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Grok 4.1 Fast

SpaceXAIReleased Nov 19, 2025Legacy

Score basis

Grok 4.1 Fast is capable in long context; and behind the leaders in reasoning, multimodal tasks, instruction following, factuality, and agentic tasks. Too few results yet to rate coding, safety, math, or multilingual tasks.

Capability profile

Bars show the model's median result as a share of the leading model's, per capability. Select a row to see its results.

Capable1 capability
  1. Long Context−20.3%1 of 3
Limited5 capabilities
  1. Reasoning−31.0%4 of 6
  2. Multimodal−35.3%1 of 6
  3. Instruction Following−37.6%1 of 3
  4. Factuality−38.7%3 of 4
  5. Agentic−40.7%1 of 7
Not rated4 capabilities

Too few results yet to rate Coding, Safety, Math or Multilingual.

Price

$0.20input$0.50outputper million tokens

From x-ai · All prices

Cheaper than 74% of 330 priced models · 3:1 input-to-output blend, log scale

Evidence

44results on28benchmarks

  • 14 independently verified
  • 30 aggregator

From 10 sources · latest Oct 8, 2026 · How verification works

Research

1 paper reference Grok 4.1 Fast

Grok 4.1 Fast benchmark results

44 results on 28 benchmarks, grouped by capability. Each bar is the result as a share of the capability leader's; every result links to its source.

Long Context

CapableFull long context ranking

20.3% behind the leader1 of 3 ranked benchmarks measured

Show 1 more long context resultHide 1 long context result

Reasoning

LimitedFull reasoning ranking

31.0% behind the leader4 of 6 ranked benchmarks measured

Show 3 more reasoning resultsHide 3 reasoning results

Multimodal

LimitedFull multimodal ranking

35.3% behind the leader1 of 6 ranked benchmarks measured

Show 3 more multimodal resultsHide 3 multimodal results

Instruction Following

LimitedFull instruction following ranking

37.6% behind the leader1 of 3 ranked benchmarks measured

Show 1 more instruction following resultHide 1 instruction following result

Factuality

LimitedFull factuality ranking

38.7% behind the leader3 of 4 ranked benchmarks measured

Show 2 more factuality resultsHide 2 factuality results

Agentic

LimitedFull agentic ranking

40.7% behind the leader1 of 7 ranked benchmarks measured

Show 1 more agentic resultHide 1 agentic result

Coding

Not enough dataFull coding ranking

0 of 10 ranked benchmarks measured

Show 2 more coding resultsHide 2 coding results

Math

Not enough dataFull math ranking

0 of 5 ranked benchmarks measured

Show 1 more math resultHide 1 math result

More results

Benchmarks outside the capability baskets. They are not ranked against a leader.

Show 7 more resultsHide 7 results

Grok 4.1 Fast: common questions

Who makes Grok 4.1 Fast?

Grok 4.1 Fast is made by SpaceXAI.

When was Grok 4.1 Fast released?

Grok 4.1 Fast was released on Nov 19, 2025, according to Artificial Analysis.

What is Grok 4.1 Fast good at?

Grok 4.1 Fast is capable in long context; and behind the leaders in reasoning, multimodal tasks, instruction following, factuality, and agentic tasks. Too few results yet to rate coding, safety, math, or multilingual tasks.

How much does Grok 4.1 Fast cost?

Grok 4.1 Fast costs $0.20 per million input tokens and $0.50 per million output tokens, according to x-ai. At a mix of three input tokens to one output token, it is cheaper than 74% of the 330 priced models we track.

How many benchmarks has Grok 4.1 Fast been tested on?

We track 44 results for Grok 4.1 Fast on 28 benchmarks from 10 sources, 14 of them independently verified. The latest was recorded on Oct 8, 2026.

About this record

Where Grok 4.1 Fast's numbers come from, and every name it appears under.

Tracked since
Apr 27, 2026
Newest source mention
Aug 23, 2026

Where the results come from

Verification: 44 scores · 14 independently verified · 30 aggregator-attributed. How these tiers are assigned

From 10 sources on 6 sites. Artificial Analysis supplies 30 of them; the 14 independently verified results come from 5 sites. Bars are coloured by trust tier.

  • artificialanalysis.ai30
  • matharena.ai6
  • raw.githubusercontent.com4
  • datasets-server.huggingface.co2
  • lmarena.ai1
  • simple-bench.com1

Also known as

grok 4.1 fast (non-reasoning)grok-4-1-fast-reasoninggrok-4-1-fast-non-reasoninggrok-4-1-fast (Non-Reasoning)grok-4-1-fast (reasoning)grok-4-1-fastgrok 4.1 fast (reasoning)