DeepSeek V4.1 Flash vs Mistral Medium 3.5
API pricing, context window and capabilities for DeepSeek V4.1 Flash and Mistral Medium 3.5, side by side. Prices are the cheapest listed serving route per 1M tokens, from LiteLLM and OpenRouter.
Verdict
computed from the published numbersDeepSeek V4.1 Flash wins on price, on intelligence and on context window. Benchmark data is unavailable for one or both models.
Price
DeepSeek V4.1 Flash
Terminal-Bench
Not called
Intelligence
DeepSeek V4.1 Flash
Context window
DeepSeek V4.1 Flash
Key takeaways
who wins on what, from the published numbersDeepSeek V4.1 Flash wins
- Cheaper input ($0.01 vs $1.50 /1M)
- Cheaper output ($0.60 vs $7.50 /1M)
- Larger context window (1M vs 262K)
- Higher max output (1M vs 262K)
- More serving providers (12 vs 4)
- Supports prompt caching
Mistral Medium 3.5 wins
No clear edge on the tracked metrics.
Cheaper overall
DeepSeek V4.1 Flash
$0.01 + $0.60 /1M
Larger context
DeepSeek V4.1 Flash
1M
More providers
DeepSeek V4.1 Flash
12 providers
Pricing & specs
cheapest listed route · per 1M tokensOn-demand listed rates, OpenRouter routed quotes and Vercel reseller quotes. Enterprise commitments can be materially lower.
| DeepSeek V4.1 Flash | Mistral Medium 3.5 | |
|---|---|---|
| Input $/1M | $0.01via Coralbricks best | $1.50via Mistral |
| Output $/1M | $0.60via Sail best | $7.50via Mistral |
| Context window | 1M best | 262K |
| Max output | 1M best | 262K |
| Serving providers | 12 best | 4 |
| Date | Released Sep 10, 2026 | Released Apr 30, 2026 |
Benchmarks
Benchmark scores, side by side| DeepSeek V4.1 Flash | Mistral Medium 3.5 | |
|---|---|---|
| Intelligence | 39.5 best | 14.2 |
| Terminal-Bench | Not available | 51% |
| GPQA Diamond | Not available | 75% |
| Output speed | 187 t/s best | 167 t/s |
| Latency (TTFT) | 0.96s best | 2.21s |
Cost calculator
choose a serving route for each sideInput tokens / month
Output tokens / month
DeepSeek V4.1 Flash
via Coralbricks
$1.25
Mistral Medium 3.5
via OpenRouter
$15
Capabilities
feature support, side by side| Feature | DeepSeek V4.1 Flash | Mistral Medium 3.5 |
|---|---|---|
| Vision | ✓ | ✓ |
| Tool use | ✓ | ✓ |
| Reasoning | ✓ | ✓ |
| Audio | — | — |
| Prompt caching | ✓ | — |
| Structured output | ✓ | ✓ |
| Web search | — | — |
Related comparisons
Frequently asked questions
Which is cheaper, DeepSeek V4.1 Flash or Mistral Medium 3.5?
DeepSeek V4.1 Flash is cheaper for input ($0.01 vs $1.50 per 1M tokens) from Coralbricks. DeepSeek V4.1 Flash is cheaper for output ($0.60 vs $7.50 per 1M tokens) from Sail.
What is the context window difference between DeepSeek V4.1 Flash and Mistral Medium 3.5?
DeepSeek V4.1 Flash has a 1M-token context window and Mistral Medium 3.5 has 262K tokens, so DeepSeek V4.1 Flash can take a larger prompt.
How do DeepSeek V4.1 Flash and Mistral Medium 3.5 compare on benchmarks?
On the tracked benchmarks, DeepSeek V4.1 Flash leads on intelligence.
Listed prices from LiteLLM, OpenRouter and Vercel · last checked Oct 14, 2026
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