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Grok 4.5 vs Muse Glimmer-30B

Grok 4.5 leads the LLM Stats Score 47.0 to 35.5.

xAI · Meta · Updated for 2026

Which is better?

Grok 4.5 leads the overall LLM Stats Score 47.0 to 35.5, ranking #19 overall.

In the 4 individual benchmarks reported for both models, Grok 4.5 wins 4; this is a narrower head-to-head signal than the composite indexes.

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

Choose Grok 4.5

  • overall performance matters — it scores 47.0 and ranks #19 on LLM Stats
  • your work emphasizes reasoning and coding — it leads those capability indexes
  • you value its reported benchmark strengths — it wins 4 of 4 exact shared results

Choose Muse Glimmer-30B

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

At a glance

The differences that matter most.

Grok 4.5
xAI
Muse Glimmer-30B
Meta
Core performance indexes
LLM Stats Score
47.0
#19
35.5
#76
Reasoning
45.5
#26
34.7
#77
Coding
38.7
#16
23.8
#65
Agents
33.6
#20
18.5
#62
Cost, coverage & limits
Benchmark wins
4 of 4
0 of 4
Input price
$2.00 / M
— / M
Output price
$6.00 / M
— / M
Context window
500,000
—

Capability indexes

Additional strengths measured across groups of related public benchmarks

1 shared
Index
Grok 4.5
Muse Glimmer-30B
Tool use
24.5#31
18.6#59
Conservative TrueSkill rating · higher is betterHow scores work

Individual benchmarks

14 reported for Grok 4.5 · 25 for Muse Glimmer-30B

4 shared

Grok 4.5 outperforms in 4 benchmarks (GPQA, SWE-Bench Pro, Tau3 Banking, Terminal-Bench 2.1), while Muse Glimmer-30B is better at 0 benchmarks.

Grok 4.5 significantly outperforms across most benchmarks.

Fri Aug 28 2026 • llm-stats.com

Human preference

Blind head-to-head votes and playground preference scores

Context Window

Maximum input and output token capacity

Only Grok 4.5 specifies input context (500,000 tokens).

xAI
Grok 4.5
Input500,000 tokens
Output- tokens
Meta
Muse Glimmer-30B
Input- tokens
Output- tokens
Fri Aug 28 2026 • llm-stats.com

Input capabilities

Documented input modalities across available providers

Both Grok 4.5 and Muse Glimmer-30B support multimodal inputs.

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

Grok 4.5

Text
Images
Audio
Video

Muse Glimmer-30B

Text
Images
Audio
Video

License

Usage and distribution terms

Grok 4.5 is licensed under a proprietary license, while Muse Glimmer-30B uses Apache 2.0.

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

Grok 4.5

Proprietary

Closed source

Muse Glimmer-30B

Apache 2.0

Open weights

Release Timeline

When each model was launched

Grok 4.5 was released on 2026-07-16, while Muse Glimmer-30B was released on 2026-08-10.

Muse Glimmer-30B is 1 month newer than Grok 4.5.

Grok 4.5

Jul 16, 2026

1 months ago

Muse Glimmer-30B

Aug 10, 2026

2 weeks ago

3w newer

Knowledge Cutoff

When training data ends

Grok 4.5 has a knowledge cutoff of 2026-02-01, while Muse Glimmer-30B has a cutoff of 2026-01-04.

Grok 4.5 has more recent training data (up to 2026-02-01), making it potentially better informed about events through that date compared to Muse Glimmer-30B (2026-01-04).

Grok 4.5

Feb 2026

1 mo newer
Muse Glimmer-30B

Jan 2026

Outputs Comparison

Notice missing or incorrect data?Start an Issue discussion→

Judge for yourself.

Run your own prompts against Grok 4.5 and Muse Glimmer-30B side-by-side, then vote on the output you prefer.

Grok 4.5
✓ Preferred
Muse Glimmer-30B
Open in Playground

FAQ

Common questions about Grok 4.5 vs Muse Glimmer-30B.

Which is better, Grok 4.5 or Muse Glimmer-30B?

Grok 4.5 leads the LLM Stats Score 47.0 to 35.5. Grok 4.5 is made by xAI and Muse Glimmer-30B is made by Meta. The best choice depends on your use case — compare their capability indexes, individual benchmarks, pricing, and limits above.

How does Grok 4.5 compare to Muse Glimmer-30B in benchmarks?

Grok 4.5 scores GPQA: 93.0%, Terminal-Bench 2.1: 83.3%, SWE-Bench Pro: 64.7%, AA-Omniscience Index: 63.0%, DeepSWE 1.0: 62.0%. Muse Glimmer-30B scores AIME 2026: 94.7%, Siren AgentDojo Utility: 94.2%, GPQA: 83.5%, AA-LCR: 80.0%, CharXiv-R: 78.8%.

What are the context window sizes for Grok 4.5 and Muse Glimmer-30B?

Grok 4.5 supports 500K tokens and Muse Glimmer-30B supports an unknown number of tokens. A larger context window lets you process longer documents, conversations, or codebases in a single request.

What are the main differences between Grok 4.5 and Muse Glimmer-30B?

Key differences include LLM Stats Score (47.0 vs 35.5), licensing (Proprietary vs Apache 2.0). See the full comparison above for benchmark-by-benchmark results.

Who makes Grok 4.5 and Muse Glimmer-30B?

Grok 4.5 is developed by xAI and Muse Glimmer-30B is developed by Meta.

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