Mistral or ChatGPT for writing in English?
The European contender against the market leader, on the same English prompts, in blind duels. The gap is larger than the marketing suggests; this page shows how large, and in which kinds of writing.
The verdict
GPT-6.1 Sol by OpenAI (thinking high) writes better English than Mistral Large 4 by Mistral AI (thinking high) in our blind duels: rank 1 against rank 35 on the leaderboard, score 95.7 against 66.5.
Head to head, Mistral takes 0.0% of the points over 5 direct duels (0 wins, 0 ties, 5 losses). Mistral leads in 1 of the 9 kinds of writing where both have been judged, ChatGPT in 8.
| Model | Rank | Score | Duels |
|---|---|---|---|
Mistral  Mistral Large 4 💡 | 35 | 66.5 | 484 |
ChatGPT  GPT-6.1 Sol 💡 | 1 | 95.7 | 2,597 |
Each side is its best-ranked variant in this edition: Mistral Large 4 by Mistral AI (thinking high) for Mistral, GPT-6.1 Sol by OpenAI (thinking high) for ChatGPT. When a better variant of either arrives, this page follows it.
Kind of writing by kind of writing
Score and rank recomputed on the duels of each category alone; the leader is in colour. Click a kind of writing for its full ranking.
| Kind of writing | Mistral | ChatGPT | Direct duels |
|---|---|---|---|
| Articles, blogs and editorial | 54.4 #49 | 97.4 #1 | 0–0–1 |
| Dialogue and screenplay | 60.6 #42 | 98.3 #1 | 0–0–1 |
| Explanation and popularization | 82.1 #15 | 72.7 #22 | — |
| Fiction and narrative | 79.1 #28 | 95.7 #6 | — |
| Marketing and sales | 76.1 #21 | 94.3 #6 | 0–0–1 |
| Personal communication | 77.5 #25 | 97.5 #2 | — |
| Professional and administrative | — | 85.3 #5 | — |
| Social media and short formats | 72.5 #28 | 96.8 #1 | 0–0–1 |
| Speech and public speaking | 87.3 #17 | 98.2 #1 | 0–0–1 |
| Structured documents and reports | 30.5 #75 | 97.3 #1 | — |
Direct duels read wins–ties–losses for the first model. A dash means the model has not yet been judged in that category.
What each side stands for
“Mistral” is the Mistral AI model that ranks highest on the English leaderboard at export time, whether it ran in the cloud or as an open-weight file on our own machine; “ChatGPT” is the best-ranked OpenAI model. Mistral’s consumer app was renamed Vibe in May 2026; the models behind it are the ones measured here.
What the numbers measure
Blind duels: two anonymous texts for the same English prompt, an AI judge picking the better one without seeing the names. The direct record counts only the duels where these two variants met, and the kind-of-writing table recomputes the ranking one category at a time.
How to read a lopsided result
A one-sided head-to-head does not mean Mistral writes badly; it means that, judged blind against the current OpenAI model on these prompts, it loses most of the time. Reasons to pick Mistral anyway exist, from European hosting to open weights you can run offline, and they are real. They are just not writing quality, which is the only thing this page measures.
Writing example
Prompt
Write a short opinion snippet (50–150 words) for a local newspaper's blog arguing that the town should keep its public library open on Sundays. Make the case that weekends are when working parents, students, and shift workers have the most free time, that the library is one of the few free indoor spaces open to everyone, and that closing on Sundays quietly excludes the people who need it most. Adopt a persuasive, community-minded voice and end with a memorable closing line.
Published verdict: ChatGPT (judged by GPT-6 Sol).
Mistral · Mistral Large 4 💡
Our library is the living room of this town, yet it locks its doors every Sunday—when working parents, students, and shift workers finally have time to breathe after a long week. The weekend is when those who juggle Monday-through-Saturday shifts or carve out study hours between jobs can actually use what we offer. The library remains one of the few free indoor spaces where everyone belongs, regardless of wallet or background. Closing on Sundays doesn't balance budgets; it quietly locks out the neighbors who need us most. We are better than a town that turns its back on its busiest families. Keep the doors open on Sundays—because a community that closes its library on the weekend admits it only serves the already comfortable.
ChatGPT · GPT-6.1 Sol 💡
A public library should be open when the public can use it. For working parents juggling jobs and school pickups, students facing Monday deadlines, and shift workers whose schedules rarely fit office hours, Sunday may be the only chance to visit.
Our library is also one of the few indoor places where everyone is welcome without buying anything. It offers warmth, internet access, a quiet desk, and room to read together. Those are everyday necessities, not weekday luxuries.
Closing on Sundays might look like a tidy budget decision, but it quietly shuts out neighbors with the fewest alternatives. Let’s fund Sunday hours and keep this shared space available.
A town’s doors should open widest when its people finally have time to walk through them.
