Muse Spark 1.2vsGLM-4.5
Muse Spark 1.2 | GLM-4.5 | |
|---|---|---|
| Specifications | ||
Parameters | — | 355B |
Context window | 1M | 128k |
| Benchmarks | ||
Nonsense detection BullshitBench v2Given a confidently-worded but nonsensical prompt, does the AI spot that it makes no sense and push back — instead of playing along and inventing an answer? The score is how often it clearly called out the nonsense. Higher is better. | — | 8% |
Coding SWE-Bench VerifiedReal coding tasks pulled from open-source projects — the AI has to find and fix actual bugs. A human-checked version of the original SWE-Bench. Higher is better. | — | 64.2% |
Agentic coding DeepSWE 1.1Artificial Analysis' independent test of deep, agentic software-engineering work — the AI has to plan and carry out substantial coding tasks end to end. (Version 1.1 of the test.) Higher is better. | 59.3% | — |
Agentic terminal coding Terminal-Bench 2.1Can the AI work in a command-line terminal — running commands and finishing technical setup tasks the way a developer would? Higher is better. | 82.9% | — |
Science GPQA DiamondGraduate-level science questions in biology, physics, and chemistry — hard enough that subject-matter PhDs score around 65%. Higher is better. | — | 79.1% |
| Overview | ||
| Company | Meta | Z.ai |
| Release date | Aug 5 2026 | Jul 28 2025 |
| Access | Proprietary | Open Weight |
Which is better: Muse Spark 1.2 or GLM-4.5?
Muse Spark 1.2 and GLM-4.5 don't publish scores on any of the same benchmarks, so there's no direct head-to-head comparison. GLM-4.5 shipped 373 days before Muse Spark 1.2, so benchmark comparisons should account for the intervening progress.
Context windows are 1M (Muse Spark 1.2) vs 128k (GLM-4.5). Muse Spark 1.2 is proprietary, while GLM-4.5 is open weight.
Direct benchmark comparisons are unavailable — Muse Spark 1.2 and GLM-4.5 don't publish scores on any of the same benchmarks.
Frequently asked questions
Muse Spark 1.2 was released by Meta on Aug 5 2026.
GLM-4.5 was released by Z.ai on Jul 28 2025.
Muse Spark 1.2 has a 1M context window; GLM-4.5 has 128k.
Muse Spark 1.2 is a proprietary model released by Meta. GLM-4.5 is an open weight model released by Z.ai.
Other comparisons
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