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Model comparison

Grok 4.5 vs Muse Spark 1.1

Data verified

Head-to-head evidence from 23 shared benchmark results across 5 categories. Overall scores shown here use the public BenchAlign v5 ranking lane.

76.72/100
Margin
0.7pts
winning →
77.44/100
2 category wins0 category wins

Public leaderboard positions: Grok 4.5 #7 (Supported); Muse Spark 1.1 #6 (Supported). Intervals and evidence labels describe ranking uncertainty, not a guarantee for a specific workload.

Evidence parity. Grok 4.5 and Muse Spark 1.1 share 23 comparable benchmark results. 2 of 8 categories are comparable. 5 results are unique to Grok 4.5; 16 to Muse Spark 1.1.

Updated July 23, 2026
Shared results
23
Grok 4.5 only
5
Muse Spark 1.1 only
16
Comparable categories
2 / 8

Pick Muse Spark 1.1 if you want the stronger benchmark profile. Grok 4.5 only becomes the better choice if coding is the priority.

Confidence note. This is a partial-evidence comparison with 23 shared benchmark results across 5 evidence categories; 2 of 8 categories currently have scoreable aggregates for both models. Treat the verdict as directional until coverage is more balanced.

Why this result

Muse Spark 1.1 has the cleaner BenchAlign overall profile here, landing at 77.44 versus 76.72. It is a real lead, but still close enough that category-level strengths matter more than the headline number.

Muse Spark 1.1 gives you the larger context window at 1M, compared with 500K for Grok 4.5.

Category breakdown

Exact category averages are shown below. Not measured means BenchLM does not have enough sourced public coverage for that model and category.

Category scores and score margins for Grok 4.5 and Muse Spark 1.1
CategoryGrok 4.5ΔMuse Spark 1.1
CodingGrok 4.564.7Margin← 3.2Muse Spark 1.161.5
AgenticGrok 4.583.3Margin← 2.9Muse Spark 1.180.4
KnowledgeGrok 4.5Not measuredMarginNo overlapMuse Spark 1.162.1
MultimodalGrok 4.5Not measuredMarginNo overlapMuse Spark 1.188.4

Decisive benchmark drivers

The largest measured benchmark gaps in this matchup, with exact reported values.

More
A · Grok 4.5B · Muse Spark 1.1

  1. Terminal-Bench 2.0

    Agentic
    Source ↗
    A 83.3%B 80%
    Winner: Grok 4.5Δ 3.3
    Terminal-Bench 2.0: Grok 4.5 scored 83.3%; Muse Spark 1.1 scored 80%. Grok 4.5 wins this benchmark.

  2. SWE-bench Pro

    Coding
    Source ↗
    A 64.7%B 61.5%
    Winner: Grok 4.5Δ 3.2
    SWE-bench Pro: Grok 4.5 scored 64.7%; Muse Spark 1.1 scored 61.5%. Grok 4.5 wins this benchmark.

Operational comparison

Runtime and commercial metrics are compared only when both models have a complete sourced value.

MetricGrok 4.5Muse Spark 1.1Comparison
Input / output priceUSD per 1M tokensGrok 4.5$2 input / $6 outputMuse Spark 1.1Not availableA complete price comparison is not available.
Generation speedtokens per secondGrok 4.5Not availableMuse Spark 1.1Not availableA complete speed comparison is not available.
First-answer latencyseconds to first tokenGrok 4.5Not availableMuse Spark 1.1Not availableA complete latency comparison is not available.
Context windowmaximum listed tokensGrok 4.5500KMuse Spark 1.11MMuse Spark 1.1 lists the larger context window.

