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GLM-5.3-Flash vs Muse Spark Open

GLM-5.3-Flash and Muse Spark Open are closely matched at 48.6 and 44.9 on the LLM Stats Score. GLM-5.3-Flash is 8.4x cheaper per token.

Zhipu AI · Meta · Updated for 2026

Which is better?

GLM-5.3-Flash and Muse Spark Open are closely matched on the overall LLM Stats Score at 48.6 and 44.9.

In the 5 individual benchmarks reported for both models, GLM-5.3-Flash wins 4; this is a narrower head-to-head signal than the composite indexes.

On price, GLM-5.3-Flash is roughly 8.4x 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 GLM-5.3-Flash

  • you value its reported benchmark strengths — it wins 4 of 5 exact shared results
  • cost matters — it's about 8.4x cheaper per token

Choose Muse Spark Open

  • you want the most recent training data — it shipped Oct 2026

At a glance

The differences that matter most.

GLM-5.3-Flash
Zhipu AI
Muse Spark Open
Meta
Core performance indexes
LLM Stats Score
48.6
#28
44.9
#43
Reasoning
47.8
#22
45.2
#39
Coding
31.3
#55
33.0
#42
Agents
34.7
#27
30.6
#43
Cost, coverage & limits
Benchmark wins
4 of 5
1 of 5
Input price
$0.15 / M
$1.25 / M
Output price
$0.50 / 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
GLM-5.3-Flash
Muse Spark Open
Vision
30.9#35
31.2#34
Tool use
29.0#18
23.3#44
Multimodal
30.3#37
33.1#20
Conservative TrueSkill rating · higher is betterHow scores work

Individual benchmarks

15 reported for GLM-5.3-Flash · 17 for Muse Spark Open

5 shared

GLM-5.3-Flash outperforms in 4 benchmarks (Artificial Analysis, DeepSWE 1.1, GDPval-AA, Terminal-Bench 2.1), while Muse Spark Open is better at 1 benchmark (BabyVision).

GLM-5.3-Flash significantly outperforms across most benchmarks.

Wed Oct 21 2026 • llm-stats.com

Human preference

Blind head-to-head votes and playground preference scores

Pricing Analysis

Price comparison per million tokens

GLM-5.3-Flash costs less

For input processing, GLM-5.3-Flash ($0.15/1M tokens) is 8.3x cheaper than Muse Spark Open ($1.25/1M tokens).

For output processing, GLM-5.3-Flash ($0.50/1M tokens) is 8.5x cheaper than Muse Spark Open ($4.25/1M tokens).

In conclusion, Muse Spark Open is more expensive than GLM-5.3-Flash.*

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

Lowest available price from all providers
Wed Oct 21 2026 • llm-stats.com
Zhipu AI
GLM-5.3-Flash
Input tokens$0.15
Output tokens$0.50
Best providerDeepinfra
Meta
Muse Spark Open
Input tokens$1.25
Output tokens$4.25
Best providerTogether
Notice missing or incorrect data?

Model Size

Parameter count comparison

496.0B diff

Muse Spark Open has 496.0B more parameters than GLM-5.3-Flash, making it 155.0% larger.

Zhipu AI
GLM-5.3-Flash
320.0Bparameters
Meta
Muse Spark Open
816.0Bparameters
320.0B
GLM-5.3-Flash
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. Both models can generate responses up to 1,048,576 tokens.

Zhipu AI
GLM-5.3-Flash
Input1,048,576 tokens
Output1,048,576 tokens
Meta
Muse Spark Open
Input1,048,576 tokens
Output1,048,576 tokens
Wed Oct 21 2026 • llm-stats.com

Input capabilities

Documented input modalities across available providers

Both GLM-5.3-Flash and Muse Spark Open support multimodal inputs.

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

GLM-5.3-Flash

Text
Images
Audio
Video

Muse Spark Open

Text
Images
Audio
Video

License

Usage and distribution terms

GLM-5.3-Flash is licensed under MIT, while Muse Spark Open uses Muse Model License.

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

GLM-5.3-Flash

MIT

Open weights

Muse Spark Open

Muse Model License

Open weights

Release Timeline

When each model was launched

GLM-5.3-Flash was released on 2026-08-26, while Muse Spark Open was released on 2026-10-15.

Muse Spark Open is 2 months newer than GLM-5.3-Flash.

GLM-5.3-Flash

Aug 26, 2026

1 months ago

Muse Spark Open

Oct 15, 2026

4 days ago

1mo 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

GLM-5.3-Flash is available from DeepInfra, FriendliAI, Novita, ZAI. Muse Spark Open is available from Together.

GLM-5.3-Flash

deepinfra logo
Deepinfra
Input Price:Input: $0.15/1MOutput Price:Output: $0.50/1M
friendli logo
FriendliAI
Input Price:Input: $0.15/1MOutput Price:Output: $0.50/1M
novita logo
Novita
Input Price:Input: $0.15/1MOutput Price:Output: $0.50/1M
z logo
Unknown Organization
Input Price:Input: $0.15/1MOutput Price:Output: $0.50/1M

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 GLM-5.3-Flash and Muse Spark Open side-by-side, then vote on the output you prefer.

GLM-5.3-Flash
✓ Preferred
Muse Spark Open
Open in Playground

FAQ

Common questions about GLM-5.3-Flash vs Muse Spark Open.

Which is better, GLM-5.3-Flash or Muse Spark Open?

GLM-5.3-Flash and Muse Spark Open are closely matched on the LLM Stats Score at 48.6 and 44.9. GLM-5.3-Flash is made by Zhipu 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 GLM-5.3-Flash compare to Muse Spark Open in benchmarks?

GLM-5.3-Flash scores CharXiv-R: 89.4%, Terminal-Bench 2.1: 84.3%, MMVU: 80.5%, Toolathlon: 78.4%, Chartography: 78.0%. 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 GLM-5.3-Flash cheaper than Muse Spark Open?

GLM-5.3-Flash is 8.3x cheaper for input tokens. GLM-5.3-Flash costs $0.15/M input and $0.50/M output via deepinfra. Muse Spark Open costs $1.25/M input and $4.25/M output via together.

What are the context window sizes for GLM-5.3-Flash and Muse Spark Open?

GLM-5.3-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 GLM-5.3-Flash and Muse Spark Open?

Key differences include LLM Stats Score (48.6 vs 44.9), input pricing ($0.15 vs $1.25/M), licensing (MIT vs Muse Model License). See the full comparison above for benchmark-by-benchmark results.

Who makes GLM-5.3-Flash and Muse Spark Open?

GLM-5.3-Flash is developed by Zhipu AI and Muse Spark Open is developed by Meta.

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