GPT-5.5 Instant

Evidence (6)

• 7OpenAI Blog·5/5/2026model_release
  GPT-5.5 Instant upgrades ChatGPT’s default model

  OpenAI has updated ChatGPT’s default model to GPT-5.5 Instant, emphasizing smarter and more accurate responses. The release also reduces hallucinations and gives users more control over personalization.

• 6OpenAI Blog·5/5/2026model_release
  GPT-5.5 Instant System Card

  OpenAI published the system card for GPT-5.5 Instant, describing the model’s evaluation, safety, and behavioral characteristics. The document provides a formal overview of how the model was assessed and the safeguards considered for its deployment.

• 8OpenAI Blog·4/23/2026model_release
  OpenAI introduces GPT-5.5

  OpenAI has announced GPT-5.5, describing it as its smartest model to date. The model is positioned as faster and more capable for complex workloads such as coding, research, and data analysis across tools.

• 6OpenAI Blog·3/3/2026model_release
  GPT-5.3 Instant System Card

  OpenAI has published the system card for GPT-5.3 Instant, outlining the model’s behavior, capabilities, and safety considerations. The document provides a formal reference for how this version is intended to perform and where its known limitations or risks may lie.

• 5OpenAI Blog·3/3/2026model_release
  OpenAI releases GPT-5.3 Instant for smoother everyday chat

  OpenAI announced GPT-5.3 Instant, a new model variant designed to make everyday conversations feel smoother and more useful. The release appears focused on improving general chat quality and user experience rather than introducing a new product category.

• 7OpenAI Blog·1/16/2026product_launch
  ChatGPT Go expands worldwide

  OpenAI has made ChatGPT Go available worldwide. The offering provides broader access to GPT-5.2 Instant, higher usage limits, and longer memory at a lower cost.