GLM 5.3 Flash vs Nemotron 3 Ultra

GLM 5.3 Flash leads Nemotron 3 Ultra on coding, 57.7 to 30.0 on the Vibe Coding Index, and GLM 5.3 Flash costs 4.8x less per output token ($0.50 vs $2.40 per million). Updated October 22, 2026; 62 benchmarks have a result for both.

Replace GLM 5.3 Flash Replace Nemotron 3 Ultra

GLM 5.3 FlashZ.ai

Coding: 57.7
Overall: 66.0
Output $/M: $0.50

Nemotron 3 UltraNVIDIA

Coding: 30.0
Overall: 53.1
Output $/M: $2.40

vs boards won of 62 shared, 1 tied

GLM 5.3 Flash or Nemotron 3 Ultra: which to pick

Pick GLM 5.3 Flash for coding: it scores 57.7 on the Vibe Coding Index against 30.0 for Nemotron 3 Ultra.

Pick Nemotron 3 Ultra for work measured by LiveCodeBench (Vals AI) or Mystery game puzzles, where it leads.

Model AGLM 5.3 FlashZ.ai57.7/1006 independent benchmarks$0.02 per solved task Model BNemotron 3 UltraNVIDIA30.0/1003 independent benchmarksNo cost per solved task

62409

Shared results: 62
GLM 5.3 Flash only: 40
Nemotron 3 Ultra only: 9
Like-for-like categories: 8 of 9

Only benchmarks that tested both models count toward a pick; a result only one model has is shown but not compared.

Which one for your work

Each card is decided by one number both models carry. Where only one has it, the card says so and makes no call.

Coding
Vibe Coding Index, six public coding benchmarks
GLM 5.3 Flash
GLM 5.3 Flash scores 57.7 against 30.0.
6 and 3 benchmarks behind the scores
Intelligence
AA Intelligence Index
GLM 5.3 Flash
GLM 5.3 Flash leads, 41.8 against 22.9.
Same board, both measured
Agentic work
AA Agentic Index
GLM 5.3 Flash
GLM 5.3 Flash leads, 50.9 against 20.1.
Same board, both measured
Reasoning
GPQA Diamond
GLM 5.3 Flash
GLM 5.3 Flash leads, 86.4% against 86.1%.
Same board, both measured
Knowledge
MMLU Pro
GLM 5.3 Flash
GLM 5.3 Flash leads, 86.1% against 85.8%.
Same board, both measured
Web design
Design Arena: websites
GLM 5.3 Flash
GLM 5.3 Flash leads, 1271 against 1145.
Same board, both measured
General
Vals Index
No call
Only GLM 5.3 Flash has a Vals Index result, 50.9%.
Directional only
Long documents
Listed context window
GLM 5.3 Flash
GLM 5.3 Flash takes 1.05M tokens against 262K.
Listed by OpenRouter
Everyday cost
1K input + 500 output tokens
GLM 5.3 Flash
GLM 5.3 Flash $0.0004, Nemotron 3 Ultra $0.0018 per turn.
List prices
Cost per solved task
One SWE-bench Verified task, solved
No call
Only GLM 5.3 Flash has the number, $0.02.
Directional only

At a glance

Coding index: GLM 5.3 Flash 57.7 from 6 benchmarks, Nemotron 3 Ultra 30.0 from 3 benchmarks.
Widest category: Agentic work, 27.0 points apart on average over 5 shared benchmarks.
Widest single gap: AA Agentic Index: GLM 5.3 Flash 50.9 against Nemotron 3 Ultra 20.1, 30.8 points apart on a 0 to 100 scale.
Output price: GLM 5.3 Flash $0.50 against Nemotron 3 Ultra $2.40 per million output tokens, 4.8x apart.
Context window: GLM 5.3 Flash takes 1.05M tokens, Nemotron 3 Ultra 262K.

Benchmark by benchmark

First the score: boards each model leads, per category, where both have a result. Then every board, a category to a fold; bars are each result on a 0 to 100 scale, so compare the two in a row, not one row with another.

