Model comparison
Inkling vs Yi-Lightning
Inkling is the stronger model overall, scoring 44.1 to 36.5 on the Noometry Index.
Last verified . 17 shared benchmarks.
Summary
- They share 17 benchmarks with published results for both. Inkling scores higher in 7 categories and Yi-Lightning in 1 category; 8 gaps are clear of the uncertainty.
- The widest gap is in knowledge, where Inkling leads 55.2 to 34.8.
- Inkling has downloadable open weights; the other is API-only.
Side by side
| Inkling | Yi-Lightning | |
|---|---|---|
| Provider | Thinking Machines Lab | 01.AI |
| Noometry Index | 44.1 | 36.5 |
| Released | 2026-07-15 | 2024-12-02 |
| Weights | Open | Proprietary |
| Context window | 66K | — |
| Max output | 66K | — |
| Input $ / M tokens | $1.87 | — |
| Output $ / M tokens | $4.68 | — |
| Results tracked | 41 | 18 |
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Category by category
Coding Inkling leads
Inkling: 34.1 (#229), Yi-Lightning: 27.0 (#315)
| Benchmark | Inkling | Yi-Lightning |
|---|---|---|
| LMArena Coding | 1463 | 1313 |
| FrontierCode | 14% | — |
| Aider Polyglot | — | 12.9% |
| LMArena WebDev | 1412 | — |
| FrontierSWE | 4.1% | — |
| SciCode | 47% | — |
| WeirdML | 32.3% | — |
| ALE-Bench | 946 | — |
Agentic & Tool Use Not comparable
Inkling: 29.5 (#76), Yi-Lightning: —
| Benchmark | Inkling | Yi-Lightning |
|---|---|---|
| APEX-Agents | 33.8% | — |
| τ²-bench Banking | 25% | — |
Reasoning Inkling leads
Inkling: 40.6 (#48), Yi-Lightning: 24.9 (#137)
| Benchmark | Inkling | Yi-Lightning |
|---|---|---|
| LMArena Hard Prompts | 1452 | 1302 |
| ARC-AGI-2 | 36.5% | — |
| SimpleBench | 50% | — |
| ARC-AGI-1 | 79.5% | — |
| CritPt | 5.4% | — |
| Chess Puzzles | 21% | — |
| DTBench | 87.5% | — |
| LMCA | 37.6% | — |
| Epoch Capabilities Index | 148.6 | — |
Math Yi-Lightning leads
Inkling: 31.2 (#198), Yi-Lightning: 33.5 (#173)
| Benchmark | Inkling | Yi-Lightning |
|---|---|---|
| LMArena Math | 1482 | 1300 |
| FrontierMath (Tiers 1-3) | 33.3% | — |
| FrontierMath Tier 4 | 4.9% | — |
| OTIS Mock AIME 2024-2025 | 88.9% | — |
| ProofBench | 0% | — |
Knowledge Inkling leads
Inkling: 55.2 (#44), Yi-Lightning: 34.8 (#182)
| Benchmark | Inkling | Yi-Lightning |
|---|---|---|
| LMArena Expert | 1468 | 1286 |
| GPQA Diamond | 88.3% | — |
| SimpleQA Verified | 40.3% | — |
Multilingual Inkling leads
Inkling: 54.2 (#49), Yi-Lightning: 42.4 (#191)
| Benchmark | Inkling | Yi-Lightning |
|---|---|---|
| LMArena Non-English | 1434 | 1269 |
| LMArena Chinese | 1495 | 1320 |
| LMArena French | 1453 | 1304 |
| LMArena German | 1456 | 1267 |
| LMArena Japanese | 1428 | 1228 |
| LMArena Korean | 1401 | 1192 |
| LMArena Russian | 1430 | 1255 |
| LMArena Spanish | 1442 | 1315 |
Instruction Following Inkling leads
Inkling: 75.3 (#65), Yi-Lightning: 67.6 (#191)
| Benchmark | Inkling | Yi-Lightning |
|---|---|---|
| LMArena Instruction Following | 1427 | 1278 |
Long Context Inkling leads
Inkling: 43.9 (#79), Yi-Lightning: 39.4 (#176)
| Benchmark | Inkling | Yi-Lightning |
|---|---|---|
| LMArena Longer Query | 1436 | 1297 |
Writing & Preference Inkling leads
Inkling: 65.5 (#48), Yi-Lightning: 50.4 (#178)
| Benchmark | Inkling | Yi-Lightning |
|---|---|---|
| LMArena Text | 1443 | 1302 |
| LMArena Creative Writing | 1390 | 1280 |
| LMArena Multi-Turn | 1436 | 1311 |
| EQ-Bench Creative Writing | 1611 | — |
| EQ-Bench 4 | 1226 | — |
Frequently asked questions
Is Inkling better than Yi-Lightning?
Inkling is the stronger model overall, scoring 44.1 to 36.5 on the Noometry Index.
Is Inkling or Yi-Lightning better for coding?
Inkling scores higher on coding benchmarks: 34.1 versus 27.0 in the Noometry coding category.
How many benchmarks do Inkling and Yi-Lightning share?
17 benchmarks have published results for both models. Inkling has 41 scored results on Noometry and Yi-Lightning has 18.