Model comparison
Mercury 2.5 vs Muse Glimmer
Muse Glimmer is the stronger model overall, scoring 41.7 to 33.5 on the Noometry Index.
Last verified . 2 shared benchmarks.
MetaSummary
- They share 2 benchmarks with published results for both. Mercury 2.5 scores higher in 0 categories and Muse Glimmer in 3 categories; 2 gaps are clear of the uncertainty.
- The widest gap is in math, where Muse Glimmer leads 38.8 to 23.3.
- The biggest single-benchmark swing is SciCode: 38.5% for Mercury 2.5 and 44.9% for Muse Glimmer.
- Muse Glimmer has downloadable open weights; the other is API-only.
Side by side
| Mercury 2.5 | Muse Glimmer | |
|---|---|---|
| Provider | Inception | Meta |
| Noometry Index | 33.5 | 41.7 |
| Released | 2026-09-08 | 2026-08-10 |
| Weights | Proprietary | Open |
| Context window | 260K | — |
| Max output | 66K | — |
| Input $ / M tokens | $0.04 | — |
| Output $ / M tokens | $0.15 | — |
| Results tracked | 4 | 15 |
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Category by category
Coding Too close to call
Mercury 2.5: 39.5 (#156), Muse Glimmer: 40.4 (#142)
| Benchmark | Mercury 2.5 | Muse Glimmer |
|---|---|---|
| SciCode | 38.5% | 44.9% |
| LMArena WebDev | — | 1355 |
| LMArena Coding | — | 1416 |
| ALE-Bench | 301.65 | — |
Reasoning Muse Glimmer leads
Mercury 2.5: 22.4 (#193), Muse Glimmer: 25.7 (#144)
| Benchmark | Mercury 2.5 | Muse Glimmer |
|---|---|---|
| CritPt | 0% | 2.6% |
| LMArena Hard Prompts | — | 1396 |
Math Muse Glimmer leads
Mercury 2.5: 23.3 (#272), Muse Glimmer: 38.8 (#125)
| Benchmark | Mercury 2.5 | Muse Glimmer |
|---|---|---|
| ProofBench | 3% | — |
| LMArena Math | — | 1417 |
Knowledge Not comparable
Mercury 2.5: —, Muse Glimmer: 38.5 (#143)
| Benchmark | Mercury 2.5 | Muse Glimmer |
|---|---|---|
| LMArena Expert | — | 1386 |
Multilingual Not comparable
Mercury 2.5: —, Muse Glimmer: 50.5 (#122)
| Benchmark | Mercury 2.5 | Muse Glimmer |
|---|---|---|
| LMArena Non-English | — | 1384 |
| LMArena Chinese | — | 1412 |
| LMArena Russian | — | 1390 |
Instruction Following Not comparable
Mercury 2.5: —, Muse Glimmer: 72.6 (#135)
| Benchmark | Mercury 2.5 | Muse Glimmer |
|---|---|---|
| LMArena Instruction Following | — | 1375 |
Long Context Not comparable
Mercury 2.5: —, Muse Glimmer: 42.1 (#129)
| Benchmark | Mercury 2.5 | Muse Glimmer |
|---|---|---|
| LMArena Longer Query | — | 1382 |
Writing & Preference Not comparable
Mercury 2.5: —, Muse Glimmer: 57.5 (#126)
| Benchmark | Mercury 2.5 | Muse Glimmer |
|---|---|---|
| LMArena Text | — | 1389 |
| LMArena Creative Writing | — | 1339 |
| LMArena Multi-Turn | — | 1399 |
Frequently asked questions
Is Mercury 2.5 better than Muse Glimmer?
Muse Glimmer is the stronger model overall, scoring 41.7 to 33.5 on the Noometry Index.
Is Mercury 2.5 or Muse Glimmer better for coding?
They score almost the same on coding (39.5 vs 40.4); test both on your own repository before choosing.
How many benchmarks do Mercury 2.5 and Muse Glimmer share?
2 benchmarks have published results for both models. Mercury 2.5 has 4 scored results on Noometry and Muse Glimmer has 15.