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Model comparison

GPT-5.4 vs Muse Spark 1.1

Data verified

Head-to-head evidence from 27 shared benchmark results across 5 categories. Overall scores shown here use the public BenchAlign v5 ranking lane.

GPT-5.4
OpenAI
74.24/100
Margin
3.2pts
winning →
77.44/100
0 category wins4 category wins

Public leaderboard positions: GPT-5.4 #8 (Supported); Muse Spark 1.1 #6 (Supported). Intervals and evidence labels describe ranking uncertainty, not a guarantee for a specific workload.

Evidence parity. GPT-5.4 and Muse Spark 1.1 share 27 comparable benchmark results. 4 of 8 categories are comparable. 25 results are unique to GPT-5.4; 12 to Muse Spark 1.1.

Updated July 23, 2026
Shared results
27
GPT-5.4 only
25
Muse Spark 1.1 only
12
Comparable categories
4 / 8

Pick Muse Spark 1.1 if you want the stronger benchmark profile. GPT-5.4 only becomes the better choice if you need the larger 1.05M context window.

Confidence note. This is a partial-evidence comparison with 27 shared benchmark results across 5 evidence categories; 4 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 is clearly ahead on the BenchAlign aggregate, 77.44 to 74.24. The gap is large enough that you do not need to squint at the spreadsheet to see the difference.

Muse Spark 1.1's sharpest advantage is in multimodal & grounded, where it averages 88.4 against 73.2. The single biggest benchmark swing on the page is HLE, 52.1% to 62.1%.

GPT-5.4 gives you the larger context window at 1.05M, compared with 1M for Muse Spark 1.1.

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 GPT-5.4 and Muse Spark 1.1
CategoryGPT-5.4ΔMuse Spark 1.1
MultimodalGPT-5.473.2Margin→ 15.2Muse Spark 1.188.4
KnowledgeGPT-5.457.6Margin→ 4.5Muse Spark 1.162.1
CodingGPT-5.457.7Margin→ 3.8Muse Spark 1.161.5
AgenticGPT-5.477.2Margin→ 3.2Muse Spark 1.180.4
MathGPT-5.442.5MarginNo overlapMuse Spark 1.1Not measured

Decisive benchmark drivers

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

More
A · GPT-5.4B · Muse Spark 1.1

  1. HLE

    Knowledge
    Source ↗
    A 52.1%B 62.1%
    Winner: Muse Spark 1.1Δ 10
    HLE: GPT-5.4 scored 52.1%; Muse Spark 1.1 scored 62.1%. Muse Spark 1.1 wins this benchmark.

  2. OSWorld-Verified

    Agentic
    Source ↗
    A 75%B 80.8%
    Winner: Muse Spark 1.1Δ 5.8
    OSWorld-Verified: GPT-5.4 scored 75%; Muse Spark 1.1 scored 80.8%. Muse Spark 1.1 wins this benchmark.

  3. CharXiv

    Multimodal
    Source ↗
    A 82.8%B 88.4%
    Winner: Muse Spark 1.1Δ 5.6
    CharXiv: GPT-5.4 scored 82.8%; Muse Spark 1.1 scored 88.4%. Muse Spark 1.1 wins this benchmark.

  4. Terminal-Bench 2.0

    Agentic
    Source ↗
    A 75.1%B 80%
    Winner: Muse Spark 1.1Δ 4.9
    Terminal-Bench 2.0: GPT-5.4 scored 75.1%; Muse Spark 1.1 scored 80%. Muse Spark 1.1 wins this benchmark.

  5. SWE-bench Pro

    Coding
    Source ↗
    A 57.7%B 61.5%
    Winner: Muse Spark 1.1Δ 3.8
    SWE-bench Pro: GPT-5.4 scored 57.7%; Muse Spark 1.1 scored 61.5%. Muse Spark 1.1 wins this benchmark.

Operational comparison

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

MetricGPT-5.4Muse Spark 1.1Comparison
Input / output priceUSD per 1M tokensGPT-5.4$2.5 input / $15 outputMuse Spark 1.1Not availableA complete price comparison is not available.
Generation speedtokens per secondGPT-5.474 tok/sMuse Spark 1.1Not availableA complete speed comparison is not available.
First-answer latencyseconds to first tokenGPT-5.4151.79 sMuse Spark 1.1Not availableA complete latency comparison is not available.
Context windowmaximum listed tokensGPT-5.41.05MMuse Spark 1.11MGPT-5.4 lists the larger context window.

