GPT-5.6 Sol vs Muse Spark 1.1
Wins 7 of 8 areas
Coding · Agents · Reasoning · Facts · Math · Long documents · Following instructions
Wins 1 of 8 areas
Images and charts
GPT-5.6 Sol is the stronger all-rounder.Muse Spark 1.1 is cheaper and better at images and charts.
Scores updated · 36 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.
- ReasoningHard problems that need careful thinking40GPT-5.6 Sol4 of 4 tests
- AgentsCarrying out multi-step tasks on its own41GPT-5.6 Sol4 of 5 tests
- CodingWriting and fixing software42GPT-5.6 Sol4 of 6 tests
- FactsGetting facts right instead of making them up21GPT-5.6 Sol2 of 3 tests
- MathCompetition and research-level math10GPT-5.6 Sol1 of 1 test
- Long documentsFinding answers in very long texts10GPT-5.6 Sol1 of 1 test
- Following instructionsDoing exactly what it is asked10GPT-5.6 Sol1 of 1 test
- Images and chartsUnderstanding pictures, charts and video02Muse Spark 1.12 of 2 tests
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 77% less for the same work.
The biggest differences
The three tests each model wins by the widest margin. Scores are out of 100.
Where GPT-5.6 Sol pulls ahead
Where Muse Spark 1.1 pulls ahead
- Avoids making up answers it doesn't knowAA-Omniscience · Non-hallucination+42.2points ahead
- Multi-step tasks using many real software toolsMCP Atlas+4.5points ahead
- Reasoning about charts from research papersCharXiv (RQ)+2.6points ahead
Every test, side by side
All 36 tests both models report. The winning score is in its model's colour; marks a score checked independently.
CodingGPT-5.6 Sol
- Terminal-Bench 2.1GPT-5.6 Sol by 10.18877.9+10.1
- LMArena · WebDevGPT-5.6 Sol by 78 rating points16201542+78 rating
- LiveBench · CodingGPT-5.6 Sol by 6.783.977.2+6.7
- SWE-bench ProGPT-5.6 Sol by 3.164.661.5+3.1
- LiveBench · Agentic CodingMuse Spark 1.1 by 2.356.258.5+2.3
- SciCodeMuse Spark 1.1 by 1.757.158.8+1.7
AgentsGPT-5.6 Sol
- Terminal-Bench 4.0GPT-5.6 Sol by 33.839.96.1+33.8
- GDPValGPT-5.6 Sol by 19.955.635.7+19.9
- τ-Bench V3 · BankingGPT-5.6 Sol by 12.544.331.8+12.5
- MCP AtlasMuse Spark 1.1 by 4.583.688.1+4.5
- OSWorld-VerifiedGPT-5.6 Sol by 2.28380.8+2.2
ReasoningGPT-5.6 Sol
- CritPtGPT-5.6 Sol by 17.232.315.1+17.2
- GPQA DiamondGPT-5.6 Sol by 4.394.189.8+4.3
- LiveBench · ReasoningGPT-5.6 Sol by 491.787.7+4
- Humanity's Last ExamGPT-5.6 Sol by 3.349.546.2+3.3
FactsGPT-5.6 Sol
- AA-Omniscience · Non-hallucinationMuse Spark 1.1 by 42.27.850+42.2
- SimpleQA VerifiedGPT-5.6 Sol by 11.969.757.8+11.9
- AA-Omniscience · AccuracyGPT-5.6 Sol by 7.359.452+7.3
Images and chartsMuse Spark 1.1
- CharXiv (RQ)Muse Spark 1.1 by 2.685.888.4+2.6
- LMArena · VisionMuse Spark 1.1 by 15 rating points12791294+15 rating
Following instructionsGPT-5.6 Sol
- LiveBench · Instruction FollowingGPT-5.6 Sol by 2.371.869.6+2.3
Other results13 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.
- GDPval-AA v2 EloGPT-5.6 Sol by 329 rating points17101381+329 rating
- CyberGymGPT-5.6 Sol by 25.584.559+25.5
- AA Agentic IndexGPT-5.6 Sol by 2350.527.5+23
- DeepSWE 1.1GPT-5.6 Sol by 207353+20
- ToolathlonMuse Spark 1.1 by 17.65875.6+17.6
- livebench_languageGPT-5.6 Sol by 13.487.774.3+13.4
- AA IntelligenceGPT-5.6 Sol by 13.34733.7+13.3
- JobBenchMuse Spark 1.1 by 9.345.454.7+9.3
- livebench_data_analysisGPT-5.6 Sol by 7.279.872.5+7.2
- AA-OmniscienceMuse Spark 1.1 by 6.12228.1+6.1
- Artificial Analysis Coding IndexGPT-5.6 Sol by 6.177.471.3+6.1
- HealthBench ProfessionalGPT-5.6 Sol by 1.260.559.3+1.2
- Toolathlon Verifiedtie74.975.6tie
Questions people ask
Which is better, GPT-5.6 Sol or Muse Spark 1.1?
GPT-5.6 Sol wins seven of the eight areas we test: coding, agents, reasoning, facts, math, long documents and following instructions. Muse Spark 1.1 wins images and charts, and costs 77% less.
Which is better for coding?
GPT-5.6 Sol. It wins 4 of the 6 coding tests both models report; Muse Spark 1.1 wins 2.
Which is cheaper?
GPT-5.6 Sol costs $4.00 per million input tokens and $20.00 per million output tokens; Muse Spark 1.1 costs $1.25 and $4.25. That makes Muse Spark 1.1 about 77% cheaper for the same work.
How do you compare the two?
We use the 36 benchmark tests both models have published scores on. The verdict counts the 23 tests in the eight capability areas, and a gap under one point (ten on rating-style scales) counts as a tie. The other 13 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.