Boards won, where both have a result
Category	GLM 5.3 Flash	Nemotron 3 Ultra	Ties
Coding	9	1	1 tie
Intelligence	2	0
Agentic work	5	0
Reasoning	7	1
Math	4	0
Knowledge	7	0
Web design	8	0
General	16	1
All shared boards	58	3	1 tie

CodingLike-for-likeSix of these boards feed the Vibe Coding Index91

Coding benchmarks for GLM 5.3 Flash and Nemotron 3 Ultra
Benchmark	GLM 5.3 Flash	Nemotron 3 Ultra	Leader
LiveBench coding	80.6%	Not measured	Only GLM 5.3 Flash measured
LMArena WebDev	1607	Not measured	Only GLM 5.3 Flash measured
AA Coding Index	71.5	49.3	GLM 5.3 Flash
LiveCodeBench (Vals AI)	80.5%	86.0%	Nemotron 3 Ultra
SWE-bench Verified (Vals AI)	92.0%	69.0%	GLM 5.3 Flash
Terminal-Bench 4 (Vals AI)	37.4%	Not measured	Only GLM 5.3 Flash measured
Vibe Code Bench (Vals AI)	30.8%	7.6%	GLM 5.3 Flash
Code migration (Vals AI)	20.5%	4.9%	GLM 5.3 Flash
ProgramBench (Vals AI)	0.0%	0.0%	Tie
IOI (Vals AI)	52.5%	Not measured	Only GLM 5.3 Flash measured
Terminal-Bench 2.1 (Vals AI)	62.9%	50.9%	GLM 5.3 Flash
Vibe Code Bench 1-100 (Vals AI)	16.0%	Not measured	Only GLM 5.3 Flash measured
SkillsBench (Vals AI)	40.2%	Not measured	Only GLM 5.3 Flash measured
CyberBench (Vals AI)	67.9%	Not measured	Only GLM 5.3 Flash measured
SciCode	51.6%	40.3%	GLM 5.3 Flash
Terminal-Bench Hard (Artificial Analysis run)	Not measured	36.4%	Only Nemotron 3 Ultra measured
FrontierCode	31.8%	13.6%	GLM 5.3 Flash
FrontierSWE	18.1%	Not measured	Only GLM 5.3 Flash measured
WeirdML	Not measured	43.5%	Only Nemotron 3 Ultra measured
ALE-Bench	303.6	Not measured	Only GLM 5.3 Flash measured
LMArena Text: coding	1507	1468	GLM 5.3 Flash
LMArena Text: software and IT	1500	1468	GLM 5.3 Flash
LMArena WebDev: React	1624	Not measured	Only GLM 5.3 Flash measured
LMArena WebDev: HTML	1577	Not measured	Only GLM 5.3 Flash measured
LMArena WebDev: from an image	1578	Not measured	Only GLM 5.3 Flash measured
Neither model has a result on the other 18 boards here

IntelligenceLike-for-likePublic boards, shown as published, kept out of the index20

Intelligence benchmarks for GLM 5.3 Flash and Nemotron 3 Ultra
Benchmark	GLM 5.3 Flash	Nemotron 3 Ultra	Leader
AA Intelligence Index	41.8	22.9	GLM 5.3 Flash
Epoch Capabilities Index	153.1	146.0	GLM 5.3 Flash

Agentic workLike-for-likePublic boards, shown as published, kept out of the index50

