Model comparison
GLM-5.3 vs Mercury
GLM-5.3 is the stronger model overall, scoring 54.8 to 37.6 on the Noometry Index.
Last verified . 8 shared benchmarks.
Summary
- They share 8 benchmarks with published results for both. GLM-5.3 scores higher in 6 categories and Mercury in 0 categories; 6 gaps are clear of the uncertainty.
- The widest gap is in writing & preference, where GLM-5.3 leads 75.7 to 46.2.
- GLM-5.3 has downloadable open weights; the other is API-only.
Side by side
| GLM-5.3 | Mercury | |
|---|---|---|
| Provider | Z.ai (Zhipu) | Inception |
| Noometry Index | 54.8 | 37.6 |
| Released | 2026-08-14 | — |
| Weights | Open | Proprietary |
| Context window | 1M | — |
| Max output | 131K | — |
| Input $ / M tokens | $1.40 | — |
| Output $ / M tokens | $4.40 | — |
| Results tracked | 42 | 9 |
Sponsored placements are available on pages like this one. Advertise on Noometry
Category by category
Coding GLM-5.3 leads
GLM-5.3: 59.5 (#14), Mercury: 38.7 (#170)
| Benchmark | GLM-5.3 | Mercury |
|---|---|---|
| LMArena Coding | 1496 | 1322 |
| DeepSWE | 69% | — |
| FrontierCode | 40.1% | — |
| CursorBench | 42.6% | — |
| LMArena WebDev | 1622 | — |
| FrontierSWE | 30.2% | — |
| SciCode | 59% | — |
| WeirdML | 75.4% | — |
| ALE-Bench | 1,317 | — |
Agentic & Tool Use Not comparable
GLM-5.3: 36.4 (#38), Mercury: —
| Benchmark | GLM-5.3 | Mercury |
|---|---|---|
| APEX-Agents | 56.6% | — |
| Vending-Bench 2 | 8,164 | — |
Reasoning GLM-5.3 leads
GLM-5.3: 46.1 (#46), Mercury: 17.5 (#293)
| Benchmark | GLM-5.3 | Mercury |
|---|---|---|
| LMArena Hard Prompts | 1489 | 1285 |
| Kagi LLM Benchmark | — | 21.6% |
| NYT Connections (extended) | 74.2% | — |
| CritPt | 19.1% | — |
| Chess Puzzles | 21% | — |
| Mystery Game Puzzles | 33% | — |
| DTBench | 87.7% | — |
| LMCA | 55.5% | — |
| Bench to the Future 3 | 0.15 | — |
| Epoch Capabilities Index | 155.61 | — |
Math Not comparable
GLM-5.3: 62.3 (#33), Mercury: —
| Benchmark | GLM-5.3 | Mercury |
|---|---|---|
| FrontierMath (Tiers 1-3) | 68.8% | — |
| FrontierMath Tier 4 | 29.3% | — |
| OTIS Mock AIME 2024-2025 | 91.1% | — |
| ProofBench | 49% | — |
| LMArena Math | 1489 | — |
Knowledge Not comparable
GLM-5.3: 58.3 (#37), Mercury: —
| Benchmark | GLM-5.3 | Mercury |
|---|---|---|
| GPQA Diamond | 90.9% | — |
| SimpleQA Verified | 41% | — |
| LMArena Expert | 1516 | — |
Multilingual GLM-5.3 leads
GLM-5.3: 55.7 (#28), Mercury: 41.6 (#206)
| Benchmark | GLM-5.3 | Mercury |
|---|---|---|
| LMArena Non-English | 1457 | 1260 |
| LMArena Chinese | 1528 | — |
| LMArena French | 1499 | — |
| LMArena German | 1499 | — |
| LMArena Japanese | 1453 | — |
| LMArena Korean | 1472 | — |
| LMArena Russian | 1463 | — |
| LMArena Spanish | 1460 | — |
Instruction Following GLM-5.3 leads
GLM-5.3: 77.5 (#23), Mercury: 65.2 (#224)
| Benchmark | GLM-5.3 | Mercury |
|---|---|---|
| LMArena Instruction Following | 1477 | 1239 |
Long Context GLM-5.3 leads
GLM-5.3: 45.4 (#41), Mercury: 38.4 (#198)
| Benchmark | GLM-5.3 | Mercury |
|---|---|---|
| LMArena Longer Query | 1482 | 1266 |
Writing & Preference GLM-5.3 leads
GLM-5.3: 75.7 (#6), Mercury: 46.2 (#221)
| Benchmark | GLM-5.3 | Mercury |
|---|---|---|
| LMArena Text | 1471 | 1282 |
| LMArena Creative Writing | 1457 | 1191 |
| LMArena Multi-Turn | 1472 | 1282 |
| EQ-Bench Creative Writing | 2075 | — |
Frequently asked questions
Is GLM-5.3 better than Mercury?
GLM-5.3 is the stronger model overall, scoring 54.8 to 37.6 on the Noometry Index.
Is GLM-5.3 or Mercury better for coding?
GLM-5.3 scores higher on coding benchmarks: 59.5 versus 38.7 in the Noometry coding category.
How many benchmarks do GLM-5.3 and Mercury share?
8 benchmarks have published results for both models. GLM-5.3 has 42 scored results on Noometry and Mercury has 9.