Mistral Medium 3.5 vs OpenAI o4-mini
Benchmarks, API pricing and specs, head to head. Data updated 2026-06-10.
Mistral Medium 3.5
Mistral AI · Mar 2026
Europe's strongest model line: frontier-adjacent quality at $0.40/$2 with EU data residency and on-prem options.
OpenAI o4-mini
80.9OpenAI · Apr 2025
A compact reasoning model that punched far above its price on math — 92.7% on AIME 2025 at $1.10 per million input tokens.
The verdict
These two models don't yet share verified results on the benchmarks we track, so judge them on specs, pricing and intended use. Mistral Medium 3.5 is about 2.4x cheaper per blended million tokens (3:1 input:output mix). OpenAI o4-mini also takes 200K of context versus 131K for Mistral Medium 3.5.
Specs & pricing
| Mistral Medium 3.5 | OpenAI o4-mini | |
|---|---|---|
| modhub Index | — | 80.9 |
| Input price / 1M | $0.4 | $1.1 |
| Output price / 1M | $2 | $4.4 |
| Context window | 131K | 200K |
| Max output | — | 100K |
| Open weights | no | no |
| Reasoning model | no | yes |
| Multimodal input | text, image | text, image |
| Knowledge cutoff | Dec 2025 | May 2024 |
| Released | Mar 2026 | Apr 2025 |
| Example monthly cost* | $7.00 | $17.60 |
* 10M input + 1.5M output tokens per month at list prices, no caching. Green = better value on that row.
Frequently asked questions
- Which is better, Mistral Medium 3.5 or OpenAI o4-mini?
- These two models don't yet share verified results on the benchmarks we track, so judge them on specs, pricing and intended use. Mistral Medium 3.5 is about 2.4x cheaper per blended million tokens (3:1 input:output mix). OpenAI o4-mini also takes 200K of context versus 131K for Mistral Medium 3.5.
- Which is cheaper, Mistral Medium 3.5 or OpenAI o4-mini?
- Mistral Medium 3.5 costs $0.4/$2 per million input/output tokens, while OpenAI o4-mini costs $1.1/$4.4. For a typical workload of 10M input and 1.5M output tokens per month, that's $7.00 versus $17.60.
- Which model is better for coding, Mistral Medium 3.5 or OpenAI o4-mini?
- We don't yet track SWE-bench Verified results for both models; check their individual pages for coding-related scores.
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