Grok-4 Fast vs GPT-5 Mini

Side-by-side comparison of pricing, features, and capabilities

Pricing

Input / 1M tokens
$0.200
$0.300
Output / 1M tokens
$0.500
$1.00
Avg. Cost / 1M
$0.350
$0.650

Specifications

Context Window
256K
128K
Tier
budget
mid
Provider
xAI
OpenAI

Capabilities

Feature
grok-4-fast
gpt-5-mini
text
code

Verdict

Best for Cost

grok-4-fast is 86% cheaper on average

Best for Quality

gpt-5-mini (mid tier) is positioned as higher quality

Best for Long Documents

grok-4-fast has a larger context window (256K)

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