GPT-5.1 vs GPT-5: 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
OpenAI
GPT-5
Pricing (per 1M tokens)
Input$1.25
Output$10.00
Cached Input$0.1250
Batch Input$0.6250
Batch Output$5.00
Context & Output
Context Window400K tokens
Max Output128K tokens
Capabilities
Categoryflagship
Multimodaltext + image + audio
Fine-tuningNo
StreamingYes
Quick Verdict
Cheaper Input Price
GPT-5
0.0% cheaper
Cheaper Output Price
GPT-5
0.0% cheaper
Larger Context Window
GPT-5
+0 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
GPT-5
$11.25
$1.25/1M input + $10.00/1M output
Frequently Asked Questions
Which is cheaper, GPT-5.1 or GPT-5?
For input tokens, GPT-5 is cheaper at $1.25 per 1M tokens. For output tokens, GPT-5 is cheaper at $10.00 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 GPT-5?
GPT-5.1 has a context window of 400K tokens, while GPT-5 has 400K tokens. GPT-5.1 supports a larger context window of 400K tokens, which is beneficial for processing longer documents.
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