GLM-5.3-Flash vs Kimi K3
Wins 1 of 8 areas
Agents
Wins 7 of 8 areas
Coding · Reasoning · Facts · Images and charts · Math · Long documents · Following instructions
Kimi K3 is the stronger all-rounder.GLM-5.3-Flash is cheaper and better at agents.
Scores updated · 42 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 software04Kimi K34 of 5 tests · 1 tie
- ReasoningHard problems that need careful thinking14Kimi K34 of 5 tests
- MathCompetition and research-level math03Kimi K33 of 3 tests
- FactsGetting facts right instead of making them up12Kimi K32 of 3 tests
- Images and chartsUnderstanding pictures, charts and video01Kimi K31 of 1 test
- Long documentsFinding answers in very long texts01Kimi K31 of 1 test
- Following instructionsDoing exactly what it is asked01Kimi K31 of 1 test
- AgentsCarrying out multi-step tasks on its own42GLM-5.3-Flash4 of 6 tests
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.
GLM-5.3-Flash costs 96% less for the same work.
The biggest differences
The three tests each model wins by the widest margin. Scores are out of 100.
Where Kimi K3 pulls ahead
- Completes tasks by operating a computer desktopOSWorld-Verified+70points ahead
- Extremely hard research-level math problemsFrontierMath Tier 4+21.9points ahead
- Answers hard knowledge questions correctlyAA-Omniscience · Accuracy+20.1points ahead
Where GLM-5.3-Flash pulls ahead
- Avoids making up answers it doesn't knowAA-Omniscience · Non-hallucination+25.6points ahead
- Complex command-line tasks across many fieldsTerminal-Bench 4.0+20.2points ahead
- Real work tasks from 44 professionsGDPVal+5.5points ahead
Every test, side by side
All 42 tests both models report. The winning score is in its model's colour; marks a score checked independently.
CodingKimi K3
- SciCodeKimi K3 by 7.951.659.5+7.9
- LiveBench · Agentic CodingKimi K3 by 5.456.862.2+5.4
- LMArena · WebDevKimi K3 by 49 rating points16091658+49 rating
- LiveBench · CodingKimi K3 by 2.57981.5+2.5
- Terminal-Bench 2.1tie84.385tie
AgentsGLM-5.3-Flash
- OSWorld-VerifiedKimi K3 by 7014.884.8+70
- Terminal-Bench 4.0GLM-5.3-Flash by 20.232.812.6+20.2
- BrowseCompKimi K3 by 15.27691.2+15.2
- GDPValGLM-5.3-Flash by 5.557.251.7+5.5
- AA IT-Bench SREGLM-5.3-Flash by 3.551.247.7+3.5
- τ-Bench V3 · BankingGLM-5.3-Flash by 1.247.246+1.2
ReasoningKimi K3
- LiveBench · ReasoningKimi K3 by 13.177.690.7+13.1
- CritPtKimi K3 by 815.423.4+8
- Humanity's Last ExamKimi K3 by 739.946.9+7
- ARC-AGI-2GLM-5.3-Flash by 5.465.860.4+5.4
- GPQA DiamondKimi K3 by 2.391.293.5+2.3
FactsKimi K3
- AA-Omniscience · Non-hallucinationGLM-5.3-Flash by 25.672.446.8+25.6
- AA-Omniscience · AccuracyKimi K3 by 20.127.547.6+20.1
- SimpleQA VerifiedKimi K3 by 18.63250.6+18.6
MathKimi K3
- FrontierMath Tier 4Kimi K3 by 21.917.139+21.9
- FrontierMath Tiers 1-3 (v2)Kimi K3 by 16.455.872.2+16.4
- LiveBench · MathematicsKimi K3 by 3.281.284.4+3.2
Following instructionsKimi K3
- LiveBench · Instruction FollowingKimi K3 by 18.652.871.4+18.6
Other results17 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.
- BabyVisionKimi K3 by 32.353.485.7+32.3
- AA-OmniscienceKimi K3 by 12.27.519.7+12.2
- DeepSearchQA (F1)Kimi K3 by 10.784.395+10.7
- HLE-DiamondKimi K3 by 8.718.226.9+8.7
- livebench_languageKimi K3 by 8.277.385.5+8.2
- JobBenchGLM-5.3-Flash by 7.860.752.9+7.8
- GDP (Surge AI)Kimi K3 by 6.615.422+6.6
- DeepSWE 1.1Kimi K3 by 5.663.469+5.6
- ToolathlonGLM-5.3-Flash by 5.278.473.2+5.2
- Artificial Analysis Coding IndexKimi K3 by 4.771.576.2+4.7
- ARC-AGI-1Kimi K3 by 3.59194.5+3.5
- livebench_data_analysisKimi K3 by 2.376.478.7+2.3
- Agents' Last ExamKimi K3 by 226.328.3+2
- AA IntelligenceKimi K3 by 1.841.843.6+1.8
- NL2RepoKimi K3 by 1.756.358+1.7
- OfficeQA Protie62.463.3tie
- AA Agentic Indextie51.250.6tie
Questions people ask
Which is better, GLM-5.3-Flash or Kimi K3?
Kimi K3 wins seven of the eight areas we test: coding, reasoning, facts, images and charts, math, long documents and following instructions. GLM-5.3-Flash wins agents, and costs 96% less.
Which is better for coding?
Kimi K3. It wins 4 of the 5 coding tests both models report; GLM-5.3-Flash wins none, and 1 is a tie.
Which is cheaper?
GLM-5.3-Flash costs $0.15 per million input tokens and $0.50 per million output tokens; Kimi K3 costs $3.00 and $15.00. That makes GLM-5.3-Flash about 96% cheaper for the same work.
How do you compare the two?
We use the 42 benchmark tests both models have published scores on. The verdict counts the 25 tests in the eight capability areas, and a gap under one point (ten on rating-style scales) counts as a tie. The other 17 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.