Grok 4.1 Reasoning is xAI's language model with a 2.0M context window and up to 30K output tokens, available from 3 providers, starting at $0.2 / 1M input and $0.5 / 1M output. The reasoning-enabled variant of xAI's Grok 4.1 Fast, combining a 2M context window with chain-of-thought capabilities for complex agentic tasks.
Specifications
Canonical IDxai-grok-4-1-reasoning
TypeLanguage
StatusDeprecated
CreatorxAIxAI
Providers
Context Window2.0M tokens
Max Output30K tokens
Input ModalitiesAudioImagePDFText
Output ModalitiesText
Reasoning Effortsdefault
Release Date · 11 months ago
Deprecation Date
Benchmarks
Intelligence Index
#172
Math Index
#42
MMLU-Pro
#29
GPQA
#100
HLE
#148
LiveCodeBench
#26
IFBench
#164
Time to First Token
#316
SciCode
#106
AIME 2025
#42
LCR
#105
TerminalBench Hard
#139
TAU2
#43
Output TPS
#561

Capabilities

Input4/5
Text✓
Image✓
Audio✓
Video·
PDF✓
Output1/5
Text✓
Image·
Audio·
Video·
Embedding·
Capabilities5/13
Reasoning✓
Adaptive Reasoning·
Function Calling✓
Parallel Function Calling·
Structured Outputs✓
Native JSON Schema·
Web Search✓
URL Context·
Computer Use·
Code Execution·
File Search·
Prompt Caching✓
Assistant Prefill·

Pricing by Provider

US Dollar ($)
Per 1M tokens
ProviderStandard
Input
$ / 1M
Output
$ / 1M
Cache Read
$ / 1M
Azure AI Foundry logo
Azure AI Foundry
azure_ai/grok-4-1-fast-reasoning
$0.2$0.5N/A
Google Vertex AI logo
Google Vertex AI
vertex_ai/xai/grok-4.1-fast-reasoning
$0.2$0.5$0.05
Vercel AI Gateway logo
Vercel AI Gateway
spacexai/grok-4.1-fast-reasoning
$0.2$0.5$0.05

Cost Calculator

US Dollar ($)
Preset:

Versions

VersionReleasedContextInput / 1MOutput / 1MStatus
Grok 4.7524K$2.00$6.00Available
Grok 4.6524K$2.00$6.00Available
Grok 4.5500K$2.00$6.00Available
Grok 4.31.0M$1.25$2.50Available
Grok 4.202.0M$1.25$2.50Available
Grok 4.20 Multi-Agent2.0M$1.25$2.50Available
Grok 4.20 Multi-Agent Beta2.0M$1.25$2.50Available
Grok 4.20 Non-Reasoning2.0M$1.25$2.50Deprecating
Grok 4.20 Reasoning2.0M$1.25$2.50Deprecating
Grok 4.1 Reasoning2.0M$0.200$0.500Current
Grok 4.1 Fast2.0M$5.00$25.00Deprecated

Model IDs

azure_ai/grok-4-1-fast-reasoning
grok-4-1-fast-reasoning
grok-4.1-fast-reasoning
publishers/google/models/grok-4.1-fast-reasoning
spacexai/grok-4.1-fast-reasoning
vertex_ai/xai/grok-4.1-fast-reasoning
xai-grok-4-1-reasoning
xai/grok-4-1-fast-reasoning
xai/grok-4-1-fast-reasoning-latest
xai/grok-4.1-fast-reasoning