AI model comparison
Hermes 4 405B vs Mistral Medium 3.1
Pricing, context window, benchmarks, and features compared side by side. Or skip the guesswork and send one prompt to both.
Nous
Hermes 4 405B
Hermes 4 is a large-scale reasoning model built on Meta-Llama-3.1-405B and released by Nous Research.
- Input / 1M
- $1
- Output / 1M
- $3
- Context
- 131K
Mistral
Mistral Medium 3.1
Mistral Medium 3.1 is an updated version of Mistral Medium 3, which is a high-performance enterprise-grade language model designed to deliver frontier-level capabilities at significantly reduced operational cost.
- Input / 1M
- $0.40
- Output / 1M
- $2
- Context
- 131K
At a glance
Quick verdict
How the two models stack up on the things people ask about most.
Lower price
Mistral Medium 3.1
1.9x cheaper for a typical chat
Higher intelligence score
Mistral Medium 3.1
9.2 vs 7.5 on Artificial Analysis
Larger context window
Tie
131K vs 131K tokens
Newer release
Hermes 4 405B
Released August 26, 2025
Benchmarks
Benchmark scores
Independent scores from Artificial Analysis. Higher is better.
Intelligence index
Hermes 4 405B7.5Mistral Medium 3.19.2Coding index
Hermes 4 405BNot availableMistral Medium 3.120.5Agentic index
Hermes 4 405BNot availableMistral Medium 3.11.9Pricing
Hermes 4 405B vs Mistral Medium 3.1 API pricing
Per-token API rates. Cheaper option highlighted.
| Metric | Hermes 4 405B | Mistral Medium 3.1 |
|---|---|---|
| Input tokensPer 1M tokens | $1 | $0.40 |
| Output tokensPer 1M tokens | $3 | $2 |
| Cached input (read)Per 1M tokens | Not available | $0.04 |
| Cache writePer 1M tokens | Not available | Not available |
What it costs in practice
Estimated cost per 1,000 requests at standard rates. Coding and long-document figures also show the cost when the input is already cached.
Chat message
2K in, 500 out
Hermes 4 405B$3.50Mistral Medium 3.1$1.80Coding task
30K in, 4K out
Hermes 4 405B$42Mistral Medium 3.1$20$9.20 cachedLong document summary
150K in, 2K out
Hermes 4 405B$156Mistral Medium 3.1$64$10 cachedSpecs
Context window and capabilities
How much each model can read, how much it can write, and what it accepts as input.
| Metric | Hermes 4 405B | Mistral Medium 3.1 |
|---|---|---|
| Context window | 131K tokens | 131K tokens |
| Max output | 118K tokens | 105K tokens |
| Input types | Text | File, Image, Text |
| Output types | Text | Text |
| Reasoning effort levels | Not available | Not available |
| Default reasoning effort | Not available | Not available |
| Release date | August 26, 2025 | August 13, 2025 |
Features
Supported features
API features available for each model.
| Metric | Hermes 4 405B | Mistral Medium 3.1 |
|---|---|---|
| Tool calling | Not supported | Supported |
| Structured outputs | Not supported | Supported |
| JSON mode | Supported | Supported |
| Reasoning | Supported | Not supported |
| Temperature | Supported | Supported |
| Stop sequences | Not supported | Supported |
| Deterministic seed | Not supported | Supported |
| Verbosity control | Not supported | Not supported |
Keep exploring
More on these models
Other head-to-heads, the full model page, and the alternatives list for each model.
Hermes 4 405BView full model details- Hermes 4 405B vs GPT-4.1 Mini
- Hermes 4 405B vs Qwen3 VL 235B A22B Instruct
- Hermes 4 405B vs Mistral Medium 3
- Hermes 4 405B vs Devstral 2 2512
- Hermes 4 405B vs GLM 4.5V
- Hermes 4 405B vs Mistral Large 2407
- Hermes 4 405B vs Hermes 3 405B Instruct
- Hermes 4 405B vs Nova Pro 1.0
- Hermes 4 405B vs Hermes 3 70B Instruct
- Hermes 4 405B vs Mistral Large
- Hermes 4 405B vs Mixtral 8x22B Instruct
Mistral Medium 3.1View full model details- Mistral Medium 3.1 vs GPT-4.1 Mini
- Mistral Medium 3.1 vs Mistral Small 4
- Mistral Medium 3.1 vs Qwen3 VL 235B A22B Instruct
- Mistral Medium 3.1 vs DeepSeek V3 0324
- Mistral Medium 3.1 vs Qwen3 Next 80B A3B Instruct
- Mistral Medium 3.1 vs Qwen3 Coder Next
- Mistral Medium 3.1 vs Mistral Large 3 2512
- Mistral Medium 3.1 vs Mistral Medium 3
- Mistral Medium 3.1 vs Devstral 2 2512
- Mistral Medium 3.1 vs GLM 4.5V
- Mistral Medium 3.1 vs Mistral Large 2407
- Mistral Medium 3.1 vs Nova Pro 1.0
- Mistral Medium 3.1 vs Mistral Large
- Mistral Medium 3.1 vs Mixtral 8x22B Instruct
Our take
Mistral Medium 3.1 is 1.9x cheaper for a typical chat. Mistral Medium 3.1 scores higher on the Artificial Analysis Intelligence Index (9.2 vs 7.5). The right pick depends on your workload, so the quickest way to settle it is to send the same prompt to both and compare.
FAQ
Frequently asked questions
Is Hermes 4 405B or Mistral Medium 3.1 cheaper?
Mistral Medium 3.1 is cheaper for a typical chat (2K input tokens and 500 output tokens). Mistral Medium 3.1 costs $0.40 per 1M input tokens and $2 per 1M output tokens, while Hermes 4 405B costs $1 per 1M input tokens and $3 per 1M output tokens.
Which has a bigger context window, Hermes 4 405B or Mistral Medium 3.1?
Hermes 4 405B supports up to 131K tokens of context, compared with 131K for Mistral Medium 3.1.
Is Hermes 4 405B smarter than Mistral Medium 3.1?
On the Artificial Analysis Intelligence Index, Hermes 4 405B scores 7.5 and Mistral Medium 3.1 scores 9.2, putting Mistral Medium 3.1 ahead. Benchmarks don't capture everything, so the best test is running your own prompts through both.
Can I use Hermes 4 405B and Mistral Medium 3.1 at the same time?
Yes. Shortcut Chat sends one prompt to multiple models at once, so you can see Hermes 4 405B and Mistral Medium 3.1 answer side by side and keep the better response.
Why choose? Ask both.
Send one prompt to Hermes 4 405B and Mistral Medium 3.1 at the same time. Compare the answers side by side and keep the best one.