Model comparison
GPT-6.1 Sol vs Muse Glimmer
GPT-6.1 Sol is the stronger model overall, scoring 65.6 to 41.7 on the Noometry Index.
Last verified . 15 shared benchmarks.
MetaSummary
- They share 15 benchmarks with published results for both. GPT-6.1 Sol scores higher in 8 categories and Muse Glimmer in 0 categories; 8 gaps are clear of the uncertainty.
- The widest gap is in reasoning, where GPT-6.1 Sol leads 81.9 to 25.7.
- The biggest single-benchmark swing is CritPt: 31.7% for GPT-6.1 Sol and 2.6% for Muse Glimmer.
- Muse Glimmer has downloadable open weights; the other is API-only.
Side by side
| GPT-6.1 Sol | Muse Glimmer | |
|---|---|---|
| Provider | OpenAI | Meta |
| Noometry Index | 65.6 | 41.7 |
| Released | 2026-09-29 | 2026-08-10 |
| Weights | Proprietary | Open |
| Context window | 1.05M | — |
| Max output | 128K | — |
| Input $ / M tokens | $2 | — |
| Output $ / M tokens | $10 | — |
| Results tracked | 34 | 15 |
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Category by category
Coding GPT-6.1 Sol leads
GPT-6.1 Sol: 63.2 (#8), Muse Glimmer: 40.4 (#142)
| Benchmark | GPT-6.1 Sol | Muse Glimmer |
|---|---|---|
| LMArena WebDev | 1755 | 1355 |
| SciCode | 55.8% | 44.9% |
| LMArena Coding | 1487 | 1416 |
| DeepSWE | 75.2% | — |
| FrontierCode | 50.2% | — |
Agentic & Tool Use Not comparable
GPT-6.1 Sol: 39.6 (#26), Muse Glimmer: —
| Benchmark | GPT-6.1 Sol | Muse Glimmer |
|---|---|---|
| APEX-Agents | 60% | — |
| GDP.pdf | 32% | — |
Reasoning GPT-6.1 Sol leads
GPT-6.1 Sol: 81.9 (#2), Muse Glimmer: 25.7 (#144)
| Benchmark | GPT-6.1 Sol | Muse Glimmer |
|---|---|---|
| CritPt | 31.7% | 2.6% |
| LMArena Hard Prompts | 1466 | 1396 |
| ARC-AGI-2 | 94.2% | — |
| NYT Connections (extended) | 95.5% | — |
| ARC-AGI-1 | 98.5% | — |
| Chess Puzzles | 61% | — |
| EBR-Bench | 54.3% | — |
| Mystery Game Puzzles | 80% | — |
| Epoch Capabilities Index | 166.09 | — |
Math GPT-6.1 Sol leads
GPT-6.1 Sol: 93.7 (#1), Muse Glimmer: 38.8 (#125)
| Benchmark | GPT-6.1 Sol | Muse Glimmer |
|---|---|---|
| LMArena Math | 1464 | 1417 |
| FrontierMath (Tiers 1-3) | 93.7% | — |
| FrontierMath Tier 4 | 100% | — |
| OTIS Mock AIME 2024-2025 | 100% | — |
| ProofBench | 99% | — |
Knowledge GPT-6.1 Sol leads
GPT-6.1 Sol: 71.8 (#4), Muse Glimmer: 38.5 (#143)
| Benchmark | GPT-6.1 Sol | Muse Glimmer |
|---|---|---|
| LMArena Expert | 1502 | 1386 |
| GPQA Diamond | 95.4% | — |
| SimpleQA Verified | 73.9% | — |
Multimodal Not comparable
GPT-6.1 Sol: 52.7 (#5), Muse Glimmer: —
| Benchmark | GPT-6.1 Sol | Muse Glimmer |
|---|---|---|
| LMArena Vision | 1288 | — |
| Furniture Assembly | 80% | — |
Multilingual GPT-6.1 Sol leads
GPT-6.1 Sol: 54.3 (#46), Muse Glimmer: 50.5 (#122)
| Benchmark | GPT-6.1 Sol | Muse Glimmer |
|---|---|---|
| LMArena Non-English | 1438 | 1384 |
| LMArena Chinese | 1477 | 1412 |
| LMArena Russian | 1455 | 1390 |
Instruction Following GPT-6.1 Sol leads
GPT-6.1 Sol: 77.0 (#29), Muse Glimmer: 72.6 (#135)
| Benchmark | GPT-6.1 Sol | Muse Glimmer |
|---|---|---|
| LMArena Instruction Following | 1468 | 1375 |
Long Context GPT-6.1 Sol leads
GPT-6.1 Sol: 44.9 (#54), Muse Glimmer: 42.1 (#129)
| Benchmark | GPT-6.1 Sol | Muse Glimmer |
|---|---|---|
| LMArena Longer Query | 1465 | 1382 |
Writing & Preference GPT-6.1 Sol leads
GPT-6.1 Sol: 63.6 (#63), Muse Glimmer: 57.5 (#126)
| Benchmark | GPT-6.1 Sol | Muse Glimmer |
|---|---|---|
| LMArena Text | 1447 | 1389 |
| LMArena Creative Writing | 1432 | 1339 |
| LMArena Multi-Turn | 1449 | 1399 |
Frequently asked questions
Is GPT-6.1 Sol better than Muse Glimmer?
GPT-6.1 Sol is the stronger model overall, scoring 65.6 to 41.7 on the Noometry Index.
Is GPT-6.1 Sol or Muse Glimmer better for coding?
GPT-6.1 Sol scores higher on coding benchmarks: 63.2 versus 40.4 in the Noometry coding category.
How many benchmarks do GPT-6.1 Sol and Muse Glimmer share?
15 benchmarks have published results for both models. GPT-6.1 Sol has 34 scored results on Noometry and Muse Glimmer has 15.