OpenAI Blog
May 5
GPT-5.5 Instant: smarter, clearer, and more personalized
GPT-5. 5 Instant updates ChatGPT’s default model with smarter, more accurate answers, reduced hallucinations, and improved personalization controls.
GPT-5.3 Instant: Smoother, more useful everyday conversations
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GPT-5.1: A smarter, more conversational ChatGPT
We’re upgrading the GPT-5 series with warmer, more capable models and new ways to customize ChatGPT’s tone and style. GPT-5.
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Dec 11, 2025
Introducing GPT-5.2
GPT-5. 2 is our most advanced frontier model for everyday professional work, with state-of-the-art reasoning, long-context understanding, coding, and vision.
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Aug 6
Improving GPT‑5.6 Sol in ChatGPT—and expanding access to GPT-5.6 Luna for free users
ChatGPT introduces improved GPT-5. 6 Sol with better accuracy and consistency, plus expanded access for free users and unlimited everyday chats with GPT-5.
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Oct 27, 2025
Addendum to GPT-5 System Card: Sensitive conversations
This system card details GPT-5’s improvements in handling sensitive conversations, including new benchmarks for emotional reliance, mental health, and jailbreak resistance.
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Feb 12
Introducing GPT-5.3-Codex-Spark
Introducing GPT-5. 3-Codex-Spark—our first real-time coding model.
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May 13, 2024
Introducing GPT-4o and more tools to ChatGPT free users
Introducing GPT-4o and more tools to ChatGPT free users We are launching our newest flagship model and making more capabilities available for free in ChatGPT.
OpenAI Blog
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GPT-3 powers the next generation of apps
Over 300 applications are delivering GPT-3–powered search, conversation, text completion, and other advanced AI features through our API.
OpenAI Blog
Jun 18
Improving health intelligence in ChatGPT
Learn how GPT-5. 5 Instant improves ChatGPT’s health and wellness responses with stronger reasoning, better context, clearer communication, and physician-informed evaluations.
OpenAI Blog
May 13, 2024
Hello GPT-4o
We’re announcing GPT-4 Omni, our new flagship model which can reason across audio, vision, and text in real time.
OpenAI Blog
Jul 8
Introducing GPT-Live
A new generation of voice models for natural human-AI interaction, now powering ChatGPT Voice.
OpenAI Blog
Jan 7
How Tolan builds voice-first AI with GPT-5.1
Tolan built a voice-first AI companion with GPT-5. 1, combining low-latency responses, real-time context reconstruction, and memory-driven personalities for natural conversations.