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Maybe you have never written a line of code, but you still use software made by people who do. When a tool your team relies on gets a smarter engine, the change can reach your daily work fast. This update is a good example.
What was announced
Anthropic's newest Fable model, called Claude Fable 5.2, is now generally available in GitHub Copilot. GitHub Copilot is a coding assistant that works inside the editors programmers use every day. GitHub says the model is built for complex, multistep coding tasks across large codebases. A codebase is the full collection of files that makes up a software project.
GitHub also reports that, in early testing, Fable 5.2 solved more tasks than its predecessor, Claude Fable 5.1, while using fewer steps and tool calls. A tool call is when the AI uses an outside tool, such as a search or a code runner, to finish a job. These results come from GitHub's own testing, so treat them as the company's view rather than an independent measurement.
On Amazon Web Services (AWS), Anthropic says Fable 5.2 is its most capable generally available model for technical work, especially coding and science. It is offered through Amazon Bedrock, a service that lets businesses use AI models inside their own cloud setup.
The part that matters most: data retention
Here is the detail that changes how you should think about this release. Anthropic keeps some of your data when you use Fable 5.2. Specifically, prompts and outputs are retained so Anthropic's safety classifiers, which are automated filters that spot harmful use, can run. Anthropic says retained data is not used to train its models.
Retention is the default, so you cannot simply ignore it. Some organizations have a policy against storing prompts with outside providers, and this model does not fit that rule by default. AWS says data is retained for up to 30 days, with a human safety review carried out within the AWS boundary.
There is also a time-limited path for some businesses. Eligible enterprise customers can use zero data retention, meaning nothing is stored after the request, through the end of the calendar year while a newer safeguard system, called Enterprise Frontier Safeguards, is rolled out. GitHub says it cannot decide who qualifies, so you would need to talk to your GitHub account team.
Who can use it, and how
According to GitHub, Fable 5.2 is available to Copilot Pro+, Max, Business, and Enterprise users. It appears in the model picker, the menu where you choose which AI model to use, in several editors and apps, including Visual Studio Code and JetBrains IDEs. GitHub notes the rollout will be gradual, so you may need to wait before it shows up.
For Copilot Business and Enterprise, an administrator must enable the Claude Fable 5.2 policy in Copilot settings. That policy is off by default. Turning it on also means accepting the data retention requirement.
Mythos 5.2, a related model, is limited to authorized work in cybersecurity and life sciences through Anthropic's verification programs. Most readers will not need it.
Wrap-up
Claude Fable 5.2 is now showing up in GitHub Copilot and on AWS, aimed at multistep coding and technical work. Its biggest practical catch is default data retention, which makes the administrator's choice an important step. Your next move is simple: if you have access to Copilot or Bedrock at work, read the data retention section of the official documentation today and share it with the person who manages your settings.