This model was retired on 2026-05-15. The pricing below is the last-known rate, kept for migration reference.
Grok 4.1 Fast ReasoningDeprecated
VisionTool useReasoningAudioPrompt cachingStructured outputWeb search
Context
2M
Max output
2M
Serving providers
3
Cheapest input
$0.20 /1M
Prices are on-demand list rates. Enterprise commitments (committed-use discounts, provisioned throughput, negotiated rates) can be materially lower.
Benchmarks
independent evaluations · source: Artificial AnalysisHeadline indices
Intelligence Index
30.6
of 100
Individual benchmarks · click a row for effort variants
| Benchmark | Best score | Effort | Cost / task | |
|---|---|---|---|---|
| CritPt | 3% | default | — | |
| GPQA Diamond | 85% | default | — | |
| Humanity's Last Exam | 18% | default | — | |
| IFBench | 53% | default | — | |
| LiveCodeBench | 82% | default | — | |
| Long-Context Reasoning | 68% | default | — | |
| MMLU-Pro | 85% | default | — | |
| MMMU-Pro | 63% | default | — | |
| Omniscience | -28.7 | default | — | |
| SciCode | 44% | default | — | |
| TerminalBench Hard | 24% | default | — | |
| τ²-bench | 93% | default | — |
Pricing by serving provider
last-known · per 1M tokens · click a provider to expand| Serving provider | Input /1M | Output /1M | Endpoints | |||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Azure | $0.20 | $0.50 | 1 | |||||||||||||||||||||
| ||||||||||||||||||||||||
| xAI | $0.20 | $0.50 | 1 | |||||||||||||||||||||
| ||||||||||||||||||||||||
| Vertex AI | $0.20 | $0.50 | 1 | |||||||||||||||||||||
| ||||||||||||||||||||||||
Price history
input + output $/1M since we started tracking Input Output
Cost calculator
estimate your monthly spend on this model$80
estimated / month
Model IDs
copy the exact identifier for your platformazure_ai/grok-4-1-fast-reasoningxai/grok-4-1-fast-reasoningvertex_ai/xai/grok-4.1-fast-reasoning
Frequently asked questions
Grok 4.1 Fast Reasoning pricing, context and availabilityIs Grok 4.1 Fast Reasoning still available?
Grok 4.1 Fast Reasoning was retired on 2026-05-15. The pricing on this page is the last-known rate, kept for migration reference.
How much did Grok 4.1 Fast Reasoning cost?
Grok 4.1 Fast Reasoning's last-known pricing, before it was retired on 2026-05-15, was $0.20 per 1M input tokens and $0.50 per 1M output tokens.
What was the context window of Grok 4.1 Fast Reasoning?
Grok 4.1 Fast Reasoning had a 2M token context window and could return up to 2M output tokens.
What could Grok 4.1 Fast Reasoning do?
Grok 4.1 Fast Reasoning supported image input (vision), tool use, reasoning, audio input, prompt caching, structured output and web search.
Other xAI models
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