DeepSeek V4 Flash vs Mistral Large 3
DeepSeek against Mistral AI, costed on the same three workloads. DeepSeek V4 Flash is cheaper on all three workloads.
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Monthly bill, side by side
| Workload | DeepSeek V4 Flash | Mistral Large 3 | Difference |
|---|---|---|---|
| Support chatbot 2,500 six-turn conversations a day |
$1,087 | $1,609 | $522 (+48%) |
| Document summarizer 1,000 single-shot summaries a day |
$139 | $219 | $80.40 (1.6×) |
| Coding agent 200 twelve-turn sessions a day |
$788 | $1,224 | $436 (1.6×) |
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
| DeepSeek V4 Flash | Mistral Large 3 | |
|---|---|---|
| Input, per 1M tokens | $0.3 | $0.5 |
| Output, per 1M tokens | $1.2 | $1.5 |
| Cached input | $0.006 | $0.05 |
| Context window | 1M | 262K |
| Maximum output | 384K | 262K |
| Reasoning model | yes | no |
| Vision | no | yes |
Beyond the price
- DeepSeek V4 Flash reads up to 1M tokens of context in one request; Mistral Large 3 stops at 262K.
- DeepSeek V4 Flash can write up to 384K tokens in one response, against 262K for Mistral Large 3.
- Only DeepSeek V4 Flash is a reasoning model, so its output bill also pays for the thinking it does before it answers.
- Only Mistral Large 3 accepts images as input.
- Cached input costs 98% less than fresh input on DeepSeek V4 Flash and 90% less on Mistral Large 3, which matters most for workloads that resend the same prompt.
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Full detail: DeepSeek V4 Flash pricing · Mistral Large 3 pricing
More comparisons
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- Mistral Large 3 vs Nova 2 Lite
- Mistral Large 3 vs Claude Haiku 4.5
- Mistral Large 3 vs Qwen3 Next 80B
Common questions
Which is cheaper, DeepSeek V4 Flash or Mistral Large 3?
DeepSeek V4 Flash is cheaper on all three workloads.
How much would DeepSeek V4 Flash and Mistral Large 3 cost each month?
On PromptSpend's standard workloads, per month: support chatbot: DeepSeek V4 Flash $1,087, Mistral Large 3 $1,609 (DeepSeek V4 Flash is cheaper by $522); document summarizer: DeepSeek V4 Flash $139, Mistral Large 3 $219 (DeepSeek V4 Flash is cheaper by $80.40); coding agent: DeepSeek V4 Flash $788, Mistral Large 3 $1,224 (DeepSeek V4 Flash is cheaper by $436). No prompt caching and no batch discount is assumed.
How do DeepSeek V4 Flash and Mistral Large 3 differ apart from price?
DeepSeek V4 Flash reads up to 1M tokens of context in one request; Mistral Large 3 stops at 262K. DeepSeek V4 Flash can write up to 384K tokens in one response, against 262K for Mistral Large 3. Only DeepSeek V4 Flash is a reasoning model, so its output bill also pays for the thinking it does before it answers. Only Mistral Large 3 accepts images as input. Cached input costs 98% less than fresh input on DeepSeek V4 Flash and 90% less on Mistral Large 3, which matters most for workloads that resend the same prompt.