Back to list

🧠 Claude Fable 5.2, GPT-6.1 Terra, and Models That Keep Up

Claude Fable 5.2 is in the model picker, the GPT Terra Stable row now runs GPT-6.1 Terra, and OpenAI Responses and Gemini agents now keep up with new model releases on their own.

🧠 New models

Claude Fable 5.2. Anthropic's newest Fable model is now the Fable option in the model picker on Claude Agent SDK and Anthropic agents. It runs only on the agent's own Anthropic API key, so Anthropic bills the model usage to your account. Agents saved on Fable 5.1 keep running. Model settings.

Model Selection on a Claude Agent SDK agent that uses its own Anthropic key, with Claude Fable 5.2 above the Stable Claude rows (sample agent)

GPT-6.1 Terra. On Claude Agent SDK agents, the GPT Terra Stable row now runs GPT-6.1 Terra. Agents pinned to a specific version stay where you put them.

Try it: open an agent, go to Settings, and look at Model Selection. To pick Fable 5.2, select a Claude model, then turn on Use my own Anthropic API key under API Key.

🔄 OpenAI Responses and Gemini agents stay current

Automatic latest. OpenAI Responses and Google Gemini agents now follow new releases in their tier, as Claude agents already do. An unpinned agent on GPT-5.6 Sol now runs GPT-6.1 Sol, for example. When you choose a specific release in the dashboard, the agent stays on it, and models without a tier, such as GPT-5.5 and GPT-4o, run as chosen.

GPT-6 on OpenAI Responses. The Stable rows GPT Astra, Sol, Terra and Luna now run GPT-6 Astra, GPT-6.1 Sol, GPT-6.1 Terra and GPT-6 Luna. GPT-5.6 and older releases are under Other versions. How Stable rows work.

Model Selection on an OpenAI Responses agent: Stable rows for GPT Astra, Sol, Terra and Luna, with Other versions below (sample agent)

âš¡ Also shipped

Pasted images in Microsoft Teams. Images pasted into the body of a Teams message now reach the agent, not only files attached with the paperclip.

Wide images keep their edges. On Anthropic agents, a wide image such as a screenshot of a table is scaled down instead of cropped, so the columns at the edges stay visible to the model.

Reconnect Confluence in one click. When a Confluence knowledge source needs you to sign in again, a message with a Reconnect button opens the sign-in, and a suspended source shows a notice that links to it. Confluence guide.

Google Drive service accounts. The Service Account picker shows a loading state until account emails arrive, then lists them sorted by email. If the lookup fails, you can retry and still switch accounts. Google Drive guide.

Website crawls identify as RunbearBot. The website crawler now identifies itself as RunbearBot and skips common analytics scripts, so its visits stop showing up as people in most site analytics. Website guide.