Comparing 2 models

Gemini 3.5 Flash vs GLM 5.3

Benchmarks through

Verdict

Gemini 3.5 Flash and GLM 5.3 are not yet ranked on the same task, so compare the specifications below. GLM 5.3 costs 19.0x less per input token. Only GLM 5.3 has open weights for self-hosting.

  • Choose GLM 5.3 for you need to self-host.

Built from the published task rankings below; ranks come from each task's own weighted benchmarks, so a win on one task says nothing about another.

metric
Model 1Gemini 3.5 Flash
Model 2GLM 5.3
Best for
Business Writing (#6)
Best Cheap LLM for High Volume (#2)
Provider
google
z-ai
Context
1.0MBest
1.0MBest
Input / 1M
$1.50
$0.079Best
Output / 1M
$9
$4.80Best
Tool use
yesBest
yesBest
Vision
yesBest
—
Reasoning
yesBest
yesBest
Open-weight
—
yesBest
Released
May 19, 2026
Aug 14, 2026

Measured head to head

Benchmarks both models were run on

EvaluationGemini 3.5 FlashGLM 5.3Source
Design Arena Coding1268 Elo1307 Elosource · 2026-10-16
Design Arena UI1272 Elo1314 Elosource · 2026-10-16
Design Arena Website1269 Elo1298 Elosource · 2026-10-16
FrontierMath Tiers 1-3 (Epoch AI)62.8% ± 2.968.8% ± 2.7source · 2026-06-10
GPQA Diamond (Epoch AI)88.9% ± 2.290.9% ± 1.6source · 2026-08-06
GPQA Diamond (Epoch AI)86.4% ± 2.490.9% ± 1.6source · 2026-07-15
GPQA Diamond (Epoch AI)92.8% ± 1.690.9% ± 1.6source · 2026-05-22
LiveBench Agentic Coding49.0%60.9%source · 2026-10-16
LiveBench Coding78.2%79.0%source · 2026-10-16
LiveBench Data Analysis64.9%70.2%source · 2026-10-16
LiveBench Instruction Following75.6%69.3%source · 2026-10-16
LiveBench Language84.6%79.9%source · 2026-10-16
LiveBench Math88.2%87.9%source · 2026-10-16
LiveBench Reasoning82%85.8%source · 2026-10-16
LMArena Creative Writing1468 Elo1456 Elosource · 2026-10-15
LMArena Instruction Following1467 Elo1476 Elosource · 2026-10-15
LMArena Long Query1483 Elo1481 Elosource · 2026-10-15
LMArena Math1503 Elo1491 Elosource · 2026-10-15
LMArena Text1477 Elo1479 Elosource · 2026-10-15
LMArena Text Factuality1477 Elo1466 Elosource · 2026-10-15
LMArena WebDev1499 Elo1621 Elosource · 2026-10-13
OTIS Mock AIME (Epoch AI)88.9% ± 4.791.1% ± 3.5source · 2026-08-06
OTIS Mock AIME (Epoch AI)80% ± 691.1% ± 3.5source · 2026-07-15
OTIS Mock AIME (Epoch AI)95.6% ± 2.791.1% ± 3.5source · 2026-05-25
SimpleQA Verified (Epoch AI)66.2% ± 1.541% ± 1.6source · 2026-08-27

Values are as published by each evaluator, in its own units; rows from different evaluators are not on a common scale.