Model comparison
Grok 4.5 vs Yi-Lightning
Grok 4.5 is the stronger model overall, scoring 55.0 to 37.1 on the Noometry Index.
Last verified . 17 shared benchmarks.
Summary
- They share 17 benchmarks with published results for both. Grok 4.5 scores higher in 8 categories and Yi-Lightning in 0 categories; 8 gaps are clear of the uncertainty.
- The widest gap is in reasoning, where Grok 4.5 leads 56.1 to 25.9.
Side by side
| Grok 4.5 | Yi-Lightning | |
|---|---|---|
| Provider | xAI | 01.AI |
| Noometry Index | 55.0 | 37.1 |
| Released | 2026-07-08 | 2024-12-02 |
| Weights | Proprietary | Proprietary |
| Context window | 500K | — |
| Max output | 500K | — |
| Input $ / M tokens | $2 | — |
| Output $ / M tokens | $6 | — |
| Results tracked | 52 | 18 |
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Category by category
Coding Grok 4.5 leads
Grok 4.5: 52.2 (#35), Yi-Lightning: 27.4 (#320)
| Benchmark | Grok 4.5 | Yi-Lightning |
|---|---|---|
| LMArena Coding | 1474 | 1312 |
| DeepSWE | 53.8% | — |
| FrontierCode | 42.4% | — |
| Aider Polyglot | — | 12.9% |
| LMArena WebDev | 1553 | — |
| SciCode | 54.1% | — |
| WeirdML | 46.4% | — |
| ALE-Bench | 1,309 | — |
Agentic & Tool Use Not comparable
Grok 4.5: 44.4 (#17), Yi-Lightning: —
| Benchmark | Grok 4.5 | Yi-Lightning |
|---|---|---|
| APEX-Agents | 56.2% | — |
| τ²-bench Banking | 47.9% | — |
| PostTrainBench | 23.4% | — |
| GBAEval | 65.4% | — |
| GDP.pdf | 14% | — |
| LMArena Search | 1213 | — |
| Vending-Bench 2 | 3,887 | — |
Reasoning Grok 4.5 leads
Grok 4.5: 56.1 (#25), Yi-Lightning: 25.9 (#139)
| Benchmark | Grok 4.5 | Yi-Lightning |
|---|---|---|
| LMArena Hard Prompts | 1462 | 1302 |
| ARC-AGI-2 | 52.6% | — |
| SimpleBench | 70% | — |
| Kagi LLM Benchmark | 83.5% | — |
| NYT Connections (extended) | 79.9% | — |
| ARC-AGI-1 | 87.2% | — |
| CritPt | 15.4% | — |
| Chess Puzzles | 36% | — |
| DTBench | 96.5% | — |
| LMCA | 45.2% | — |
| Surface Evolver Bench | 74.4% | — |
| Epoch Capabilities Index | 153.92 | — |
Math Grok 4.5 leads
Grok 4.5: 60.9 (#35), Yi-Lightning: 36.2 (#172)
| Benchmark | Grok 4.5 | Yi-Lightning |
|---|---|---|
| LMArena Math | 1459 | 1300 |
| FrontierMath (Tiers 1-3) | 57.2% | — |
| FrontierMath Tier 4 | 24.4% | — |
| OTIS Mock AIME 2024-2025 | 97.8% | — |
| ProofBench | 31% | — |
Knowledge Grok 4.5 leads
Grok 4.5: 62.3 (#24), Yi-Lightning: 35.4 (#185)
| Benchmark | Grok 4.5 | Yi-Lightning |
|---|---|---|
| LMArena Expert | 1466 | 1286 |
| GPQA Diamond | 93.4% | — |
| SimpleQA Verified | 48.3% | — |
Multimodal Not comparable
Grok 4.5: 37.6 (#72), Yi-Lightning: —
| Benchmark | Grok 4.5 | Yi-Lightning |
|---|---|---|
| LMArena Vision | 1288 | — |
| Blueprint-Bench 2 | 27.3% | — |
| Furniture Assembly | 22.5% | — |
| LMArena Document | 1452 | — |
Multilingual Grok 4.5 leads
Grok 4.5: 54.4 (#42), Yi-Lightning: 42.2 (#196)
| Benchmark | Grok 4.5 | Yi-Lightning |
|---|---|---|
| LMArena Non-English | 1440 | 1269 |
| LMArena Chinese | 1496 | 1320 |
| LMArena French | 1456 | 1305 |
| LMArena German | 1446 | 1267 |
| LMArena Japanese | 1428 | 1228 |
| LMArena Korean | 1404 | 1192 |
| LMArena Russian | 1448 | 1255 |
| LMArena Spanish | 1450 | 1315 |
Instruction Following Grok 4.5 leads
Grok 4.5: 76.0 (#48), Yi-Lightning: 67.4 (#196)
| Benchmark | Grok 4.5 | Yi-Lightning |
|---|---|---|
| LMArena Instruction Following | 1446 | 1278 |
Long Context Grok 4.5 leads
Grok 4.5: 44.8 (#56), Yi-Lightning: 39.4 (#181)
| Benchmark | Grok 4.5 | Yi-Lightning |
|---|---|---|
| LMArena Longer Query | 1463 | 1297 |
Writing & Preference Grok 4.5 leads
Grok 4.5: 65.8 (#42), Yi-Lightning: 50.2 (#184)
| Benchmark | Grok 4.5 | Yi-Lightning |
|---|---|---|
| LMArena Text | 1448 | 1302 |
| LMArena Creative Writing | 1442 | 1280 |
| LMArena Multi-Turn | 1456 | 1311 |
| EQ-Bench Creative Writing | 1579 | — |
Frequently asked questions
Is Grok 4.5 better than Yi-Lightning?
Grok 4.5 is the stronger model overall, scoring 55.0 to 37.1 on the Noometry Index.
Is Grok 4.5 or Yi-Lightning better for coding?
Grok 4.5 scores higher on coding benchmarks: 52.2 versus 27.4 in the Noometry coding category.
How many benchmarks do Grok 4.5 and Yi-Lightning share?
17 benchmarks have published results for both models. Grok 4.5 has 52 scored results on Noometry and Yi-Lightning has 18.