produce text outputs. While less capable than humans in many real-world scenarios, GPT-4 exhibits human-level performance on various professional and academic benchmarks, including passing a simulated bar exam with a score around the top 10% of test takers. GPT-4 is a Transformer-based mo…
▽ More
We report the development of GPT-4, a large-scale, multimodal model which can accept image and text inputs and produce text outputs. While less capable than humans in many real-world scenarios, GPT-4 exhibits human-level performance on various professional and academic benchmarks, including passing a simulated bar exam with a score around the top 10% of test takers. GPT-4 is a Transformer-based model pre-trained to predict the next token in a document. The post-training alignment process results in improved performance on measures of factuality and adherence to desired behavior. A core component of this project was developing infrastructure and optimization methods that behave predictably across a wide range of scales. This allowed us to accurately predict some aspects of GPT-4's performance based on models trained with no more than 1/1,000th the compute of GPT-4.
△ Less
Submitted 4 March, 2024; v1 submitted 15 March, 2023;
originally announced March 2023.
-
FIRST: A Framework for Optimizing Information Quality in Mobile Crowdsensing Systems
Authors:
Francesco Restuccia,
Pierluca Ferraro,
Timothy S. Sanders,
Simone Silvestri,
Sajal K. Das,
Giuseppe Lo Re
Abstract:
Mobile crowdsensing allows data collection at a scale and pace that was once impossible. One of the biggest challenges in mobile crowdsensing is that participants may exhibit malicious or unreliable behavior. Therefore, it becomes imperative to design algorithms to accurately classify between reliable and unreliable sensing reports. To this end, we propose a novel Framework for optimizing Informat…
▽ More
Mobile crowdsensing allows data collection at a scale and pace that was once impossible. One of the biggest challenges in mobile crowdsensing is that participants may exhibit malicious or unreliable behavior. Therefore, it becomes imperative to design algorithms to accurately classify between reliable and unreliable sensing reports. To this end, we propose a novel Framework for optimizing Information Reliability in Smartphone-based participaTory sensing (FIRST), that leverages mobile trusted participants (MTPs) to securely assess the reliability of sensing reports. FIRST models and solves the challenging problem of determining before deployment the minimum number of MTPs to be used in order to achieve desired classification accuracy. We extensively evaluate FIRST through an implementation in iOS and Android of a room occupancy monitoring system, and through simulations with real-world mobility traces. Experimental results demonstrate that FIRST reduces significantly the impact of three security attacks (i.e., corruption, on/off, and collusion), by achieving a classification accuracy of almost 80% in the considered scenarios. Finally, we discuss our ongoing research efforts to test the performance of FIRST as part of the National Map Corps project.
△ Less
Submitted 30 April, 2018;
originally announced April 2018.