Mistral Medium 3.5 vs o4-mini
Mistral AI against OpenAI, costed on the same three workloads. o4-mini is cheaper on all three workloads.
Monthly bill, side by side
| Workload | Mistral Medium 3.5 | o4-mini | Difference |
|---|---|---|---|
| Support chatbot 2,500 six-turn conversations a day |
$6,041 | $3,985 | $2,057 (1.5×) |
| Document summariser 1,000 single-shot summaries a day |
$729 | $508 | $221 (+43%) |
| Coding agent 200 twelve-turn sessions a day |
$4,212 | $2,891 | $1,321 (+46%) |
No prompt caching and no batch discount on either side, so the comparison is like for like. Both figures assume 30 days a month.
The rate cards
| Mistral Medium 3.5 | o4-mini | |
|---|---|---|
| Input, per 1M tokens | $1.5 | $1.1 |
| Output, per 1M tokens | $7.5 | $4.4 |
| Cached input | not published | $0.275 |
| Context window | 262K | 200K |
| Maximum output | 262K | 100K |
| Reasoning model | no | yes |
| Vision | yes | yes |
Run this comparison on your own numbers
Full detail: Mistral Medium 3.5 pricing · o4-mini pricing