GPT-5.1 vs Grok 4.3: Pricing Comparison
Compare pricing, capabilities, and costs for your LLM workloads.
OpenAI
GPT-5.1
Pricing (per 1M tokens)
Input$1.25
Output$10.00
Cached Input$0.1250
Context & Output
Context Window400K tokens
Max Output128K tokens
Capabilities
Categoryflagship
Multimodaltext + image
Fine-tuningNo
StreamingYes
xAI
Grok 4.3
Pricing (per 1M tokens)
Input$1.25
Output$2.50
Cached Input$0.2000
Context & Output
Context Window1M tokens
Max Output32.8K tokens
Capabilities
Categoryflagship
Multimodaltext + image
Fine-tuningNo
StreamingYes
Quick Verdict
Cheaper Input Price
Grok 4.3
0.0% cheaper
Cheaper Output Price
Grok 4.3
75.0% cheaper
Larger Context Window
Grok 4.3
+600K tokens
Cost Comparison
Sample workload: 1,000,000 input tokens + 1,000,000 output tokens
GPT-5.1
$11.25
$1.25/1M input + $10.00/1M output
Grok 4.3
$3.75
$1.25/1M input + $2.50/1M output
Grok 4.3 is 66.7% cheaper for this workload.
Frequently Asked Questions
Which is cheaper, GPT-5.1 or Grok 4.3?
For input tokens, Grok 4.3 is cheaper at $1.25 per 1M tokens. For output tokens, Grok 4.3 is cheaper at $2.50 per 1M tokens. The overall cost depends on your workload's input/output ratio.
What is the context window size of GPT-5.1 vs Grok 4.3?
GPT-5.1 has a context window of 400K tokens, while Grok 4.3 has 1M tokens. Grok 4.3 supports a larger context window of 1M tokens, which is beneficial for processing longer documents.
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