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Laguna S 2.1 vs Muse Spark Open

Laguna S 2.1 and Muse Spark Open are closely matched at 39.7 and 45.3 on the LLM Stats Score. Laguna S 2.1 is 16.0x cheaper per token.

Poolside · Meta · Updated for 2026

Which is better?

Laguna S 2.1 and Muse Spark Open are closely matched on the overall LLM Stats Score at 39.7 and 45.3.

In the 3 individual benchmarks reported for both models, Muse Spark Open wins 3; this is a narrower head-to-head signal than the composite indexes.

On price, Laguna S 2.1 is roughly 16.0x cheaper per token on a blended 3:1 input/output basis, which adds up quickly at production volume.

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

Choose Laguna S 2.1

  • cost matters — it's about 16.0x cheaper per token

Choose Muse Spark Open

  • you value its reported benchmark strengths — it wins 3 of 3 exact shared results
  • you want the most recent training data — it shipped Oct 2026

At a glance

The differences that matter most.

Laguna S 2.1
Poolside
Muse Spark Open
Meta
Core performance indexes
LLM Stats Score
39.7
#73
45.3
#42
Reasoning
39.7
#71
45.7
#35
Coding
29.1
#69
33.5
#40
Agents
23.3
#75
30.8
#43
Cost, coverage & limits
Benchmark wins
0 of 3
3 of 3
Input price
$0.10 / M
$1.25 / M
Output price
$0.20 / M
$4.25 / M
Context window
1,048,576
1,048,576

Capability indexes

Additional strengths measured across groups of related public benchmarks

1 shared
Index
Laguna S 2.1
Muse Spark Open
Tool use
15.3#107
23.3#45
Conservative TrueSkill rating · higher is betterHow scores work

Individual benchmarks

6 reported for Laguna S 2.1 · 17 for Muse Spark Open

3 shared

Laguna S 2.1 outperforms in 0 benchmarks, while Muse Spark Open is better at 3 benchmarks (DeepSWE 1.1, SWE Atlas - Codebase QnA, Terminal-Bench 2.1).

Muse Spark Open significantly outperforms across most benchmarks.

Thu Oct 22 2026 • llm-stats.com

Human preference

Blind head-to-head votes and playground preference scores

Pricing Analysis

Price comparison per million tokens

Laguna S 2.1 costs less

For input processing, Laguna S 2.1 ($0.10/1M tokens) is 12.5x cheaper than Muse Spark Open ($1.25/1M tokens).

For output processing, Laguna S 2.1 ($0.20/1M tokens) is 21.3x cheaper than Muse Spark Open ($4.25/1M tokens).

In conclusion, Muse Spark Open is more expensive than Laguna S 2.1.*

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

Lowest available price from all providers
Thu Oct 22 2026 • llm-stats.com
Poolside
Laguna S 2.1
Input tokens$0.10
Output tokens$0.20
Best providerPoolside
Meta
Muse Spark Open
Input tokens$1.25
Output tokens$4.25
Best providerTogether
Notice missing or incorrect data?

Model Size

Parameter count comparison

698.0B diff

Muse Spark Open has 698.0B more parameters than Laguna S 2.1, making it 591.5% larger.

Poolside
Laguna S 2.1
118.0Bparameters
Meta
Muse Spark Open
816.0Bparameters
118.0B
Laguna S 2.1
816.0B
Muse Spark Open

Context Window

Maximum input and output token capacity

Both models have the same input context window of 1,048,576 tokens. Only Muse Spark Open specifies output context (1,048,576 tokens).

Poolside
Laguna S 2.1
Input1,048,576 tokens
Output- tokens
Meta
Muse Spark Open
Input1,048,576 tokens
Output1,048,576 tokens
Thu Oct 22 2026 • llm-stats.com

Input capabilities

Documented input modalities across available providers

Muse Spark Open supports multimodal inputs, whereas Laguna S 2.1 does not.

Muse Spark Open can handle both text and other forms of data like images, making it suitable for multimodal applications.

Laguna S 2.1

Text
Images
Audio
Video

Muse Spark Open

Text
Images
Audio
Video

License

Usage and distribution terms

Laguna S 2.1 is licensed under OpenMDW License v1.1, while Muse Spark Open uses Muse Model License.

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

Laguna S 2.1

OpenMDW License v1.1

Open weights

Muse Spark Open

Muse Model License

Open weights

Release Timeline

When each model was launched

Laguna S 2.1 was released on 2026-07-21, while Muse Spark Open was released on 2026-10-15.

Muse Spark Open is 3 months newer than Laguna S 2.1.

Laguna S 2.1

Jul 21, 2026

3 months ago

Muse Spark Open

Oct 15, 2026

4 days ago

2mo 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

Laguna S 2.1 is available from Poolside. Muse Spark Open is available from Together.

Laguna S 2.1

poolside logo
Poolside
Input Price:Input: $0.10/1MOutput Price:Output: $0.20/1M

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 Laguna S 2.1 and Muse Spark Open side-by-side, then vote on the output you prefer.

Laguna S 2.1
✓ Preferred
Muse Spark Open
Open in Playground

FAQ

Common questions about Laguna S 2.1 vs Muse Spark Open.

Which is better, Laguna S 2.1 or Muse Spark Open?

Laguna S 2.1 and Muse Spark Open are closely matched on the LLM Stats Score at 39.7 and 45.3. Laguna S 2.1 is made by Poolside 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 Laguna S 2.1 compare to Muse Spark Open in benchmarks?

Laguna S 2.1 scores SWE-bench Multilingual: 78.5%, Terminal-Bench 2.1: 70.2%, SWE-Bench Pro: 59.4%, Toolathlon: 49.7%, SWE Atlas - Codebase QnA: 46.2%. 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 Laguna S 2.1 cheaper than Muse Spark Open?

Laguna S 2.1 is 12.5x cheaper for input tokens. Laguna S 2.1 costs $0.10/M input and $0.20/M output via poolside. Muse Spark Open costs $1.25/M input and $4.25/M output via together.

What are the context window sizes for Laguna S 2.1 and Muse Spark Open?

Laguna S 2.1 supports 1.0M 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 Laguna S 2.1 and Muse Spark Open?

Key differences include LLM Stats Score (39.7 vs 45.3), input pricing ($0.10 vs $1.25/M), multimodal support (no vs yes), licensing (OpenMDW License v1.1 vs Muse Model License). See the full comparison above for benchmark-by-benchmark results.

Who makes Laguna S 2.1 and Muse Spark Open?

Laguna S 2.1 is developed by Poolside and Muse Spark Open is developed by Meta.

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