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Mistral Medium 3.5 vs Muse Spark Open

Muse Spark Open leads the LLM Stats Score 44.9 to 26.6. Muse Spark Open is 1.5x cheaper per token.

Mistral AI · Meta · Updated for 2026

Which is better?

Muse Spark Open leads the overall LLM Stats Score 44.9 to 26.6, ranking #43 overall.

On price, Muse Spark Open is roughly 1.5x cheaper per token on a blended 3:1 input/output basis, which adds up quickly at production volume.

Muse Spark Open also accepts a larger context window (1,048,576 input tokens), making it the stronger choice for long documents and large codebases.

Based on current LLM Stats indexes, shared benchmarks, pricing, and model metadata for 2026.

Choose Mistral Medium 3.5

  • you want predictable pricing at $1.50/M input and $7.50/M output

Choose Muse Spark Open

  • overall performance matters — it scores 44.9 and ranks #43 on LLM Stats
  • your work emphasizes reasoning and agents — it leads those capability indexes
  • cost matters — it's about 1.5x cheaper per token
  • you process long inputs — it offers a 1,048,576 token context window
  • you want the most recent training data — it shipped Oct 2026

At a glance

The differences that matter most.

Mistral Medium 3.5
Mistral AI
Muse Spark Open
Meta
Core performance indexes
LLM Stats Score
26.6
#169
44.9
#43
Reasoning
27.1
#160
45.2
#39
Coding
23.8
#91
33.0
#42
Agents
8.6
#151
30.6
#43
Cost, coverage & limits
Benchmark wins
—
—
Input price
$1.50 / M
$1.25 / M
Output price
$7.50 / M
$4.25 / M
Context window
256,000
1,048,576

Capability indexes

Additional strengths measured across groups of related public benchmarks

1 shared
Index
Mistral Medium 3.5
Muse Spark Open
Math
18.9#184
31.6#69
Conservative TrueSkill rating · higher is betterHow scores work

Individual benchmarks

11 reported for Mistral Medium 3.5 · 17 for Muse Spark Open

No common benchmarks found

Mistral Medium 3.5 and Muse Spark Opendon't have any common benchmark datasets to compare. They may have been evaluated on different testing suites.

Human preference

Blind head-to-head votes and playground preference scores

Pricing Analysis

Price comparison per million tokens

Muse Spark Open costs less

For input processing, Mistral Medium 3.5 ($1.50/1M tokens) is 1.2x more expensive than Muse Spark Open ($1.25/1M tokens).

For output processing, Mistral Medium 3.5 ($7.50/1M tokens) is 1.8x more expensive than Muse Spark Open ($4.25/1M tokens).

In conclusion, Mistral Medium 3.5 is more expensive than Muse Spark Open.*

* Using a 3:1 ratio of input to output tokens

Lowest available price from all providers
Tue Oct 20 2026 • llm-stats.com
Mistral AI
Mistral Medium 3.5
Input tokens$1.50
Output tokens$7.50
Best providerMistral
Meta
Muse Spark Open
Input tokens$1.25
Output tokens$4.25
Best providerTogether
Notice missing or incorrect data?

Model Size

Parameter count comparison

688.0B diff

Muse Spark Open has 688.0B more parameters than Mistral Medium 3.5, making it 537.5% larger.

Mistral AI
Mistral Medium 3.5
128.0Bparameters
Meta
Muse Spark Open
816.0Bparameters
128.0B
Mistral Medium 3.5
816.0B
Muse Spark Open

Context Window

Maximum input and output token capacity

Muse Spark Open accepts 1,048,576 input tokens compared to Mistral Medium 3.5's 256,000 tokens. Muse Spark Open can generate longer responses up to 1,048,576 tokens, while Mistral Medium 3.5 is limited to 256,000 tokens.