Benchmark Deep Dive

AgenticMuse Spark 1.1 wins
BenchmarkGPT-5.4Muse Spark 1.1Result
Terminal-Bench 2.0Source 75.1%80%Muse Spark 1.1 leads
CyberGymSource 79.0%59.0%GPT-5.4 leads
BrowseCompSource 82.7%—Not comparable
OSWorld-VerifiedSource 75%80.8%Muse Spark 1.1 leads
MCP AtlasSource 70.6%88.1%Muse Spark 1.1 leads
ToolathlonSource 54.6%75.6%Muse Spark 1.1 leads
τ²-bench resultsSource 87.1%—Not comparable
Claw-EvalSource 60.3%—Not comparable
DeepSearchQASource 73.6%84.9%Muse Spark 1.1 leads
AA Agentic IndexSource 41.1%37.5%GPT-5.4 leads
APEX-Agents-AASource 33.3%—Not comparable
GDPval-AASource 44.7%43.7%GPT-5.4 leads
GDPval-AASource 13951374GPT-5.4 leads
Gert LabsSource 64.89%—Not comparable
ResearchClawBenchSource 15.3%—Not comparable
JobBenchSource 38.9%54.7%Muse Spark 1.1 leads
ExploitGymSource 6.0%0.8%GPT-5.4 leads
Finance Agent v2Source —57.2%Not comparable
deepSweSource —53.3%Not comparable
OSWorld 2.0Source —14.2%Not comparable
CybenchSource —92.9%Not comparable
AA BriefcaseSource —863Not comparable
AA AutomationBenchSource —42.8%Not comparable
AA Harvey LABSource —93.1%Not comparable
AA Tau3 BankingSource —25.2%Not comparable
aaTerminalBench21Source —77.9%Not comparable
CodingMuse Spark 1.1 wins
BenchmarkGPT-5.4Muse Spark 1.1Result
LiveCodeBench ProSource 87.5%—Not comparable
SWE-bench ProSource 57.7%61.5%Muse Spark 1.1 leads
React Native EvalsSource 85.3%—Not comparable
Vibe Code BenchSource 67.42%—Not comparable
AA Coding IndexSource 71.0%71.3%Muse Spark 1.1 leads
AA-SciCodeSource 56.6%58.2%Muse Spark 1.1 leads
Terminal-Bench 2.0Source —80.0%Not comparable
Reasoning
BenchmarkGPT-5.4Muse Spark 1.1Result
AA-LCRSource 74.0%63.3%GPT-5.4 leads
CritPtSource 23.4%15.1%GPT-5.4 leads
MRCR 1MSource —54.1%Not comparable
KnowledgeMuse Spark 1.1 wins
BenchmarkGPT-5.4Muse Spark 1.1Result
GPQASource 92.8%—Not comparable
HLESource 52.1%62.1%Muse Spark 1.1 leads
HLE w/o toolsSource 39.8%52.2%Muse Spark 1.1 leads
GPQA-DSource 92.8%—Not comparable
HealthBench HardSource 40.1%—Not comparable
MedXpertQA (Text)Source 59.6%—Not comparable
Artificial Analysis Intelligence IndexSource 51.4%50.6%GPT-5.4 leads
AA-GPQA DiamondSource 92.0%89.8%GPT-5.4 leads
AA-HLESource 41.6%45.1%Muse Spark 1.1 leads
AA-Omniscience IndexSource 5.7%18.0%Muse Spark 1.1 leads
AA-Omniscience AccuracySource 50.0%40.6%GPT-5.4 leads
AA-Omniscience Hallucination RateSource 88.6%38.1%Muse Spark 1.1 leads
HealthBench ProfessionalSource 48.1%59.3%Muse Spark 1.1 leads
Math
BenchmarkGPT-5.4Muse Spark 1.1Result
FrontierMath v2 (Tiers 1-3)Source 47.600%—Not comparable
FrontierMath v2 (Tier 4)Source 27.100%—Not comparable
MultimodalMuse Spark 1.1 wins
BenchmarkGPT-5.4Muse Spark 1.1Result
MMMU-ProSource 81.2%—Not comparable
OfficeQA ProSource 53.2%—Not comparable
MMMU-Pro w/ PythonSource 82.1%—Not comparable
CharXivSource 82.8%88.4%Muse Spark 1.1 leads
ERQASource 65.4%—Not comparable
SimpleVQASource 61.1%—Not comparable
ScreenSpot ProSource 85.4%—Not comparable
ZeroBenchSource 41.0%—Not comparable
MedXpertQA (MM)Source 77.1%—Not comparable
AA-MMMU-ProSource 78.4%—Not comparable
Design Arena WebsiteSource 12501299Muse Spark 1.1 leads
BabyVisionSource —76.3%Not comparable
Inst. Following
BenchmarkGPT-5.4Muse Spark 1.1Result
AA-IFBenchSource 73.9%—Not comparable
Frequently Asked Questions (5)

Which is better, GPT-5.4 or Muse Spark 1.1?

Muse Spark 1.1 is ahead on BenchLM's BenchAlign leaderboard, 77.44 to 74.24. The biggest single separator in this matchup is HLE, where the scores are 52.1% and 62.1%.

Which is better for knowledge tasks, GPT-5.4 or Muse Spark 1.1?

Muse Spark 1.1 has the edge for knowledge tasks in this comparison, averaging 62.1 versus 57.6. Inside this category, AA-Omniscience Hallucination Rate is the benchmark that creates the most daylight between them.

Which is better for coding, GPT-5.4 or Muse Spark 1.1?

Muse Spark 1.1 has the edge for coding in this comparison, averaging 61.5 versus 57.7. Inside this category, SWE-bench Pro is the benchmark that creates the most daylight between them.

Which is better for agentic tasks, GPT-5.4 or Muse Spark 1.1?

Muse Spark 1.1 has the edge for agentic tasks in this comparison, averaging 80.4 versus 77.2. Inside this category, GDPval-AA is the benchmark that creates the most daylight between them.

Which is better for multimodal and grounded tasks, GPT-5.4 or Muse Spark 1.1?

Muse Spark 1.1 has the edge for multimodal and grounded tasks in this comparison, averaging 88.4 versus 73.2. Inside this category, Design Arena Website is the benchmark that creates the most daylight between them.

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