Model comparison
Gemini 3.8 Flash vs Kimi K2 Thinking Turbo
Gemini 3.8 Flash is the stronger model overall, scoring 61.8 to 45.8 on the Noometry Index.
Last verified . 21 shared benchmarks.
GoogleSummary
- They share 21 benchmarks with published results for both. Gemini 3.8 Flash scores higher in 8 categories and Kimi K2 Thinking Turbo in 0 categories; 8 gaps are clear of the uncertainty.
- The widest gap is in reasoning, where Gemini 3.8 Flash leads 76.9 to 32.5.
- The biggest single-benchmark swing is Chess Puzzles: 61% for Gemini 3.8 Flash and 20% for Kimi K2 Thinking Turbo.
- Kimi K2 Thinking Turbo has downloadable open weights; the other is API-only.
Side by side
| Gemini 3.8 Flash | Kimi K2 Thinking Turbo | |
|---|---|---|
| Provider | Moonshot AI | |
| Noometry Index | 61.8 | 45.8 |
| Released | 2026-09-02 | 2025-11-06 |
| Weights | Proprietary | Open |
| Context window | 1.05M | — |
| Max output | 66K | — |
| Input $ / M tokens | $0.75 | — |
| Output $ / M tokens | $3.75 | — |
| Results tracked | 50 | 21 |
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Category by category
Coding Gemini 3.8 Flash leads
Gemini 3.8 Flash: 59.2 (#15), Kimi K2 Thinking Turbo: 38.4 (#178)
| Benchmark | Gemini 3.8 Flash | Kimi K2 Thinking Turbo |
|---|---|---|
| LMArena WebDev | 1584 | 1322 |
| LMArena Coding | 1510 | 1454 |
| DeepSWE | 73.8% | — |
| FrontierCode | 41.2% | — |
| CursorBench | 39.6% | — |
| FrontierSWE | 19.6% | — |
| SciCode | 56.6% | — |
| WeirdML | 84.8% | — |
| ALE-Bench | 1,270 | — |
Agentic & Tool Use Not comparable
Gemini 3.8 Flash: 41.8 (#21), Kimi K2 Thinking Turbo: —
| Benchmark | Gemini 3.8 Flash | Kimi K2 Thinking Turbo |
|---|---|---|
| APEX-Agents | 64.3% | — |
| Remote Labor Index | 5.8% | — |
| GDP.pdf | 23.4% | — |
| Vending-Bench 2 | 5,094 | — |
Reasoning Gemini 3.8 Flash leads
Gemini 3.8 Flash: 76.9 (#5), Kimi K2 Thinking Turbo: 32.5 (#75)
| Benchmark | Gemini 3.8 Flash | Kimi K2 Thinking Turbo |
|---|---|---|
| Chess Puzzles | 61% | 20% |
| LMArena Hard Prompts | 1508 | 1428 |
| ARC-AGI-2 | 89.2% | — |
| NYT Connections (extended) | 97.4% | — |
| ARC-AGI-1 | 98.5% | — |
| CritPt | 18.3% | — |
| