# Grok 4

Grok 4 je AI model od xAI, vydaný 2025-07-09.

- Vývojář: xAI
- Id: grok-4
- Podle zpráv: 2025-07-09T00:00:00.000Z
- Vydáno: 2025-07-09T00:00:00.000Z
- Zjištění: 2026-09-19T17:20:46.653Z
  - [zdrojový odkaz](https://models.dev/#grok-4)
- Stav: Vydáno
- Dostupnost API: 2025-07-09
  - [zdrojový odkaz](https://docs.x.ai/developers/release-notes#grok-4-is-released)
- Kanonický: https://alexgetman.com/cs/models/xai/grok-4/

## Otázky

### Kdy byl vydán Grok 4?

2025-07-09.

## Časová osa

- 2026-10-07T19:38:07.564Z · [xAI · release notes](https://docs.x.ai/developers/release-notes#grok-4-is-released)
> You can now use Grok 4 via our API or on https://grok.com
- 2026-11-05T17:47:58.156Z · [GitHub · xai-org/grok-build · code](https://github.com/xai-org/grok-build/blob/2bdd1d6a6369de0e8c68132ea4539e9abd9e14a8/crates/codegen/xai-grok-config/src/remote_settings.rs)
> r is the atomic configurable unit because a model is only guaranteed to work with a compatible harness (cursor vs grok-build).
> #[derive(Debug, Clone, PartialEq, Eq, Serialize, Deserialize)]
> pub struct GoalRoleModel {
>     /// Model id, e.g. "grok-4". It resolves against available models at spawn time; unknown or unauthorized fails open to the current model.
>     pub model: String,
>     /// Harness `agent_type` (e.g. "cursor", "grok-build-plan") whose `AgentDefinition` decides the role subagent's harness flavor.
>     /// The flavor (system prompt and cursor-vs-grok-build toolset) applies regardless of the session or parent agent.
>     /// It is resolved by name (project/plugin/builtin lookup, then re-flavored by the subagent toolset resolver).
>     /// The main session's env/ACP/strict-harness precedence chain plays no part.
>     /// It is not a subagent type: the role always spawns
Tato zmínka v kódu nepotvrzuje používaný identifikátor modelu.
- 2026-11-13T18:39:46.933Z · [xAI · official articles](https://x.ai/news/grok-4)

## Zdrojové odkazy

- [Artificial Analysis · benchmarks](https://artificialanalysis.ai/models)
- [xai-release-notes](https://docs.x.ai/developers/release-notes#grok-4-is-released)
- [GitHub · xai-org/grok-build · code](https://github.com/xai-org/grok-build/blob/2bdd1d6a6369de0e8c68132ea4539e9abd9e14a8/crates/codegen/xai-grok-config/src/remote_settings.rs)
- [Azure Foundry · lifecycle](https://learn.microsoft.com/en-us/azure/foundry/concepts/model-lifecycle-retirement?view=azureml-api-2)
- [models-dev](https://models.dev/#grok-4)
- [xai-articles](https://x.ai/news/grok-4)

## Signály

- [Grok 4 spatřen na models.dev](https://alexgetman.com/cs/signals/2026/09/19/grok-4/)