Benchmark Deep Dive

AgenticGrok 4.5 wins
BenchmarkGrok 4.5Muse Spark 1.1Result
Terminal-Bench 2.0Source 83.3%80%Grok 4.5 leads
deepSweSource 53%53.3%Muse Spark 1.1 leads
AA Agentic IndexSource 45.7%37.5%Grok 4.5 leads
GDPval-AASource 51.7%43.7%Grok 4.5 leads
GDPval-AASource 15351374Grok 4.5 leads
AA BriefcaseSource 1323863Grok 4.5 leads
AA AutomationBenchSource 51.4%42.8%Grok 4.5 leads
AA EnterpriseOps-GymSource 40.8%—Not comparable
AA Harvey LABSource 92.4%93.1%Muse Spark 1.1 leads
AA Tau3 BankingSource 32.6%25.2%Grok 4.5 leads
aaTerminalBench21Source 81.6%77.9%Grok 4.5 leads
MCP AtlasSource —88.1%Not comparable
ToolathlonSource —75.6%Not comparable
OSWorld-VerifiedSource —80.8%Not comparable
DeepSearchQASource —84.9%Not comparable
CyberGymSource —59.0%Not comparable
Finance Agent v2Source —57.2%Not comparable
OSWorld 2.0Source —14.2%Not comparable
JobBenchSource —54.7%Not comparable
CybenchSource —92.9%Not comparable
ExploitGymSource —0.8%Not comparable
CodingGrok 4.5 wins
BenchmarkGrok 4.5Muse Spark 1.1Result
SWE-bench ProSource 64.7%61.5%Grok 4.5 leads
SWE MultilingualSource 78%—Not comparable
Terminal-Bench 2.0Source 83.3%80.0%Grok 4.5 leads
cursorBench32Source 66.7%—Not comparable
VulcanBench v3Source 91.3%—Not comparable
AA Coding IndexSource 72.5%71.3%Grok 4.5 leads
AA-SciCodeSource 54.1%58.2%Muse Spark 1.1 leads
Reasoning
BenchmarkGrok 4.5Muse Spark 1.1Result
AA-LCRSource 67.7%63.3%Grok 4.5 leads
CritPtSource 15.4%15.1%Grok 4.5 leads
MRCR 1MSource —54.1%Not comparable
Knowledge
BenchmarkGrok 4.5Muse Spark 1.1Result
Artificial Analysis Intelligence IndexSource 53.8%50.6%Grok 4.5 leads
AA-GPQA DiamondSource 93.1%89.8%Grok 4.5 leads
AA-HLESource 40.3%45.1%Muse Spark 1.1 leads
AA-Omniscience IndexSource 26.4%18.0%Grok 4.5 leads
AA-Omniscience AccuracySource 52.1%40.6%Grok 4.5 leads
AA-Omniscience Hallucination RateSource 53.5%38.1%Muse Spark 1.1 leads
HLESource —62.1%Not comparable
HLE w/o toolsSource —52.2%Not comparable
HealthBench ProfessionalSource —59.3%Not comparable
Multimodal
BenchmarkGrok 4.5Muse Spark 1.1Result
AA-MMMU-ProSource 80.4%—Not comparable
Design Arena WebsiteSource 13251299Grok 4.5 leads
CharXivSource —88.4%Not comparable
BabyVisionSource —76.3%Not comparable
Frequently Asked Questions (3)

Which is better, Grok 4.5 or Muse Spark 1.1?

Muse Spark 1.1 is ahead on BenchLM's BenchAlign leaderboard, 77.44 to 76.72. The biggest single separator in this matchup is Terminal-Bench 2.0, where the scores are 83.3% and 80%.

Which is better for coding, Grok 4.5 or Muse Spark 1.1?

Grok 4.5 has the edge for coding in this comparison, averaging 64.7 versus 61.5. Inside this category, AA-SciCode is the benchmark that creates the most daylight between them.

Which is better for agentic tasks, Grok 4.5 or Muse Spark 1.1?

Grok 4.5 has the edge for agentic tasks in this comparison, averaging 83.3 versus 80.4. Inside this category, AA Briefcase is the benchmark that creates the most daylight between them.

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Last updated: July 23, 2026

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