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Aug 28, 2026 · Catalog foundation is up

Product feature · models-context

Model fallbackCommon product term

Switch to another model after a documented failure condition.

Terminology basis: Common product term. xAI — Grok Bot for teams and enterprises

Model fallback: 2 supported, 0 partial, 0 unsupported, 29 unreviewed across 31 cataloged products.

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Explore this familyMore in Models and context11 capabilities

Current evidence by product

Can my agent use Model fallback?

Read across for the answer. 2 of 31 current product columns have reviewed evidence; unreviewed does not mean unsupported.

Known issues (0)Report an issue
  • Supported2
  • Partial0
  • Unsupported0
  • Unknown29
  • Not applicable0

Web

9 products

Desktop

13 products

CLI

9 products

Unknown means no public evidence has been reviewed for that product and capability. It does not mean unsupported.

How statuses are assigned

Definition and scope

What this capability means

This row tracks whether a harness may retry or continue with a different model and what control the operator has over that change. Transparent, configurable fallback is distinct from silent automatic routing.

Evidence should record triggers, candidate models, changes in context or tool compatibility, whether the operator is notified, how provenance appears in logs or exports, and whether regulated or reproducible workflows can disable fallback.

Traceable compatibility

Assertion ledger

Documentation evidence only. No runtime conformance test is implied.

Grok Botdesktop · current
Supported
Target
2026-08-28 Grok Bot desktop documentation observation · hosted-observation
Environment
hosted-default
Observed
2026-08-28
  • runtimeautomatic failover is documented and the serving model appears in usage analytics, but the operator cannot configure, select, or prevent fallback
Evidence
Gemini CLIcli · current
Supported
Target
2026-08-28 Gemini CLI documentation observation · hosted-observation
Environment
local-default
Observed
2026-08-28
  • runtimemodel fallback is enabled by default and can trigger after quota or server errors; the CLI normally prompts for consent before switching
  • policya routing policy can permit silent fallback for the current turn or remainder of the session; internal utility calls have a separate silent fallback chain
  • runtimethe reviewed page identifies fallback behavior but does not provide an exported per-turn routing provenance record
Evidence
  1. 1. Evidence checked 2026-08-28: xAI documents automatic model failover for Grok Bot and says usage analytics show the model that actually served each request, including failovers. Users and administrators cannot choose models or disable fallback.
  2. 2. Evidence checked 2026-08-28: Gemini CLI enables model fallback by default after quota or server errors, normally prompts before switching, and can apply policy-authorized silent fallback for a turn or session. Some internal utility calls use a separate silent fallback chain.