GPT-4o mini vs Grok 4.1 Fast: Pricing Comparison
Compare pricing, capabilities, and costs for your LLM workloads.
OpenAI
GPT-4o mini
Pricing (per 1M tokens)
Input$0.1500
Output$0.6000
Cached Input$0.0750
Batch Input$0.0750
Batch Output$0.3000
Context & Output
Context Window128K tokens
Max Output16.4K tokens
Capabilities
Categorybudget
Multimodaltext + image
Fine-tuningYes
StreamingYes
xAI
Grok 4.1 Fast
Pricing (per 1M tokens)
Input$0.2000
Output$0.5000
Cached Input$0.0500
Context & Output
Context Window2M tokens
Max Output16K tokens
Capabilities
Categorymid
Multimodaltext + image
Fine-tuningNo
StreamingYes
Quick Verdict
Cheaper Input Price
GPT-4o mini
25.0% cheaper
Cheaper Output Price
Grok 4.1 Fast
16.7% cheaper
Larger Context Window
Grok 4.1 Fast
+1.9M tokens
Cost Comparison
Sample workload: 1,000,000 input tokens + 1,000,000 output tokens
GPT-4o mini
$0.7500
$0.1500/1M input + $0.6000/1M output
Grok 4.1 Fast
$0.7000
$0.2000/1M input + $0.5000/1M output
Grok 4.1 Fast is 6.7% cheaper for this workload.
Frequently Asked Questions
Which is cheaper, GPT-4o mini or Grok 4.1 Fast?
For input tokens, GPT-4o mini is cheaper at $0.1500 per 1M tokens. For output tokens, Grok 4.1 Fast is cheaper at $0.5000 per 1M tokens. The overall cost depends on your workload's input/output ratio.
What is the context window size of GPT-4o mini vs Grok 4.1 Fast?
GPT-4o mini has a context window of 128K tokens, while Grok 4.1 Fast has 2M tokens. Grok 4.1 Fast supports a larger context window of 2M tokens, which is beneficial for processing longer documents.
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