Agentic work benchmarks for GLM 5.3 Flash and Nemotron 3 Ultra
Benchmark	GLM 5.3 Flash	Nemotron 3 Ultra	Leader
AA Agentic Index	50.9	20.1	GLM 5.3 Flash
LiveBench research	70.1%	Not measured	Only GLM 5.3 Flash measured
LiveBench browser	84.0%	Not measured	Only GLM 5.3 Flash measured
LiveBench long agentic	28.4%	Not measured	Only GLM 5.3 Flash measured
SREBench (Vals AI)	0.8%	Not measured	Only GLM 5.3 Flash measured
Finance Agent (Vals AI)	57.9%	37.7%	GLM 5.3 Flash
Tax Agent Bench (Vals AI)	31.6%	Not measured	Only GLM 5.3 Flash measured
Legal Research Bench (Vals AI)	45.2%	15.4%	GLM 5.3 Flash
Harvey's Legal Agent Benchmark (Vals AI)	10.4%	Not measured	Only GLM 5.3 Flash measured
Excel Modeling Benchmark (Vals AI)	55.9%	31.7%	GLM 5.3 Flash
Terminal-Bench-Science (Vals AI)	2.9%	Not measured	Only GLM 5.3 Flash measured
τ²-Bench Telecom	Not measured	83.3%	Only Nemotron 3 Ultra measured
APEX-Agents	52.8%	22.7%	GLM 5.3 Flash
MCP Atlas	Not measured	63.1%	Only Nemotron 3 Ultra measured
Neither model has a result on the other 28 boards here

ReasoningLike-for-likePublic boards, shown as published, kept out of the index71

Reasoning benchmarks for GLM 5.3 Flash and Nemotron 3 Ultra
Benchmark	GLM 5.3 Flash	Nemotron 3 Ultra	Leader
GPQA Diamond	86.4%	86.1%	GLM 5.3 Flash
LiveBench reasoning	77.6%	Not measured	Only GLM 5.3 Flash measured
MMMU Pro (Vals AI)	86.0%	Not measured	Only GLM 5.3 Flash measured
GPQA Diamond (Artificial Analysis run)	91.2%	86.7%	GLM 5.3 Flash
Humanity's Last Exam (Artificial Analysis run)	39.9%	28.4%	GLM 5.3 Flash
GPQA Diamond (Epoch AI run)	90.2%	85.4%	GLM 5.3 Flash
ARC-AGI	91.0%	Not measured	Only GLM 5.3 Flash measured
ARC-AGI-2	65.8%	Not measured	Only GLM 5.3 Flash measured
Chess puzzles	21.0%	Not measured	Only GLM 5.3 Flash measured
Mystery game puzzles	8.0%	20.0%	Nemotron 3 Ultra
LMArena Text: hard prompts	1490	1452	GLM 5.3 Flash
LMArena Text: expert	1511	1472	GLM 5.3 Flash
LMArena Text: hard prompts in English	1488	1453	GLM 5.3 Flash
LMArena Vision: diagrams	1317	Not measured	Only GLM 5.3 Flash measured
LMArena Vision: homework	1318	Not measured	Only GLM 5.3 Flash measured
Neither model has a result on the other 8 boards here

MathLike-for-likePublic boards, shown as published, kept out of the index40

Math benchmarks for GLM 5.3 Flash and Nemotron 3 Ultra
Benchmark	GLM 5.3 Flash	Nemotron 3 Ultra	Leader
OTIS Mock AIME	93.9%	86.7%	GLM 5.3 Flash
FrontierMath, tiers 1 to 3	55.8%	Not measured	Only GLM 5.3 Flash measured
FrontierMath, tier 4	17.1%	Not measured	Only GLM 5.3 Flash measured
ProofBench	21.0%	2.0%	GLM 5.3 Flash
LMArena Text: math	1503	1457	GLM 5.3 Flash
LMArena Text: mathematical work	1497	1461	GLM 5.3 Flash
Neither model has a result on the other 8 boards here

KnowledgeLike-for-likePublic boards, shown as published, kept out of the index70

Knowledge benchmarks for GLM 5.3 Flash and Nemotron 3 Ultra
Benchmark	GLM 5.3 Flash	Nemotron 3 Ultra	Leader
MMLU Pro	86.1%	85.8%	GLM 5.3 Flash
LegalBench (Vals AI)	83.9%	82.1%	GLM 5.3 Flash
CorpFin (Vals AI)	Not measured	65.5%	Only Nemotron 3 Ultra measured
TaxEval (Vals AI)	75.6%	73.1%	GLM 5.3 Flash
MedCode (Vals AI)	Not measured	38.6%	Only Nemotron 3 Ultra measured
LMArena Text: science	1484	1465	GLM 5.3 Flash
LMArena Text: medicine and healthcare	1475	1456	GLM 5.3 Flash
LMArena Text: legal and government	1473	1452	GLM 5.3 Flash
LMArena Text: business and finance	1460	1434	GLM 5.3 Flash
Neither model has a result on the other 11 boards here

