Muse Spark 1.1 vs Claude Opus 5
Wins 1 of 8 areas
Following instructions
Wins 6 of 8 areas
Coding · Agents · Reasoning · Facts · Math · Long documents
Claude Opus 5 is the stronger all-rounder.Muse Spark 1.1 is cheaper and better at following instructions.
Scores updated · 34 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 software15Claude Opus 55 of 6 tests
- ReasoningHard problems that need careful thinking04Claude Opus 54 of 4 tests
- AgentsCarrying out multi-step tasks on its own14Claude Opus 54 of 5 tests
- FactsGetting facts right instead of making them up12Claude Opus 52 of 3 tests
- MathCompetition and research-level math01Claude Opus 51 of 1 test
- Long documentsFinding answers in very long texts01Claude Opus 51 of 1 test
- Following instructionsDoing exactly what it is asked10Muse Spark 1.11 of 1 test
- Images and chartsUnderstanding pictures, charts and video11Even1 each
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 82% less for the same work.
The biggest differences
The three tests each model wins by the widest margin. Scores are out of 100.
Where Claude Opus 5 pulls ahead
- Complex command-line tasks across many fieldsTerminal-Bench 4.0+42.9points ahead
- Real work tasks from 44 professionsGDPVal+25.5points ahead
- Long, multi-file coding tasks in real codebasesSWE-bench Pro+17.7points ahead
Where Muse Spark 1.1 pulls ahead
- Avoids making up answers it doesn't knowAA-Omniscience · Non-hallucination+10.8points ahead
- Follows detailed instructions exactlyLiveBench · Instruction Following+5.8points ahead
- Reasoning about charts from research papersCharXiv (RQ)+4.7points ahead
Every test, side by side
All 34 tests both models report. The winning score is in its model's colour; marks a score checked independently.
CodingClaude Opus 5
- SWE-bench ProClaude Opus 5 by 17.761.579.2+17.7
- LMArena · WebDevClaude Opus 5 by 150 rating points15421692+150 rating
- Terminal-Bench 2.1Claude Opus 5 by 11.277.989.1+11.2
- LiveBench · Agentic CodingClaude Opus 5 by 6.758.565.2+6.7
- LiveBench · CodingClaude Opus 5 by 4.377.281.5+4.3
- SciCodeMuse Spark 1.1 by 2.458.856.4+2.4
AgentsClaude Opus 5
- Terminal-Bench 4.0Claude Opus 5 by 42.96.149+42.9
- GDPValClaude Opus 5 by 25.535.761.2+25.5
- τ-Bench V3 · BankingClaude Opus 5 by 10.331.842.1+10.3
- OSWorld-VerifiedClaude Opus 5 by 2.680.883.4+2.6
- MCP AtlasMuse Spark 1.1 by 2.388.185.8+2.3
ReasoningClaude Opus 5
- CritPtClaude Opus 5 by 1415.129.1+14
- Humanity's Last ExamClaude Opus 5 by 8.746.254.9+8.7
- LiveBench · ReasoningClaude Opus 5 by 3.587.791.2+3.5
- GPQA DiamondClaude Opus 5 by 3.489.893.2+3.4
FactsClaude Opus 5
- AA-Omniscience · Non-hallucinationMuse Spark 1.1 by 10.85039.2+10.8
- AA-Omniscience · AccuracyClaude Opus 5 by 8.85260.9+8.8
- SimpleQA VerifiedClaude Opus 5 by 2.157.859.9+2.1
Images and chartsEven
- CharXiv (RQ)Muse Spark 1.1 by 4.788.483.7+4.7
- LMArena · VisionClaude Opus 5 by 27 rating points12941321+27 rating
Following instructionsMuse Spark 1.1
- LiveBench · Instruction FollowingMuse Spark 1.1 by 5.869.663.8+5.8
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.
- GDPval-AA v2 EloClaude Opus 5 by 443 rating points13811824+443 rating
- AA Agentic IndexClaude Opus 5 by 28.727.556.2+28.7
- AA IntelligenceClaude Opus 5 by 17.133.750.8+17.1
- DeepSWE 1.1Claude Opus 5 by 15.85368.8+15.8
- livebench_languageClaude Opus 5 by 14.474.388.7+14.4
- JobBenchClaude Opus 5 by 1154.765.7+11
- AA-OmniscienceClaude Opus 5 by 928.137.1+9
- Artificial Analysis Coding IndexClaude Opus 5 by 6.771.378+6.7
- Toolathlon VerifiedClaude Opus 5 by 575.680.6+5
- livebench_data_analysisClaude Opus 5 by 272.574.5+2
- HealthBench Professionaltie59.359.8tie
Questions people ask
Which is better, Muse Spark 1.1 or Claude Opus 5?
Claude Opus 5 wins six of the eight areas we test: coding, agents, reasoning, facts, math and long documents. Muse Spark 1.1 wins following instructions, and costs 82% less. They are level on images and charts.
Which is better for coding?
Claude Opus 5. It wins 5 of the 6 coding tests both models report; Muse Spark 1.1 wins 1.
Which is cheaper?
Muse Spark 1.1 costs $1.25 per million input tokens and $4.25 per million output tokens; Claude Opus 5 costs $5.00 and $25.00. That makes Muse Spark 1.1 about 82% cheaper for the same work.
How do you compare the two?
We use the 34 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 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.