To use Grok 4.5 on a website where you are already signed in, select the exact model in a local agent client, connect that client to Tabbit Browser with the Tabbit CLI skill, and ask it to read the same page you can see. A useful first task is to compare two visible rows on an internal dashboard and leave a named draft with the source URLs. Grok 4.5 does not itself connect to your browser, and a model's built-in web search is not the same as your signed-in session.
The current xAI API model ID is grok-4.5; xAI also lists aliases such as grok-4.5-latest and grok-build-latest. Cursor separately lists Grok 4.5 as a selectable model with Agent tools. Do not substitute Grok 4.6 or Grok 4.7. The exact route and client matter because a valid model request proves neither local CLI access nor website authentication. Check xAI's Grok 4.5 model page and the current Cursor model entry before choosing a host.
Key takeaways
Choose the exact
grok-4.5API route or the explicit Grok 4.5 model in a supported client.Grok 4.5, Grok 4.6, and Grok 4.7 are separate routes, not interchangeable labels.
Use a local client that can discover the Tabbit skill and call the installed CLI.
Sign in to the target site yourself in Tabbit Browser. Skill discovery, CLI reachability, and website login are separate checks.
Compare the same visible page and leave a named draft; ask a person to approve any action.
Identify the model, client, and browser separately
xAI documents grok-4.5 as the API model name, supports function calling, and lists the aliases grok-4.5-latest and grok-build-latest. An alias may move as a provider changes its default, so use the pinned model name when the point is to compare a repeatable run. xAI's page documents a 500,000-token context window, image input, reasoning, and structured outputs. Those details describe the model endpoint, not a browser already logged into your account. xAI's current Grok 4.5 docs.
Cursor's current model page lists Grok 4.5 and its Agent tool access, including Browser and shell. Cursor's model picker and plan documentation decide whether your account can use it. For this workflow, run the local Cursor Agent and invoke the Tabbit skill, rather than assuming Cursor's own Browser tool is the local Tabbit profile. Cursor discovers user skills under ~/.agents/skills/; the skill appears as /tabbit when available. See Cursor's Grok 4.5 docs and Agent Skills guide.
| Layer | What to confirm | What it does not confirm |
|---|---|---|
| xAI API | Model ID grok-4.5; account and API key allow a short request | A coding client has the model or a browser tool |
| Cursor client | Explicit Grok 4.5 in the local model picker; a short request succeeds | Cursor's Browser tool is your Tabbit profile |
| Tabbit skill | Local client discovers the installed tabbit skill as /tabbit | The CLI launcher is reachable |
| Tabbit CLI | A harmless page read runs in a task tab | The target website is signed in |
| Page evidence | The visible record label and values match the task report | A suggested change is safe to submit |
If your aim is to use xAI's Web Search or X Search, those tools find public information. They do not give a cloud model your local browser cookies. Function calling can invoke a local tool only when the host client supplies that tool and executes it. xAI explains the difference in its function-calling documentation. For model selection and browser connection problems, use the Grok 4.5 browser-use guide only for the newer model it covers, and follow this article's exact 4.5 route.
Prepare Tabbit Browser and the local client
Open Tabbit Browser and choose the profile that already has access to the target site.
Sign in yourself. Open one specific page, confirm the account and record, and note the visible date or filter.
Install the Tabbit CLI Skill for your local client. Cursor discovers skills from
~/.agents/skills/and makes them available in Agent; call/tabbitwhen it appears. Pi uses/skill:tabbit. Other clients may have a/skillslist or a skill picker.Ask for a read-only page title. If the skill appears but the CLI cannot launch, fix that local connection before asking the agent to interact with the site.
Check the page title and record ID in the separate task tab. If it reaches a login screen, sign in manually in the correct profile and repeat the read.
The browser environment is the same Tabbit profile, while the agent runs in its own task tab. You can keep other tabs open for source research or to review the output. A local test for this batch opened a protected fixture before and after setting a short-lived test cookie; a second Tabbit CLI task read the same fixture page in its own tab. The test recorded the heading Release notes review and fixture GEO-104. This verifies session reuse in that test environment only. It does not show Grok 4.5 ran the test or prove that every site allows session reuse. See how to connect an agent to an existing browser.
A cloud Cursor Agent or another remote runner may not reach your local Tabbit Browser. Use a supported local agent or ask the remote agent to produce a checklist for a local run. Do not send cookies or passwords. Before using a real account, follow the browser-agent first-task checklist and compare Browser MCP with CLI.
