DeepSeek-V4-Flash-0731vsMistral Medium 3.5
DeepSeek-V4-Flash-0731 | Mistral Medium 3.5 | |
|---|---|---|
| Specifications | ||
Parameters | — | 128B |
Context window | — | 256k |
| Benchmarks | ||
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% |
Agentic terminal coding Terminal-Bench 2.1Can the AI work in a command-line terminal — running commands and finishing technical setup tasks the way a developer would? Higher is better. | 82.7% | — |
Personal tool use Toolathlon-VerifiedTests how well the AI uses everyday personal tools and apps to get things done — a human-checked version of Toolathlon. Higher is better. | 70.3% | — |
Cybersecurity CyberGymTests the AI on cybersecurity challenges — finding and exploiting software weaknesses inside a safe sandbox. Higher is better. | 76.7% | — |
Business workflows AutomationBenchTests whether the AI can run real multi-step business workflows — the kind of end-to-end office processes companies want to automate — from start to finish. Higher is better. | 25.1% | — |
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 | DeepSeek | Mistral |
| Release date | Jul 31 2026 | Apr 29 2026 |
| Access | Proprietary | Open Weight |
Which is better: DeepSeek-V4-Flash-0731 or Mistral Medium 3.5?
DeepSeek-V4-Flash-0731 and Mistral Medium 3.5 don't publish scores on any of the same benchmarks, so there's no direct head-to-head comparison. Mistral Medium 3.5 shipped 93 days before DeepSeek-V4-Flash-0731, so benchmark comparisons should account for the intervening progress.
DeepSeek-V4-Flash-0731 is proprietary, while Mistral Medium 3.5 is open weight.
Direct benchmark comparisons are unavailable — DeepSeek-V4-Flash-0731 and Mistral Medium 3.5 don't publish scores on any of the same benchmarks.
Frequently asked questions
DeepSeek-V4-Flash-0731 was released by DeepSeek on Jul 31 2026.
Mistral Medium 3.5 was released by Mistral on Apr 29 2026.
DeepSeek-V4-Flash-0731 is a proprietary model released by DeepSeek. Mistral Medium 3.5 is an open weight model released by Mistral.