Last refreshed 2026-10-18. Next refresh: weekly.
Why use Grok 4 Fast Reasoning on xAI Console?
xAI Console offers Grok 4 Fast Reasoning. xAI, founded by Elon Musk in March 2023, focuses on advancing scientific discovery and understanding the universe through AI.
Compare Grok 4 Fast Reasoning across 2 providers to find the best fit for your use caseInput / 1M
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Output / 1M
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Cache
Not sourced
Batch
Not sourced
Setup recipe
Docs fallbackInstall
Use the provider REST API or SDKAuth
Create a provider API keyCall
model: grok-4-fast-reasoningModel ID
grok-4-fast-reasoningRequest example
Curated snippets for this provider are not sourced yet. Use xAI Console documentation with model ID
grok-4-fast-reasoning.Gotchas
No curated gotchas have been sourced for this exact provider/model route yet.
Compare Grok 4 Fast Reasoning Across Providers
| Provider | Input (per 1M) | Output (per 1M) |
|---|---|---|
| Microsoft Foundry | — | — |
| xAI Console | — | — |
Capabilities
VisionMultimodalReasoning
About Grok 4 Fast Reasoning
Grok 4 Fast Reasoning is a September 2025 xAI model retiring on 2026-05-15; use Grok 4.3 for current API work.
Get Started
Model Specs
Released2025-09-01
Context2M
ArchitectureDecoder Only