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Head to head · Assistant proactive · October 2026 research run

Gemini Spark vs Grok Bot

Grok Bot scores 45.2 (E) on agent readiness against Gemini Spark's 24.5 (F), and leads in every scored category. Both do assistant proactive.

Best AI personal assistants that act for one person · All 190 assistants comparisons

Gemini SparkGoogle LLC · Platform F24.5/100#974 of 986 Grok BotSpaceXAI and Cursor (Anysphere, Inc.) · Platform E45.2/100#893 of 986

Which one, for what

Gemini Spark F

Best for A person who already keeps mail, calendar and files in a personal Google Account and accepts Keep Activity being on.

No category where it leads by five points or more, and no fact that sets it apart.

Watch for

No public API, SDK or MCP server for an outside agent was found. Spark is reached in the Gemini mobile app, the Mac app and gemini.google.com

Grok Bot E

Best for A person or team already paying for Cursor or SuperGrok who wants named assistants that keep working on a cloud computer, with routines and Slack or X entry points, and who will write approval rules.

Ahead on

  • Reliability, 40 against 14
  • Schema & documentation, 40 against 17
  • Agent ergonomics, 50 against 9
  • Security & auth, 68 against 60
  • Payments & pricing, 25 against 10
  • Transparency & trust, 66 against 49

Watch for

All of one user's Bots share one cloud computer, with its files, browser sessions and command-line credentials. The docs say separate Bots are not a security boundary

Score by category

CategoryWeight this runGemini SparkGrok BotEdge
Reliability16%201440Grok Bot +26
Performance10%pendingpendingpendingnot scored in this run
Schema & documentation13%16.21740Grok Bot +23
Agent ergonomics13%16.2950Grok Bot +41
Security & auth14%17.56068Grok Bot +8
Payments & pricing10%12.51025Grok Bot +15
Task success10%pendingpendingpendingnot scored in this run
Maintenance & community7%8.81720Grok Bot +3
Transparency & trust7%8.84966Grok Bot +17
Negative events≤1500
TotalF 24.5/100E 45.2/100

Facts side by side

FactGemini SparkGrok Bot
KindPlatformPlatform
VendorGoogle LLCSpaceXAI and Cursor (Anysphere, Inc.)
Hosted endpointno (local only)no (local only)
Transports
AuthOAuthOAuth or key
PricingPaidPaid
x402nono
LicenceProprietary hosted service under the Google Terms of ServiceProprietary
Read-only variant documentednono
llms.txtnoyes
Last release2026-05-19none
Terms last updated2026-07-302026-09-03
Privacy policy last updated2026-09-242026-09-29
Customer content may train modelsyes, with an opt-outnot found in the text
Terms restrict automated accessyesnot found in the text
Terms restrict benchmarkingnot found in the textnot found in the text
Terms or service can change without noticenot found in the textnot found in the text
Arbitration or class-action waivernot found in the textnot found in the text

Verdicts

Gemini Spark

Google's help pages state what Spark confirms before doing, how to delete its remote browser and code data, and the risks of prompt injection. Spark has no public API, Google calls it experimental, and it runs only with Keep Activity on, the setting under which chats are used for model training and human review.

Grok Bot

Connector tokens stay on Cursor's backend and each user gets a separate microVM, with approvals, drafts and a review model before risky actions. All of a user's Bots share one computer and its sign-ins, the review model skips memory writes, and the status page shows seven major Grok Bot incidents since 3 September 2026.

Before you call either

Gemini Spark

  1. Do not plan an integration against Spark. No public API or MCP server was found, and a person must hold a Google AI Pro or Ultra subscription
  2. Expect a confirmation request before sends, edits, purchases and web form submissions, and note that bulk changes to private Google Tasks run without one
  3. Delete remote browser data and remote code execution data in Gemini Spark Settings after a sensitive session. Deleting a task thread or Gemini Apps activity does not remove them
  4. Keep within 15 running tasks and 50 active schedules. A schedule does not run when 15 tasks are running or the usage limit is reached
  5. Treat every safety statement here as Google's own description. None was tested, and no message was sent to the service

Grok Bot

  1. State in each request what the Bot may change and where it must stop. Which actions pause for approval depends on the tool, the risk and the owner's Auto-review rules
  2. Add narrow Ask first rules for sending, publishing, purchasing and deleting. Ask first wins over Allow automatically when both match
  3. Treat any sign-in or file on the cloud computer as available to every Bot on the account. Give a workload its own Cursor user when it needs separate credentials
  4. Run Test run with safe inputs. A test run performs real work and can call connected tools
  5. To remove access, pause routines, sign out of sites on the computer, uninstall connectors and revoke them at the source service. Deleting the Bot is not enough

Questions

Which is better for AI agents, Gemini Spark or Grok Bot?

Grok Bot scores 45.2 (E) on agent readiness against Gemini Spark's 24.5 (F), and leads in every scored category.

Other comparisons with Gemini Spark or Grok Bot

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