The AI arena is free today

Open Superagent

Gemini 3.8 Flash vs Muse Spark Open

Gemini 3.8 Flash and Muse Spark Open are closely matched at 48.8 and 44.9 on the LLM Stats Score. Gemini 3.8 Flash is 1.3x cheaper per token.

Google · Meta · Updated for 2026

Which is better?

Gemini 3.8 Flash and Muse Spark Open are closely matched on the overall LLM Stats Score at 48.8 and 44.9.

In the 3 individual benchmarks reported for both models, Gemini 3.8 Flash wins 3; this is a narrower head-to-head signal than the composite indexes.

On price, Gemini 3.8 Flash is roughly 1.3x 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 Gemini 3.8 Flash

  • you value its reported benchmark strengths — it wins 3 of 3 exact shared results
  • cost matters — it's about 1.3x cheaper per token

Choose Muse Spark Open

  • you want the most recent training data — it shipped Oct 2026
  • you need open weights you can self-host or fine-tune

At a glance

The differences that matter most.

Gemini 3.8 Flash
Google
Muse Spark Open
Meta
Core performance indexes
LLM Stats Score
48.8
#26
44.9
#43
Reasoning
46.4
#30
45.2
#39
Coding
34.0
#36
33.0
#42
Agents
33.8
#31
30.6
#43
Cost, coverage & limits
Benchmark wins
3 of 3
0 of 3
Input price
$0.75 / M
$1.25 / M
Output price
$3.75 / M
$4.25 / M
Context window
1,048,576
1,048,576

Capability indexes

Additional strengths measured across groups of related public benchmarks

3 shared
Index
Gemini 3.8 Flash
Muse Spark Open
Vision
33.2#21
31.2#34
Tool use
22.9#50
23.3#44
Multimodal
34.2#17
33.1#20
Conservative TrueSkill rating · higher is betterHow scores work

Individual benchmarks

13 reported for Gemini 3.8 Flash · 17 for Muse Spark Open

3 shared

Gemini 3.8 Flash outperforms in 3 benchmarks (DeepSWE 1.1, GDPval-AA, Terminal-Bench 2.1), while Muse Spark Open is better at 0 benchmarks.

Gemini 3.8 Flash significantly outperforms across most benchmarks.

Mon Oct 19 2026 • llm-stats.com

Human preference

Blind head-to-head votes and playground preference scores

Pricing Analysis

Price comparison per million tokens

Gemini 3.8 Flash costs less

For input processing, Gemini 3.8 Flash ($0.75/1M tokens) is 1.7x cheaper than Muse Spark Open ($1.25/1M tokens).

For output processing, Gemini 3.8 Flash ($3.75/1M tokens) is 1.1x cheaper than Muse Spark Open ($4.25/1M tokens).

In conclusion, Muse Spark Open is more expensive than Gemini 3.8 Flash.*

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

Lowest available price from all providers
Mon Oct 19 2026 • llm-stats.com
Google
Gemini 3.8 Flash
Input tokens$0.75
Output tokens$3.75
Best providerGoogle
Meta
Muse Spark Open
Input tokens$1.25
Output tokens$4.25
Best providerTogether
Notice missing or incorrect data?

Context Window

Maximum input and output token capacity

Both models have the same input context window of 1,048,576 tokens. Muse Spark Open can generate longer responses up to 1,048,576 tokens, while Gemini 3.8 Flash is limited to 65,536 tokens.

Google
Gemini 3.8 Flash
Input1,048,576 tokens
Output65,536 tokens
Meta
Muse Spark Open
Input1,048,576 tokens
Output1,048,576 tokens
Mon Oct 19 2026 • llm-stats.com

Input capabilities

Documented input modalities across available providers

Both Gemini 3.8 Flash and Muse Spark Open support multimodal inputs.

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

Gemini 3.8 Flash

Text
Images
Audio
Video

Muse Spark Open

Text
Images
Audio
Video

License

Usage and distribution terms

Gemini 3.8 Flash is licensed under a proprietary 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.

Gemini 3.8 Flash

Proprietary

Closed source

Muse Spark Open

Muse Model License

Open weights

Release Timeline

When each model was launched

Gemini 3.8 Flash was released on 2026-09-02, while Muse Spark Open was released on 2026-10-15.

Muse Spark Open is 1 month newer than Gemini 3.8 Flash.

Gemini 3.8 Flash

Sep 2, 2026

1 months ago

Muse Spark Open

Oct 15, 2026

4 days ago

1mo newer

Knowledge Cutoff

When training data ends

Gemini 3.8 Flash has a documented knowledge cutoff of 2026-03-31, while Muse Spark Open's cutoff date is not specified.

We can confirm Gemini 3.8 Flash's training data extends to 2026-03-31, but cannot make a direct comparison without Muse Spark Open's cutoff date.

Gemini 3.8 Flash

Mar 2026

Muse Spark Open

—

Provider Availability

Gemini 3.8 Flash is available from Google. Muse Spark Open is available from Together.

Gemini 3.8 Flash

google logo
Google
Input Price:Input: $0.75/1MOutput Price:Output: $3.75/1M

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 Gemini 3.8 Flash and Muse Spark Open side-by-side, then vote on the output you prefer.

Gemini 3.8 Flash
✓ Preferred
Muse Spark Open
Open in Playground

FAQ

Common questions about Gemini 3.8 Flash vs Muse Spark Open.

Which is better, Gemini 3.8 Flash or Muse Spark Open?

Gemini 3.8 Flash and Muse Spark Open are closely matched on the LLM Stats Score at 48.8 and 44.9. Gemini 3.8 Flash is made by Google 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 Gemini 3.8 Flash compare to Muse Spark Open in benchmarks?

Gemini 3.8 Flash scores Terminal-Bench 2.1: 89.4%, LVBench: 87.1%, CharXiv-R: 86.2%, LABBench2: 86.2%, DeepSWE 1.1: 73.7%. 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 Gemini 3.8 Flash cheaper than Muse Spark Open?

Gemini 3.8 Flash is 1.7x cheaper for input tokens. Gemini 3.8 Flash costs $0.75/M input and $3.75/M output via google. Muse Spark Open costs $1.25/M input and $4.25/M output via together.

What are the context window sizes for Gemini 3.8 Flash and Muse Spark Open?

Gemini 3.8 Flash 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 Gemini 3.8 Flash and Muse Spark Open?

Key differences include LLM Stats Score (48.8 vs 44.9), input pricing ($0.75 vs $1.25/M), licensing (Proprietary vs Muse Model License). See the full comparison above for benchmark-by-benchmark results.

Who makes Gemini 3.8 Flash and Muse Spark Open?

Gemini 3.8 Flash is developed by Google and Muse Spark Open is developed by Meta.

Related comparisons