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GPT 5.6
AI Modelsโ€บGPT

GPT 5.6

5.6ย ยทย Family: GPT
A premium-class model announced by OpenAI on 8 July 2026. Its earlier deployment had been blocked by the Trump administration on national-security grounds. Launching in the same week as Grok 4.5, it sets up a direct market comparison between the two models.
โณ Previewโณ Limited accessLLMReasoning model๐Ÿ“ GPT
Release date
8 July 2026
๐ŸขOpenAIProducer
Access:APIHostedDeployment:โ˜ Cloud

Overview

GPT 5.6 is a premium-class model announced by OpenAI on 8 July 2026, alongside the launch of xAI's Grok 4.5. According to reports, the model's earlier deployment had been withheld by the Trump administration on national-security grounds. OpenAI uses tiered pricing across its variants (including the cheaper Luna tier at 1 USD / 6 USD and the most expensive Sol tier at 5 USD / 30 USD). The launch of two premium-class models in the same week creates the first direct market comparison between GPT 5.6 and Grok 4.5.

Classification
LLMReasoning model
Family: GPT
Access & deployment
APIHosted
Cloud
Weights: Closed
Key parameters
โœ“ Tools
๐Ÿ“ฅ Input: text

Technical specification

License
Proprietary
Features:โœ“ Tool use
Modalities
โฌ‡ Input
text
โฌ† Output
text

Capabilities and applications

Native model capabilities
Reasoning
The model's ability to reason logically and solve complex problems.
Category: reasoning
Multi-step reasoning
Carrying out multi-step chains of reasoning across long, complex tasks.
Category: reasoning
Coding
Generating, analysing and modifying source code.
Category: coding
Multilingual
Understanding and generating text in many languages.
Category: language

Sources and related pages