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Mistral: Mistral Medium 3.5 vs OpenAI: GPT-5.4

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
Vendormistralaiopenai
Quality Score100100
Benchmark Score63.394.2
Input Price$1.50/M$2.50/M
Output Price$7.50/M$15.00/M
Context Window262,1441,050,000
Max Output-128,000
Tool Calling✓✓
Structured Output✓✓
Reasoning Mode✓✓
Vision✓✓
Audio--
Benchmark Scores
ai_index49.484.8
ai_index_agentic87.7100.0
ai_index_coding58.494.5
eqbench-82.4

Who wins by task?

TaskMistral: Mistral Medium 3.5OpenAI: GPT-5.4
SQL Generation 158 178
Code Review 151 178
Code Completion 116 120
Code Refactoring 147 175
Bug Fixing 165 194
Unit Test Generation 142 161
Code Documentation 132 147
Regex Writing 130 138
CI/CD Pipelines 134 151
Frontend Component Design 139 151
Data Analysis 160 179
CSV / Spreadsheet Cleanup 141 157
ETL Scripting 140 163
JSON Extraction 133 137
Bulk Data Labeling 123 122
OCR / Document Parsing 138 149
Table Extraction from PDFs 138 149
Long-Document Summarization 144 170
Short-Form Summarization 120 123
Blog Post Writing 131 146

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

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