Mistral AI
Mistral Medium 3.5
Input256,000 tokens
Output256,000 tokens
Meta
Muse Spark Open
Input1,048,576 tokens
Output1,048,576 tokens
Tue Oct 20 2026 • llm-stats.com

Input capabilities

Documented input modalities across available providers

Both Mistral Medium 3.5 and Muse Spark Open support multimodal inputs.

They are both capable of processing various types of data, offering versatility in application.

Mistral Medium 3.5

Text
Images
Audio
Video

Muse Spark Open

Text
Images
Audio
Video

License

Usage and distribution terms

Mistral Medium 3.5 is licensed under Modified MIT License, while Muse Spark Open uses Muse Model License.

License differences may affect how you can use these models in commercial or open-source projects.

Mistral Medium 3.5

Modified MIT License

Open weights

Muse Spark Open

Muse Model License

Open weights

Release Timeline

When each model was launched

Mistral Medium 3.5 was released on 2026-04-29, while Muse Spark Open was released on 2026-10-15.

Muse Spark Open is 6 months newer than Mistral Medium 3.5.

Mistral Medium 3.5

Apr 29, 2026

5 months ago

Muse Spark Open

Oct 15, 2026

2 days ago

5mo newer

Knowledge Cutoff

When training data ends

Neither model specifies a knowledge cutoff date.

Unable to compare the recency of their training data.

No cutoff dates available

Provider Availability

Mistral Medium 3.5 is available from Mistral AI. Muse Spark Open is available from Together.

Mistral Medium 3.5

mistral logo
Mistral
Input Price:Input: $1.50/1MOutput Price:Output: $7.50/1M

Muse Spark Open

together logo
Together
Input Price:Input: $1.25/1MOutput Price:Output: $4.25/1M
* Prices shown are per million tokens

Outputs Comparison

Notice missing or incorrect data?

Judge for yourself.

Run your own prompts against Mistral Medium 3.5 and Muse Spark Open side-by-side, then vote on the output you prefer.

Mistral Medium 3.5
✓ Preferred
Muse Spark Open
Open in Playground

FAQ

Common questions about Mistral Medium 3.5 vs Muse Spark Open.

Which is better, Mistral Medium 3.5 or Muse Spark Open?

Muse Spark Open leads the LLM Stats Score 44.9 to 26.6. Mistral Medium 3.5 is made by Mistral AI and Muse Spark Open is made by Meta. The best choice depends on your use case — compare their capability indexes, individual benchmarks, pricing, and limits above.

How does Mistral Medium 3.5 compare to Muse Spark Open in benchmarks?

Mistral Medium 3.5 scores COLLIE: 95.8%, Tau3 Telecom: 91.4%, AIME 2025: 86.3%, SWE-Bench Verified: 77.6%, Tau3 Retail: 76.1%. Muse Spark Open scores MCP Atlas: 89.2%, GPQA: 89.0%, OSWorld-Verified: 80.4%, BabyVision: 80.2%, Terminal-Bench 2.1: 76.4%.

Is Mistral Medium 3.5 cheaper than Muse Spark Open?

Muse Spark Open is 1.2x cheaper for input tokens. Mistral Medium 3.5 costs $1.50/M input and $7.50/M output via mistral. Muse Spark Open costs $1.25/M input and $4.25/M output via together.

What are the context window sizes for Mistral Medium 3.5 and Muse Spark Open?

Mistral Medium 3.5 supports 256K tokens and Muse Spark Open supports 1.0M tokens. A larger context window lets you process longer documents, conversations, or codebases in a single request.

What are the main differences between Mistral Medium 3.5 and Muse Spark Open?

Key differences include LLM Stats Score (26.6 vs 44.9), context window (256K vs 1.0M), input pricing ($1.50 vs $1.25/M), licensing (Modified MIT License vs Muse Model License). See the full comparison above for benchmark-by-benchmark results.

Who makes Mistral Medium 3.5 and Muse Spark Open?

Mistral Medium 3.5 is developed by Mistral AI and Muse Spark Open is developed by Meta.

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