Mistral Medium 3.5vsMistral Small 4
Mistral Medium 3.5 | Mistral Small 4 | |
|---|---|---|
| Specifications | ||
ParametersA rough measure of how big the model is. More parameters usually means more capable and more expensive to run, though it is a poor guide on its own — a smaller, newer model often beats a larger, older one. | 128B | — |
Context windowHow much text the model can hold in mind at once — your question, any documents you attach, the conversation so far, and its own reply. Go past it and the earliest part falls out of view. | 256k | — |
| API pricingUSD per 1M tokens · lower wins | ||
Input priceWhat you pay for everything you send the model — your question, plus any documents or earlier conversation you include with it. | $1.50 | $0.15 |
Output priceWhat you pay for the text the model writes back. It is normally the dearer half: producing an answer costs more than reading one. | $7.50 | $0.60 |
Cheapest inputLowest input rate across third-party providers, excluding the lab itself. The cheapest endpoint may run a quantised build or a shorter context — see "Available from" on the model page. | — | $0.1875Venice |
Cheapest outputLowest output rate across third-party providers, excluding the lab itself. May come from a different provider than the cheapest input. | — | $0.75Venice |
| BenchmarksPublished by one model only | ||
SWE-Bench VerifiedCoding — Real 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% | — |
| Overview | ||
| Company | Mistral | Mistral |
| Release date | Apr 29 2026 | Mar 16 2026 |
| Access | Open Weight | Proprietary |
Other comparisons
Frequently asked questions
Mistral Medium 3.5 and Mistral Small 4 don't publish scores on any of the same benchmarks, so there's no direct head-to-head comparison. Mistral Small 4 is cheaper on both input and output: $0.15 vs $1.50 per million input tokens, and $0.60 vs $7.50 per million output tokens. Mistral Small 4 shipped 44 days before Mistral Medium 3.5, so benchmark comparisons should account for the intervening progress.
Mistral Medium 3.5 is open weight, while Mistral Small 4 is proprietary.
Direct benchmark comparisons are unavailable — Mistral Medium 3.5 and Mistral Small 4 don't publish scores on any of the same benchmarks.
Mistral Medium 3.5 was released by Mistral on Apr 29 2026.
Mistral Small 4 was released by Mistral on Mar 16 2026.
Mistral Small 4 is cheaper on both input and output: $0.15 vs $1.50 per million input tokens, and $0.60 vs $7.50 per million output tokens. Rates are pay-as-you-go API prices verified on August 18, 2026.
Mistral Medium 3.5 is an open weight model released by Mistral. Mistral Small 4 is a proprietary model released by Mistral.