Claude Opus 4.6 vs Muse Spark
Wins 3 of 7 areas
Coding · Agents · Reasoning
Wins 3 of 7 areas
Facts · Images and charts · Following instructions
The two are evenly matched.Claude Opus 4.6 is better at reasoning and coding; Muse Spark at following instructions and facts.
Scores updated · 30 tests both models report · How we compare
Where each one wins
Tests won in each of the seven areas where both have results. 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 thinking30Claude Opus 4.63 of 4 tests · 1 tie
- CodingWriting and fixing software20Claude Opus 4.62 of 5 tests · 3 ties
- AgentsCarrying out multi-step tasks on its own10Claude Opus 4.61 of 1 test
- Following instructionsDoing exactly what it is asked02Muse Spark2 of 2 tests
- FactsGetting facts right instead of making them up12Muse Spark2 of 3 tests
- Images and chartsUnderstanding pictures, charts and video12Muse Spark2 of 3 tests
- Long documentsFinding answers in very long texts00Even0 each · 1 tie
Agents and long documents 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.
The biggest differences
The three tests each model wins by the widest margin. Scores are out of 100.
Where Claude Opus 4.6 pulls ahead
- Real work tasks from 44 professionsGDPVal+30.8points ahead
- Abstract visual puzzles that people can solveARC-AGI-2+26.3points ahead
- Avoids making up answers it doesn't knowAA-Omniscience · Non-hallucination+21.4points ahead
Where Muse Spark pulls ahead
- Keeps track of context across a multi-turn chatMulti-Challenge+38.3points ahead
- Follows unfamiliar, precisely checkable instructionsIFBench+22.8points ahead
- Short factual questions, answered correctlySimpleQA Verified+19.3points ahead
Every test, side by side
All 30 tests both models report. The winning score is in its model's colour; marks a score checked independently.
CodingClaude Opus 4.6
- SWE-bench VerifiedClaude Opus 4.6 by 3.480.877.4+3.4
- SWE-bench ProClaude Opus 4.6 by 153.452.4+1
- Terminal-Bench Hardtie46.245.5tie
- LMArena · WebDevtie15461540tie
- SciCodetie51.951.5tie
ReasoningClaude Opus 4.6
- ARC-AGI-2Claude Opus 4.6 by 26.368.842.5+26.3
- CritPtClaude Opus 4.6 by 1.312.611.3+1.3
- GPQA DiamondClaude Opus 4.6 by 1.289.688.4+1.2
- Humanity's Last Examtie39.940.7tie
FactsMuse Spark
- AA-Omniscience · Non-hallucinationClaude Opus 4.6 by 21.437.215.8+21.4
- SimpleQA VerifiedMuse Spark by 19.34766.3+19.3
- AA-Omniscience · AccuracyMuse Spark by 2.64749.6+2.6
Images and chartsMuse Spark
- CharXiv (RQ)Muse Spark by 977.486.4+9
- MMMU-ProMuse Spark by 5.175.480.5+5.1
- LMArena · VisionClaude Opus 4.6 by 11 rating points13161305+11 rating
Following instructionsMuse Spark
- Multi-ChallengeMuse Spark by 38.337.175.5+38.3
- IFBenchMuse Spark by 22.853.175.9+22.8
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.
- AA Agentic IndexClaude Opus 4.6 by 38.967.628.7+38.9
- CyberGymClaude Opus 4.6 by 30.373.843.5+30.3
- ScreenSpot-Pro (No tools)Muse Spark by 26.457.784.1+26.4
- ERQAMuse Spark by 23.940.864.7+23.9
- DeepSearchQA (F1)Claude Opus 4.6 by 16.591.374.8+16.5
- Artificial Analysis Coding IndexMuse Spark by 10.548.158.6+10.5
- frontiermath_tier_4_v1Claude Opus 4.6 by 8.322.914.6+8.3
- AA-OmniscienceClaude Opus 4.6 by 6.513.77.2+6.5
- Terminal-Bench 2.0Claude Opus 4.6 by 6.465.459+6.4
- AA Intelligencetie31.931.3tie
- τ²-Bench Telecom (AA run)tie92.191.5tie
Questions people ask
Which is better, Claude Opus 4.6 or Muse Spark?
Claude Opus 4.6 and Muse Spark each win three of the seven areas where both have results. Claude Opus 4.6 wins coding, agents and reasoning; Muse Spark wins facts, images and charts and following instructions. They are level on long documents.
Which is better for coding?
Claude Opus 4.6. It wins 2 of the 5 coding tests both models report; Muse Spark wins none, and 3 are ties.
How do you compare the two?
We use the 30 benchmark tests both models have published scores on. The verdict counts the 19 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.