Web designLike-for-likePublic boards, shown as published, kept out of the index80

Web design benchmarks for GLM 5.3 Flash and Nemotron 3 Ultra
Benchmark	GLM 5.3 Flash	Nemotron 3 Ultra	Leader
Design Arena: websites	1271	1145	GLM 5.3 Flash
Design Arena: UI components	1314	1135	GLM 5.3 Flash
Design Arena: game dev	1277	1138	GLM 5.3 Flash
Design Arena: data viz	1262	1141	GLM 5.3 Flash
Design Arena: 3D	1315	1131	GLM 5.3 Flash
Design Arena: all code categories	1281	1146	GLM 5.3 Flash
Design Arena: SVG	1284	1069	GLM 5.3 Flash
Design Arena: ASCII art	1267	1100	GLM 5.3 Flash
LiveBench design	77.2%	Not measured	Only GLM 5.3 Flash measured

GeneralLike-for-likePublic boards, shown as published, kept out of the index161

General benchmarks for GLM 5.3 Flash and Nemotron 3 Ultra
Benchmark	GLM 5.3 Flash	Nemotron 3 Ultra	Leader
Vals Index	50.9%	Not measured	Only GLM 5.3 Flash measured
LiveBench data analysis	76.4%	Not measured	Only GLM 5.3 Flash measured
MedScribe (Vals AI)	88.9%	Not measured	Only GLM 5.3 Flash measured
IFBench	Not measured	81.4%	Only Nemotron 3 Ultra measured
Long context reasoning (AA-LCR)	80.0%	79.3%	GLM 5.3 Flash
DTBench	Not measured	90.1%	Only Nemotron 3 Ultra measured
LMCA	Not measured	36.9%	Only Nemotron 3 Ultra measured
Surface Evolver Bench	52.5%	Not measured	Only GLM 5.3 Flash measured
LMArena Text	1471	1445	GLM 5.3 Flash
LMArena Text: instruction following	1478	1418	GLM 5.3 Flash
LMArena Text: creative writing	1441	1399	GLM 5.3 Flash
LMArena Vision	1294	Not measured	Only GLM 5.3 Flash measured
LMArena Text: English	1474	1455	GLM 5.3 Flash
LMArena Text: non-English	1462	1427	GLM 5.3 Flash
LMArena Text: Chinese	1531	1497	GLM 5.3 Flash
LMArena Text: German	1462	1472	Nemotron 3 Ultra
LMArena Text: Japanese	1444	Not measured	Only GLM 5.3 Flash measured
LMArena Text: Korean	1436	1384	GLM 5.3 Flash
LMArena Text: French	1491	1472	GLM 5.3 Flash
LMArena Text: Spanish	1475	1455	GLM 5.3 Flash
LMArena Text: Russian	1465	1417	GLM 5.3 Flash
LMArena Text: Polish	1450	1385	GLM 5.3 Flash
LMArena Text: multi-turn	1469	1411	GLM 5.3 Flash
LMArena Text: longer queries	1481	1437	GLM 5.3 Flash
LMArena Text: writing and language	1455	1406	GLM 5.3 Flash
LMArena Text: entertainment and media	1440	1397	GLM 5.3 Flash
LMArena Vision: English	1295	Not measured	Only GLM 5.3 Flash measured
LMArena Vision: Chinese	1363	Not measured	Only GLM 5.3 Flash measured
LMArena Vision: reading text	1299	Not measured	Only GLM 5.3 Flash measured
LMArena Vision: humor	1279	Not measured	Only GLM 5.3 Flash measured
LMArena Vision: creative writing	1270	Not measured	Only GLM 5.3 Flash measured
Neither model has a result on the other 17 boards here

Image generationNot comparablePublic boards, shown as published, kept out of the index0 boards, none shared

Image generation benchmarks for GLM 5.3 Flash and Nemotron 3 Ultra
Benchmark	GLM 5.3 Flash	Nemotron 3 Ultra	Leader
Neither model has a result on 5 boards here

What each workload costs

Three fixed token mixes at each model's listed price, so per-token rates become a bill.

