Gemini 3.5 Flash vs GLM-5.3
Wins 2 of 7 areas
Facts · Following instructions
Wins 5 of 7 areas
Coding · Agents · Reasoning · Math · Long documents
GLM-5.3 is the stronger all-rounder.Gemini 3.5 Flash is better at facts.
Scores updated · 33 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.
- CodingWriting and fixing software04GLM-5.34 of 5 tests · 1 tie
- AgentsCarrying out multi-step tasks on its own04GLM-5.34 of 4 tests
- MathCompetition and research-level math02GLM-5.32 of 3 tests · 1 tie
- ReasoningHard problems that need careful thinking12GLM-5.32 of 5 tests · 2 ties
- Long documentsFinding answers in very long texts01GLM-5.31 of 1 test
- FactsGetting facts right instead of making them up21Gemini 3.5 Flash2 of 3 tests
- Following instructionsDoing exactly what it is asked10Gemini 3.5 Flash1 of 1 test
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 costs 45% less for the same work.
The biggest differences
The three tests each model wins by the widest margin. Scores are out of 100.
Where GLM-5.3 pulls ahead
- Complex command-line tasks across many fieldsTerminal-Bench 4.0+35.3points ahead
- Avoids making up answers it doesn't knowAA-Omniscience · Non-hallucination+32.6points ahead
- Real work tasks from 44 professionsGDPVal+22.4points ahead
Where Gemini 3.5 Flash pulls ahead
- Short factual questions, answered correctlySimpleQA Verified+25.2points ahead
- Answers hard knowledge questions correctlyAA-Omniscience · Accuracy+17.5points ahead
- Common-sense trick questionsSimpleBench+10.5points ahead
Every test, side by side
All 33 tests both models report. The winning score is in its model's colour; marks a score checked independently.
CodingGLM-5.3
- LMArena · WebDevGLM-5.3 by 122 rating points15001622+122 rating
- LiveBench · Agentic CodingGLM-5.3 by 11.94960.9+11.9
- Terminal-Bench 2.1GLM-5.3 by 5.278.783.9+5.2
- SciCodeGLM-5.3 by 5.153.959+5.1
- LiveBench · Codingtie78.279tie
AgentsGLM-5.3
- Terminal-Bench 4.0GLM-5.3 by 35.36.641.9+35.3
- GDPValGLM-5.3 by 22.435.157.5+22.4
- τ-Bench V3 · BankingGLM-5.3 by 18.132.250.3+18.1
- AA IT-Bench SREGLM-5.3 by 5.840.346.1+5.8
ReasoningGLM-5.3
- SimpleBenchGemini 3.5 Flash by 10.576.766.2+10.5
- CritPtGLM-5.3 by 613.119.1+6
- LiveBench · ReasoningGLM-5.3 by 3.88285.8+3.8
- GPQA Diamondtie92.291.7tie
- Humanity's Last Examtie42.742.3tie
FactsGemini 3.5 Flash
- AA-Omniscience · Non-hallucinationGLM-5.3 by 32.637.870.4+32.6
- SimpleQA VerifiedGemini 3.5 Flash by 25.266.241+25.2
- AA-Omniscience · AccuracyGemini 3.5 Flash by 17.551.433.9+17.5
MathGLM-5.3
- FrontierMath Tiers 1-3 (v2)GLM-5.3 by 662.868.8+6
- FrontierMath Tier 4GLM-5.3 by 2.526.829.3+2.5
- LiveBench · Mathematicstie88.287.9tie
Following instructionsGemini 3.5 Flash
- LiveBench · Instruction FollowingGemini 3.5 Flash by 6.375.669.3+6.3
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 v2GLM-5.3 by 420 rating points13491769+420 rating
- HiL-Bench (Tools-allowed)GLM-5.3 by 30.627.758.3+30.6
- DeepSWEGLM-5.3 by 29.93766.9+29.9
- DeepSWE 1.1GLM-5.3 by 29.93766.9+29.9
- AA Agentic IndexGLM-5.3 by 26.127.353.4+26.1
- ToolathlonGLM-5.3 by 16.556.573+16.5
- AA IntelligenceGLM-5.3 by 12.232.644.8+12.2
- AA-OmniscienceGemini 3.5 Flash by 6.921.214.3+6.9
- livebench_data_analysisGLM-5.3 by 5.364.970.2+5.3
- Artificial Analysis Coding IndexGLM-5.3 by 4.770.174.8+4.7
- livebench_languageGemini 3.5 Flash by 4.784.679.9+4.7
Questions people ask
Which is better, Gemini 3.5 Flash or GLM-5.3?
GLM-5.3 wins five of the seven areas where both have results: coding, agents, reasoning, math and long documents. Gemini 3.5 Flash wins facts and following instructions.
Which is better for coding?
GLM-5.3. It wins 4 of the 5 coding tests both models report; Gemini 3.5 Flash wins none, and 1 is a tie.
Which is cheaper?
Gemini 3.5 Flash costs $1.50 per million input tokens and $9.00 per million output tokens; GLM-5.3 costs $1.40 and $4.40. That makes GLM-5.3 about 45% cheaper for the same work.
How do you compare the two?
We use the 33 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 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.