Model comparison
GPT-5 Pro vs Muse Glimmer
GPT-5 Pro is the stronger model overall, scoring 46.4 to 41.7 on the Noometry Index.
Last verified . 0 shared benchmarks.
MetaSummary
- The widest gap is in knowledge, where GPT-5 Pro leads 56.7 to 38.5.
- Muse Glimmer has downloadable open weights; the other is API-only.
Side by side
| GPT-5 Pro | Muse Glimmer | |
|---|---|---|
| Provider | OpenAI | Meta |
| Noometry Index | 46.4 | 41.7 |
| Released | 2025-10-06 | 2026-08-10 |
| Weights | Proprietary | Open |
| Context window | 400K | — |
| Max output | 272K | — |
| Input $ / M tokens | $15 | — |
| Output $ / M tokens | $120 | — |
| Results tracked | 12 | 15 |
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Category by category
Coding GPT-5 Pro leads
GPT-5 Pro: 44.0 (#80), Muse Glimmer: 40.4 (#142)
| Benchmark | GPT-5 Pro | Muse Glimmer |
|---|---|---|
| LMArena WebDev | — | 1355 |
| SciCode | — | 44.9% |
| WeirdML | 60.4% | — |
| LMArena Coding | — | 1416 |
| AlgoTune | 1.31 | — |
Reasoning GPT-5 Pro leads
GPT-5 Pro: 38.9 (#62), Muse Glimmer: 25.7 (#144)
| Benchmark | GPT-5 Pro | Muse Glimmer |
|---|---|---|
| ARC-AGI-2 | 18.3% | — |
| SimpleBench | 61.6% | — |
| Kagi LLM Benchmark | 76.8% | — |
| ARC-AGI-1 | 70.2% | — |
| CritPt | — | 2.6% |
| EnigmaEval | 18.8% | — |
| LMArena Hard Prompts | — | 1396 |
| Epoch Capabilities Index | 150.28 | — |
Math GPT-5 Pro leads
GPT-5 Pro: 48.5 (#63), Muse Glimmer: 38.8 (#125)
| Benchmark | GPT-5 Pro | Muse Glimmer |
|---|---|---|
| FrontierMath (Tiers 1-3) | 55.8% | — |
| FrontierMath Tier 4 | 19.5% | — |
| LMArena Math | — | 1417 |
| FrontierMath Tier 4 (v1) | 14.6% | — |
Knowledge GPT-5 Pro leads
GPT-5 Pro: 56.7 (#42), Muse Glimmer: 38.5 (#143)
| Benchmark | GPT-5 Pro | Muse Glimmer |
|---|---|---|
| Humanity's Last Exam | 31.6% | — |
| LMArena Expert | — | 1386 |
Multilingual Not comparable
GPT-5 Pro: —, Muse Glimmer: 50.5 (#122)
| Benchmark | GPT-5 Pro | Muse Glimmer |
|---|---|---|
| LMArena Non-English | — | 1384 |
| LMArena Chinese | — | 1412 |
| LMArena Russian | — | 1390 |
Instruction Following Not comparable
GPT-5 Pro: —, Muse Glimmer: 72.6 (#135)
| Benchmark | GPT-5 Pro | Muse Glimmer |
|---|---|---|
| LMArena Instruction Following | — | 1375 |
Long Context Not comparable
GPT-5 Pro: —, Muse Glimmer: 42.1 (#129)
| Benchmark | GPT-5 Pro | Muse Glimmer |
|---|---|---|
| LMArena Longer Query | — | 1382 |
Writing & Preference Not comparable
GPT-5 Pro: —, Muse Glimmer: 57.5 (#126)
| Benchmark | GPT-5 Pro | Muse Glimmer |
|---|---|---|
| LMArena Text | — | 1389 |
| LMArena Creative Writing | — | 1339 |
| LMArena Multi-Turn | — | 1399 |
Frequently asked questions
Is GPT-5 Pro better than Muse Glimmer?
GPT-5 Pro is the stronger model overall, scoring 46.4 to 41.7 on the Noometry Index.
Is GPT-5 Pro or Muse Glimmer better for coding?
GPT-5 Pro scores higher on coding benchmarks: 44.0 versus 40.4 in the Noometry coding category.
How many benchmarks do GPT-5 Pro and Muse Glimmer share?
0 benchmarks have published results for both models. GPT-5 Pro has 12 scored results on Noometry and Muse Glimmer has 15.