Mistral Large 3 vs o4-mini
Mistral AI against OpenAI, costed on the same three workloads. Mistral Large 3 is cheaper on all three workloads.
o4-mini has been retired by its vendor. Its column shows the last rates it was sold at, kept for reference.
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Monthly bill, side by side
| Workload | Mistral Large 3 | o4-mini | Difference |
|---|---|---|---|
| Support chatbot 2,500 six-turn conversations a day |
$1,609 | $3,985 | $2,376 (2.5×) |
| Document summarizer 1,000 single-shot summaries a day |
$219 | $508 | $289 (2.3×) |
| Coding agent 200 twelve-turn sessions a day |
$1,224 | $2,891 | $1,667 (2.4×) |
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 Large 3 | o4-mini | |
|---|---|---|
| Input, per 1M tokens | $0.5 | $1.1 |
| Output, per 1M tokens | $1.5 | $4.4 |
| Cached input | $0.05 | $0.275 |
| Context window | 262K | 200K |
| Maximum output | 262K | 100K |
| Reasoning model | no | yes |
| Vision | yes | yes |
Beyond the price
- Mistral Large 3 reads up to 262K tokens of context in one request; o4-mini stops at 200K.
- Mistral Large 3 can write up to 262K tokens in one response, against 100K for o4-mini.
- Only o4-mini is a reasoning model, so its output bill also pays for the thinking it does before it answers.
- Cached input costs 90% less than fresh input on Mistral Large 3 and 75% less on o4-mini, which matters most for workloads that resend the same prompt.
Run this comparison on your own numbers
Full detail: Mistral Large 3 pricing · o4-mini pricing
More comparisons
Other head-to-heads that include Mistral Large 3 or o4-mini.
- Mistral Large 3 vs Nova 2 Lite
- Mistral Large 3 vs Claude Haiku 4.5
- Mistral Large 3 vs Qwen3 Next 80B
- o4-mini vs Nova 2 Lite
- o4-mini vs Nova 2 Pro
- o4-mini vs Claude Haiku 4.5
Common questions
Which is cheaper, Mistral Large 3 or o4-mini?
Mistral Large 3 is cheaper on all three workloads.
How much would Mistral Large 3 and o4-mini cost each month?
On PromptSpend's standard workloads, per month: support chatbot: Mistral Large 3 $1,609, o4-mini $3,985 (Mistral Large 3 is cheaper by $2,376); document summarizer: Mistral Large 3 $219, o4-mini $508 (Mistral Large 3 is cheaper by $289); coding agent: Mistral Large 3 $1,224, o4-mini $2,891 (Mistral Large 3 is cheaper by $1,667). No prompt caching and no batch discount is assumed.
How do Mistral Large 3 and o4-mini differ apart from price?
Mistral Large 3 reads up to 262K tokens of context in one request; o4-mini stops at 200K. Mistral Large 3 can write up to 262K tokens in one response, against 100K for o4-mini. Only o4-mini is a reasoning model, so its output bill also pays for the thinking it does before it answers. Cached input costs 90% less than fresh input on Mistral Large 3 and 75% less on o4-mini, which matters most for workloads that resend the same prompt.