GPT-5.1 vs Mistral Medium 3.5: 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
Mistral
Mistral Medium 3.5
Pricing (per 1M tokens)
Input$1.50
Output$7.50
Context & Output
Context Window256K tokens
Max Output32.8K tokens
Capabilities
Categoryflagship
Multimodaltext
Fine-tuningNo
StreamingYes
Quick Verdict
Cheaper Input Price
GPT-5.1
16.7% cheaper
Cheaper Output Price
Mistral Medium 3.5
25.0% cheaper
Larger Context Window
GPT-5.1
+144K 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
Mistral Medium 3.5
$9.00
$1.50/1M input + $7.50/1M output
Mistral Medium 3.5 is 20.0% cheaper for this workload.
Frequently Asked Questions
Which is cheaper, GPT-5.1 or Mistral Medium 3.5?
For input tokens, GPT-5.1 is cheaper at $1.25 per 1M tokens. For output tokens, Mistral Medium 3.5 is cheaper at $7.50 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 Mistral Medium 3.5?
GPT-5.1 has a context window of 400K tokens, while Mistral Medium 3.5 has 256K tokens. GPT-5.1 supports a larger context window of 400K tokens, which is beneficial for processing longer documents.
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