AI Model & Product
GPT-5.6 Sol
Also known as: Sol, GPT-5.6, OpenAI GPT-5.6 Sol
GPT-5.6 Sol is a named model release in OpenAI's GPT-5 line, following the pattern of point releases and codenames that sit on top of a major version. As with any recent model name, the exact capabilities, context limits, pricing and availability should be read from OpenAI's own model documentation rather than assumed from the version number. For marketers, the practical question is not the name but which model powers the assistant answers your audience actually sees.
What it is
It is a specific model version within the GPT-5 family, distinguished by a point number and a codename rather than a new major generation. Point releases of this kind usually adjust reasoning behaviour, speed, cost or tool use rather than replacing the underlying family. Treat published specifications from the provider as the only reliable source for what a given release does.
Why it matters
The model behind an AI assistant shapes how it reads pages, how much it reasons before answering, whether it browses the live web and how it cites sources. When a default model changes, the same prompt can return different brands, different phrasing and different link patterns. Growth and search teams therefore see answer visibility shift for reasons that have nothing to do with their own content.
How it works
Practitioners identify which model a surface is using, then re-run a fixed set of prompts before and after any switch to see what moved. They check whether the release browses live, how it handles long pages, and whether it names sources inline or in a footnote. Content and structured data are then adjusted to suit the retrieval and citation behaviour that is actually observed.
When it applies
It applies whenever you are testing, buying or reporting on assistant visibility and need to state precisely which model produced the answers.
Examples
- A team logs the model version alongside every stored answer in its prompt tracking sheet, so later drops can be traced to a model change.
- An API build pins a specific model string rather than a floating alias, to stop answers shifting mid-campaign.
- A monthly visibility report notes which assistant surfaces changed default model during the period, next to any swing in brand mentions.
How it is measured
- Brand mention rate across a fixed prompt set, compared before and after a model change
- Citation share of your domain in answers produced by each model version
- Answer agreement rate between model versions on the same prompts
- Cost and response time per answer when serving the model through the API
Related terms in AI Model & Product
- Agents APIAn Agents API is a programming interface for building applications where a model plans, calls tools and completes multi-step tasks rather than returning a single reply. The term is most often used for OpenAI's agent building interfaces, though other vendors offer equivalents. Teams use it to connect models to search, internal data and actions such as booking, updating records or generating reports.
- AI assistantAn AI assistant is a software product that uses a language model to hold a conversation, answer questions and carry out tasks on a user's behalf. It sits on top of one or more underlying models and adds an interface, memory, tools and safety controls. Examples include ChatGPT, Google Gemini, Microsoft Copilot, Claude and voice assistants such as Siri and Alexa.
- AI transcriptionAI transcription is the automatic conversion of spoken audio into written text using speech recognition models. Modern systems often add speaker labels, punctuation, timestamps and language detection, and can feed the output into summarisation or search. It is also called automatic speech recognition or ASR.
- BingBing is Microsooft's web search engine, available at bing.com and integrated into Microsoft Copilot and other Microsoft products. It maintains its own crawler, Bingbot, and its own index, and provides Bing Webmaster Tools for site owners. Its index and APIs have also supplied results to third-party search products and AI assistants.
- ChatGPT VoiceChatGPT Voice is the spoken conversation mode in OpenAI's ChatGPT apps, which lets you talk to the assistant and hear its replies read aloud. Advanced Voice Mode processes speech directly, so exchanges feel closer to a phone call and you can interrupt mid-answer. People use it hands free on mobile, and it is also available on desktop.
- Claude CodeClaude Code is Anthropic's agentic coding tool that works directly with a codebase, reading files, proposing and making edits, and running commands with permission. It runs in the terminal and in supported development environments, driven by natural language instructions rather than manual file by file editing. Marketing and growth teams use it for technical SEO, structured data and data tasks that would otherwise wait for engineering.
Primary research · August 2026
How ChatGPT Shortlists Software Brands
An audit across 10 categories and 60 buying questions. I recorded what ChatGPT reads, throws away and links to when a buyer asks it which software to buy, and what that decides.
- 60
- Questions asked
- 10
- Software markets
- 2,680
- Results read
- 367
- Links shown
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