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Last scan 2026-09-15 Models tracked 259 Providers 32 Cheapest paid Granite 4.0 H Micro $0.017/Mtok in Every price links to its source

Grok 4.1 Fast

by xAI

Retired budget cheap tier
Email me when Grok 4.1 Fast gets cheaper
Retired on . No longer served on the endpoint we price — the figures below are kept for historical reference only. Replaced by Grok 4.3. Full retirement status & replacements →
Availability: xAI's migration notice lists grok-4-1-fast-reasoning and grok-4-1-fast-non-reasoning among the models retired from the xAI API effective 2026-05-15 12:00 PM PT, with grok-4.3 as the redirect target. The model is absent from the current docs.x.ai model list, so the $0.20/$0.50 rate is a historical price and is no longer purchasable under this name.

Today's price · per 1M tokens

Input

$0.200

per 1M tokens

Output

$0.500

per 1M tokens

Blended

$0.275

blended $/1M — 3:1 weighted input:output

Source: official xAI pricing · read MODELPRICEWATCH.COM · 2026-09-15

Price receipt

Historical price.This model is retired — withdrawn on — so the provider no longer sells it and its page can no longer confirm this number: a price for a model no longer on sale is unconfirmable by definition, not missing. The figures above are the last prices we recorded for this model, kept as a historical record rather than a live quote.

Overview

Ultra-fast Grok with 2M context, $0.20/$0.50 per 1M. Retired from the xAI API 2026-05-15; xAI redirects it to Grok 4.3.

Capabilities

struck through = not supported
Input 2/5
Text ✓ Image ✓ Audio Video PDF
Output 1/5
Text ✓ Image Audio Video Embedding
Features 3/9
Prompt caching Reasoning Coding Fast inference ✓ Long context ✓ Open weights Multimodal ✓ Web search Realtime

Benchmark performance

accuracy % · higher is better
Percentile vs all tracked models 40.5th1 independent measurement
Percentile per $/Mtok 144.6
GPQA Diamond vendor
62%
SWE-Bench Verified vendor
40%
Humanity's Last Exam vendor
20%
ARC-AGI 2 vendor
25%
AIME 2025 vendor
65%
MMMLU vendor
78%
BFCL vendor
68%
HumanEval vendor
83%
MATH 500 vendor
72%

Every per-benchmark score we hold for this model is reported by its own vendor, so none is counted toward an accuracy average or any ranking. The percentile above is its standing across the independent composites below.

Independent composite scores
  • LMSYS Chatbot Arena: 1430.3 ELO (Human preference)
How it stacks up
  • Ranks #101 of 181 comparably-measured models by percentile score, across 1 independent measurement
  • Ranks #14 of 181 comparably-tested models by normalized performance per dollar

300 tokens/sec output

Source: LMSYS Chatbot Arena (UC Berkeley), xAI model card · updated · See full rankings →

Specifications

Provider
xAI
Context window
2M tokens
Modality
text, image
Parameters
Proprietary
Open source
No — proprietary
Released
Status
Retired ended
Last updated
Tags
budgetfastmultimodalretired

Availability verified: — per xAI's own deprecation notice

Try on xAI Official pricing page