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Mistral: Mistral Medium 3.5 vs OpenAI: GPT-6.1 Sol Pro

Mistral: Mistral Medium 3.5 is 1.3× cheaper for the sample workload; OpenAI: GPT-6.1 Sol Pro has the larger context window.

MetricMistral: Mistral Medium 3.5OpenAI: GPT-6.1 Sol Pro
Model IDmistralai/mistral-medium-3-5openai/gpt-6.1-sol-pro
Prompt price$1.50 / 1M tokens$2.00 / 1M tokens
Completion price$7.50 / 1M tokens$10.00 / 1M tokens
Context262,144 tokens1,050,000 tokens
Tool calling✓✓
Structured outputs✓✓
Reasoning✓✓
Response format✓✓
Web search––
Input modalitiestext, image, filefile, image, text
Output modalitiestexttext
Added2026-04-302026-09-29

Sample workload

Chat app: 1,000 prompt + 500 completion tokens × 100 requests per day.

CostMistral: Mistral Medium 3.5OpenAI: GPT-6.1 Sol Pro
Per day$0.53$0.70
Per 30 days$15.75$21.00

Difference: $0.18 per day and $5.25 per 30 days.

Data updated 2026-10-30