Mistral Medium 3.5vsGPT-4o mini
Mistral Medium 3.5 | GPT-4o mini | |
|---|---|---|
| Specifications | ||
Parameters | 128B | — |
Context window | 256k | 128k |
| Benchmarks | ||
Nonsense detection BullshitBench v2Given a confidently-worded but nonsensical prompt, does the AI spot that it makes no sense and push back — instead of playing along and inventing an answer? The score is how often it clearly called out the nonsense. Higher is better. | — | 2% |
Coding SWE-Bench VerifiedReal coding tasks pulled from open-source projects — the AI has to find and fix actual bugs. A human-checked version of the original SWE-Bench. Higher is better. | 77.6% | — |
Science GPQA DiamondGraduate-level science questions in biology, physics, and chemistry — hard enough that subject-matter PhDs score around 65%. Higher is better. | — | 40.2% |
Community preference (code) Arena Elo (Code)Like the text arena, but people vote on which AI writes better code. The votes become a chess-style Elo rating on arena.ai. Higher is better. | 1267 | — |
| Overview | ||
| Company | Mistral | OpenAI |
| Release date | Apr 29 2026 | Jul 18 2024 |
| Access | Open Weight | Proprietary |
Which is better: Mistral Medium 3.5 or GPT-4o mini?
Mistral Medium 3.5 and GPT-4o mini don't publish scores on any of the same benchmarks, so there's no direct head-to-head comparison. GPT-4o mini shipped 650 days before Mistral Medium 3.5, so benchmark comparisons should account for the intervening progress.
Context windows are 256k (Mistral Medium 3.5) vs 128k (GPT-4o mini). Mistral Medium 3.5 is open weight, while GPT-4o mini is proprietary.
Direct benchmark comparisons are unavailable — Mistral Medium 3.5 and GPT-4o mini don't publish scores on any of the same benchmarks.
Frequently asked questions
Mistral Medium 3.5 was released by Mistral on Apr 29 2026.
GPT-4o mini was released by OpenAI on Jul 18 2024.
Mistral Medium 3.5 has a 256k context window; GPT-4o mini has 128k.
Mistral Medium 3.5 is an open weight model released by Mistral. GPT-4o mini is a proprietary model released by OpenAI.