Compare Grok 4.5 on one page
A model switch is only useful if the input stays the same. Choose a read-only record or public test page, fix the date range and filters, and keep the task instruction identical for each run. If comparing Grok 4.5 with another model, change only the selected model. Record what the page visibly shows and what the agent reports. Do not infer a general model ranking from one page or one retry.
Use the Tabbit CLI skill in my current Tabbit Browser profile.
Open the signed-in [dashboard or test page] and inspect record [record ID].
Do not edit, save, submit, publish, or change filters.
Return a draft named "[page] read check — Grok 4.5 — [date]" with:
- the visible page heading and record ID
- the values shown for [field A] and [field B]
- the visible date range or filter
- the label or source URL for each value
- any value you could not verify
Stop at the draft. I will compare it with the page before using another model or changing anything.The bracketed items are placeholders. The draft is an illustrative output format, not a Grok 4.5 test result. If you run a second model, use the same page and prompt and title the second draft with that model's exact name. Compare only observed fields and report disagreements. Do not put confidential dashboard content into prompts unless your organization has approved that use.
| What happened | Check before the next step |
|---|---|
| The page title or record ID differs | Confirm the profile, page, and client tab before comparing models |
| Grok 4.5 reports a value not visible on the page | Mark it unverified; do not invent a source |
| Two model runs disagree | Compare each answer against the visible source and preserve both drafts |
| A control needs to be clicked to reveal data | Inspect the effect first; ask before any consequential change |
| The draft is ready to share | Verify the full text and links; a person decides whether to submit it |
Keep a named draft for review
Save the first result in the agent conversation as Dashboard read check — Grok 4.5 — 2026-11-10. Include the page heading, record ID, date range, visible values, and a source link for each value. Then compare it with the open Tabbit tab. A second run can be named Dashboard read check — [other exact model] — 2026-11-10. Keeping the two drafts separate makes disagreements easy to inspect without suggesting that either answer was automatically correct.
A Reddit user discussing Hermes Agent said they preferred Grok 4.5 with low reasoning for routine workflow jobs, while reserving higher reasoning for harder tasks. Another user filed a GitHub issue about a Cursor + Grok 4.5 browser task that stopped after a plausible partial result. These are reports about different clients and tasks, not measurements of Tabbit or evidence that the same behavior occurs for everyone. They support a practical rule: make the requested end condition explicit, check the page evidence, and do not mistake a polished partial summary for task completion. Original Reddit discussion · Original browser-task issue.
Troubleshoot the layer that failed
If the API returns “model not found,” check that you selected grok-4.5 and that the xAI account can use it. If Cursor's picker shows Grok 4.6 or 4.7 but not Grok 4.5, do not assume a newer route is interchangeable; check your plan, team settings, and current model list. If /tabbit is missing, verify the skill directory and the client's local skill discovery. If the command is found but no tab opens, test the installed CLI. If the task opens a login page, authenticate yourself in the target Tabbit Browser profile. These are separate issues, so changing the model will not repair a browser session or a missing local launcher.
Verdict
Use Grok 4.5 for a signed-in browser task only when the exact model is available in a local client and the Tabbit CLI connection works. Compare it on the same visible page and with the same read-only instruction, leave a named draft with source links, and stop for human review before an update. For general Tabbit CLI setup, use the CLI complete guide; do not treat Grok 4.6 or 4.7 as aliases for 4.5.
For other local client instructions, see the Pi browser-use guide, Codex and Tabbit CLI setup, and Claude Code setup.
FAQ
Can Grok 4.5 open my signed-in browser by itself?
No. Grok 4.5 is a model. A host client must provide a browser tool. With a local client and the Tabbit CLI skill, the task can use the current Tabbit Browser environment after you sign in to the site yourself.
Where can I select Grok 4.5 today?
xAI documents the API model ID `grok-4.5`. Cursor currently lists Grok 4.5 in its model picker and documents Agent tools including Browser and shell. Check the exact model in your account because plan and organization access can vary.
Is Grok 4.5 the same route as Grok 4.6 or Grok 4.7?
No. They are separate model names and routes. Use the exact `grok-4.5` entry for this guide; do not substitute a Grok 4.6 or 4.7 route or a generic latest label.
Does the Tabbit skill sign me into a website?
No. Sign in in the target Tabbit Browser profile before the task. Tabbit CLI may reuse that environment's existing session where the site allows it.
How can I compare Grok 4.5 results fairly?
Use the same authorized page, record ID, and instructions in each run. Ask both runs for visible fields and source URLs, then compare them with the page. A small repeatable check is not a benchmark of overall model quality.
Can I keep working in other browser tabs?
Yes. Tabbit CLI uses a separate task tab, so you can continue researching or reviewing elsewhere. Check the task tab and review any proposed change before applying it.