GPT-5.4 vs Muse Spark 1.1
Wins 3 of 8 areas
Reasoning · Math · Long documents
Wins 3 of 8 areas
Coding · Facts · Images and charts
The two are evenly matched.GPT-5.4 is better at reasoning and math; Muse Spark 1.1 at coding and facts.
Scores updated · 33 tests both models report · How we compare
Where each one wins
Tests won in each of the eight areas we test. Each piece is one test, so a longer bar means more evidence; grey means the two scored within a point of each other.
- CodingWriting and fixing software04Muse Spark 1.14 of 6 tests · 2 ties
- FactsGetting facts right instead of making them up03Muse Spark 1.13 of 3 tests
- Images and chartsUnderstanding pictures, charts and video01Muse Spark 1.11 of 2 tests · 1 tie
- ReasoningHard problems that need careful thinking21GPT-5.42 of 4 tests · 1 tie
- MathCompetition and research-level math10GPT-5.41 of 1 test
- Long documentsFinding answers in very long texts10GPT-5.41 of 1 test
- AgentsCarrying out multi-step tasks on its own22Even2 each
- Following instructionsDoing exactly what it is asked00Even0 each · 1 tie
Math, long documents and following instructions rest on a single test each.
What it costs
Prices per million tokens, roughly 750,000 words. The bars show the cost of a million tokens read plus a million written.
Muse Spark 1.1 costs 69% less for the same work.
The biggest differences
The three tests each model wins by the widest margin. Scores are out of 100.
Where Muse Spark 1.1 pulls ahead
- Avoids making up answers it doesn't knowAA-Omniscience · Non-hallucination+41.7points ahead
- Multi-step tasks using many real software toolsMCP Atlas+20.9points ahead
- Short factual questions, answered correctlySimpleQA Verified+12.7points ahead
Where GPT-5.4 pulls ahead
- Research-level physics problemsCritPt+8.3points ahead
- Customer-service tasks in a simulated bankτ-Bench V3 · Banking+7.8points ahead
- Fresh competition math problemsLiveBench · Mathematics+7.1points ahead
Every test, side by side
All 33 tests both models report. The winning score is in its model's colour; marks a score checked independently.
CodingMuse Spark 1.1
- LMArena · WebDevMuse Spark 1.1 by 77 rating points14651542+77 rating
- LiveBench · Agentic CodingMuse Spark 1.1 by 4.753.858.5+4.7
- SWE-bench ProMuse Spark 1.1 by 3.857.761.5+3.8
- SciCodeMuse Spark 1.1 by 2.256.658.8+2.2
- Terminal-Bench 2.1tie78.377.9tie
- LiveBench · Codingtie77.577.2tie
AgentsEven
- MCP AtlasMuse Spark 1.1 by 20.967.288.1+20.9
- τ-Bench V3 · BankingGPT-5.4 by 7.839.631.8+7.8
- OSWorld-VerifiedMuse Spark 1.1 by 5.87580.8+5.8
- GDPValGPT-5.4 by 1.737.435.7+1.7
ReasoningGPT-5.4
- CritPtGPT-5.4 by 8.323.415.1+8.3
- Humanity's Last ExamMuse Spark 1.1 by 2.543.746.2+2.5
- GPQA DiamondGPT-5.4 by 2.29289.8+2.2
- LiveBench · Reasoningtie88.187.7tie
FactsMuse Spark 1.1
- AA-Omniscience · Non-hallucinationMuse Spark 1.1 by 41.78.350+41.7
- SimpleQA VerifiedMuse Spark 1.1 by 12.745.157.8+12.7
- AA-Omniscience · AccuracyMuse Spark 1.1 by 1.250.952+1.2
Images and chartsMuse Spark 1.1
- CharXiv (RQ)Muse Spark 1.1 by 5.682.888.4+5.6
- LMArena · Visiontie13021294tie
Following instructionsEven
- LiveBench · Instruction Followingtie70.269.6tie
Other results11 tests, not counted
Tests outside the eight areas. They are not counted above: several are summary scores built from other tests, or the same test under another name.
- BabyVisionMuse Spark 1.1 by 26.649.776.3+26.6
- AA-OmniscienceMuse Spark 1.1 by 22.35.828.1+22.3
- ToolathlonMuse Spark 1.1 by 2154.675.6+21
- AA Agentic IndexGPT-5.4 by 16.744.227.5+16.7
- livebench_languageGPT-5.4 by 8.382.674.3+8.3
- CyberGymGPT-5.4 by 7.366.359+7.3
- livebench_data_analysisGPT-5.4 by 6.779.372.5+6.7
- DeepSearchQA (F1)Muse Spark 1.1 by 6.378.684.9+6.3
- AA IntelligenceGPT-5.4 by 5.33933.7+5.3
- DeepSWE 1.1Muse Spark 1.1 by 15253+1
- Artificial Analysis Coding Indextie71.171.3tie
Questions people ask
Which is better, GPT-5.4 or Muse Spark 1.1?
GPT-5.4 and Muse Spark 1.1 each win three of the eight areas we test. GPT-5.4 wins reasoning, math and long documents; Muse Spark 1.1 wins coding, facts and images and charts. Muse Spark 1.1 costs 69% less. They are level on agents and following instructions.
Which is better for coding?
Muse Spark 1.1. It wins 4 of the 6 coding tests both models report; GPT-5.4 wins none, and 2 are ties.
Which is cheaper?
GPT-5.4 costs $2.50 per million input tokens and $15.00 per million output tokens; Muse Spark 1.1 costs $1.25 and $4.25. That makes Muse Spark 1.1 about 69% cheaper for the same work.
How do you compare the two?
We use the 33 benchmark tests both models have published scores on. The verdict counts the 22 tests in the eight capability areas, and a gap under one point (ten on rating-style scales) counts as a tie. The other 11 are listed but not counted, because several are summary scores or repeat a test. Each score is the one shown on the model's own page.