Chat turn

1K input + 500 output tokens

GLM 5.3 Flash$0.0004Fits in one request

Nemotron 3 Ultra$0.0018Fits in one request

GLM 5.3 Flash costs less

Repository review

50K input + 3K output tokens

GLM 5.3 Flash$0.0090Fits in one request

Nemotron 3 Ultra$0.037Fits in one request

GLM 5.3 Flash costs less

Agent loop

200K input + 10K output tokens

GLM 5.3 Flash$0.035Fits in one request

Nemotron 3 Ultra$0.144Fits in one request

GLM 5.3 Flash costs less

Listed OpenRouter rates, without cache or batch discounts. A workload that does not fit a model's context window would need splitting.

Specification differences

The leading value in a row is marked; a row with a missing value names no leader. Our two rows are marked in red.

Specifications of GLM 5.3 Flash and Nemotron 3 Ultra
Specification	Z.ai GLM 5.3 Flash	NVIDIA Nemotron 3 Ultra
Maker	Z.ai	NVIDIA
Weights	Open weights	Open weights
Released	August 26, 2026	June 4, 2026
Context window	1.05M	262K
Input $/Mtok	$0.15	$0.60
Output $/Mtok	$0.50	$2.40
Coding index	57.7	30.0
Independent measurements behind it	6	3
Cost per solved task	$0.02	Not computable
Source	OpenRouter listing	OpenRouter listing

Questions

Is GLM 5.3 Flash better than Nemotron 3 Ultra for coding?

Pick GLM 5.3 Flash for coding: it scores 57.7 on the Vibe Coding Index against 30.0 for Nemotron 3 Ultra. Pick Nemotron 3 Ultra for work measured by LiveCodeBench (Vals AI) or Mystery game puzzles, where it leads.

Which is cheaper, GLM 5.3 Flash or Nemotron 3 Ultra?

GLM 5.3 Flash costs $0.15 per million input tokens and $0.50 per million output tokens; Nemotron 3 Ultra costs $0.60 and $2.40. Cost per solved task is known for GLM 5.3 Flash only.

Which has the bigger context window, GLM 5.3 Flash or Nemotron 3 Ultra?

GLM 5.3 Flash, with 1.05M tokens against 262K.

How many benchmarks is the GLM 5.3 Flash vs Nemotron 3 Ultra comparison based on?

62 benchmarks have a result for both models as of October 22, 2026. GLM 5.3 Flash's coding index rests on 6 independent benchmarks and Nemotron 3 Ultra's on 3. Where only one model has a result, the page says so instead of naming a winner.

Compare next

Embed this comparison on your site

Free under CC BY 4.0, while the source link stays visible. Preview the frame · Terms and other embeds

<iframe src="https://llmbenchmark.ai/embed/compare/glm-5-3-flash-vs-nvidia-nemotron-3-ultra-550b-a55b" title="GLM 5.3 Flash vs Nemotron 3 Ultra, LLMBenchmark.ai" width="100%" height="360" style="border:0;max-width:100%" loading="lazy"></iframe>
<p style="font:13px/1.4 sans-serif;margin:6px 0 0">Source: <a href="https://llmbenchmark.ai/compare/glm-5-3-flash-vs-nvidia-nemotron-3-ultra-550b-a55b">LLMBenchmark.ai, GLM 5.3 Flash vs Nemotron 3 Ultra</a></p>

GLM 5.3 Flash or Nemotron 3 Ultra: which to pick

Which one for your work

Coding

Intelligence

Agentic work

Reasoning

Knowledge

Web design

General

Long documents

Everyday cost

Cost per solved task

At a glance

Benchmark by benchmark

What each workload costs

Chat turn

Repository review

Agent loop

Specification differences

Questions

Compare next