Kimi K3 vs Muse Spark 1.3
Wins 1 of 8 areas
Long documents
Wins 6 of 8 areas
Coding · Agents · Reasoning · Images and charts · Math · Following instructions
Muse Spark 1.3 is the stronger all-rounder.Kimi K3 is better at long documents.
Scores updated · 32 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.
- MathCompetition and research-level math03Muse Spark 1.33 of 3 tests
- ReasoningHard problems that need careful thinking13Muse Spark 1.33 of 5 tests · 1 tie
- AgentsCarrying out multi-step tasks on its own13Muse Spark 1.33 of 4 tests
- CodingWriting and fixing software01Muse Spark 1.31 of 5 tests · 4 ties
- Images and chartsUnderstanding pictures, charts and video01Muse Spark 1.31 of 1 test
- Following instructionsDoing exactly what it is asked01Muse Spark 1.31 of 1 test
- Long documentsFinding answers in very long texts10Kimi K31 of 1 test
- FactsGetting facts right instead of making them up11Even1 each
Images and charts, 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 1.3 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 1.3 pulls ahead
- Common-sense trick questionsSimpleBench+21.1points ahead
- Complex command-line tasks across many fieldsTerminal-Bench 4.0+20.7points ahead
- Avoids making up answers it doesn't knowAA-Omniscience · Non-hallucination+20.3points ahead
Where Kimi K3 pulls ahead
- Finds the root cause of IT system incidentsAA IT-Bench SRE+14.5points ahead
- Reasons across sets of long documentsAA-LCR+5.7points ahead
- Answers hard knowledge questions correctlyAA-Omniscience · Accuracy+4points ahead
Every test, side by side
All 32 tests both models report. The winning score is in its model's colour; marks a score checked independently.
CodingMuse Spark 1.3
- LiveBench · Agentic CodingMuse Spark 1.3 by 1.962.264.1+1.9
- SciCodetie59.558.8tie
- Terminal-Bench 2.1tie8584.3tie
- LiveBench · Codingtie81.581.1tie
- LMArena · WebDevtie16551659tie
AgentsMuse Spark 1.3
- Terminal-Bench 4.0Muse Spark 1.3 by 20.712.633.3+20.7
- AA IT-Bench SREKimi K3 by 14.547.733.2+14.5
- GDPValMuse Spark 1.3 by 7.351.759+7.3
- τ-Bench V3 · BankingMuse Spark 1.3 by 4.54650.5+4.5
ReasoningMuse Spark 1.3
- SimpleBenchMuse Spark 1.3 by 21.160.781.8+21.1
- Humanity's Last ExamMuse Spark 1.3 by 1.846.948.7+1.8
- CritPtMuse Spark 1.3 by 1.523.424.9+1.5
- LiveBench · ReasoningKimi K3 by 190.789.7+1
- GPQA Diamondtie93.593.5tie
FactsEven
- AA-Omniscience · Non-hallucinationMuse Spark 1.3 by 20.346.867.1+20.3
- AA-Omniscience · AccuracyKimi K3 by 447.643.6+4
Images and chartsMuse Spark 1.3
- MMMU-ProMuse Spark 1.3 by 1.580.582+1.5
MathMuse Spark 1.3
- LiveBench · MathematicsMuse Spark 1.3 by 11.684.496+11.6
- FrontierMath Tier 4Muse Spark 1.3 by 7.33946.3+7.3
- FrontierMath Tiers 1-3 (v2)Muse Spark 1.3 by 1.872.274+1.8
Following instructionsMuse Spark 1.3
- LiveBench · Instruction FollowingMuse Spark 1.3 by 6.671.478+6.6
Other results10 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.
- HiL-Bench (Tools-allowed)Muse Spark 1.3 by 24.242.766.9+24.2
- JobBenchMuse Spark 1.3 by 1252.964.9+12
- DeepSWE 1.1Muse Spark 1.3 by 6.46975.4+6.4
- DeepSearchQA (F1)Kimi K3 by 5.69589.4+5.6
- AA-OmniscienceMuse Spark 1.3 by 5.319.725+5.3
- AA Agentic IndexMuse Spark 1.3 by 5.150.655.7+5.1
- AA IntelligenceMuse Spark 1.3 by 4.543.648.1+4.5
- livebench_languageKimi K3 by 2.785.582.8+2.7
- livebench_data_analysistie78.779.6tie
- Artificial Analysis Coding Indextie76.275.8tie
Questions people ask
Which is better, Kimi K3 or Muse Spark 1.3?
Muse Spark 1.3 wins six of the eight areas we test: coding, agents, reasoning, images and charts, math and following instructions. Kimi K3 wins long documents. They are level on facts.
Which is better for coding?
Muse Spark 1.3. It wins 1 of the 5 coding tests both models report; Kimi K3 wins none, and 4 are ties.
Which is cheaper?
Kimi K3 costs $3.00 per million input tokens and $15.00 per million output tokens; Muse Spark 1.3 costs $1.25 and $4.25. That makes Muse Spark 1.3 about 69% cheaper for the same work.
How do you compare the two?
We use the 32 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 10 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.