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Mistral: Mistral Medium 3.5 vs OpenAI: GPT-5.4 Mini

Side-by-side comparison of specs, pricing, benchmark scores, and task rankings. Updated 2026-06-19.

Mistral: Mistral Medium 3.5 OpenAI: GPT-5.4 Mini
Vendormistralaiopenai
Quality Score100100
Benchmark Score63.381.0
Input Price$1.50/M$0.75/M
Output Price$7.50/M$4.50/M
Context Window262,144400,000
Max Output-128,000
Tool Calling✓✓
Structured Output✓✓
Reasoning Mode✓✓
Vision✓✓
Audio--
Benchmark Scores
ai_index49.466.0
ai_index_agentic87.797.1
ai_index_coding58.484.9

Who wins by task?

TaskMistral: Mistral Medium 3.5OpenAI: GPT-5.4 Mini
SQL Generation 158 169
Code Review 151 163
Code Completion 116 132
Code Refactoring 147 161
Bug Fixing 165 179
Unit Test Generation 142 151
Code Documentation 132 141
Regex Writing 130 134
CI/CD Pipelines 134 142
Frontend Component Design 139 144
Data Analysis 160 169
CSV / Spreadsheet Cleanup 141 151
ETL Scripting 140 151
JSON Extraction 133 146
Bulk Data Labeling 123 133
OCR / Document Parsing 138 144
Table Extraction from PDFs 138 144
Long-Document Summarization 144 157
Short-Form Summarization 120 130
Blog Post Writing 131 138

Scores reflect capability match + benchmark data + pricing for each task. Methodology →

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