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

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 Nano
Vendormistralaiopenai
Quality Score100100
Benchmark Score63.370.5
Input Price$1.50/M$0.20/M
Output Price$7.50/M$1.25/M
Context Window262,144400,000
Max Output-128,000
Tool Calling✓✓
Structured Output✓✓
Reasoning Mode✓✓
Vision✓✓
Audio--
Benchmark Scores
ai_index49.463.1
ai_index_agentic87.778.5
ai_index_coding58.472.4

Who wins by task?

TaskMistral: Mistral Medium 3.5OpenAI: GPT-5.4 Nano
SQL Generation 158 164
Code Review 151 159
Code Completion 116 133
Code Refactoring 147 158
Bug Fixing 165 173
Unit Test Generation 142 148
Code Documentation 132 141
Regex Writing 130 133
CI/CD Pipelines 134 139
Frontend Component Design 139 141
Data Analysis 160 163
CSV / Spreadsheet Cleanup 141 149
ETL Scripting 140 148
JSON Extraction 133 144
Bulk Data Labeling 123 134
OCR / Document Parsing 138 143
Table Extraction from PDFs 138 143
Long-Document Summarization 144 155
Short-Form Summarization 120 130
Blog Post Writing 131 137

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

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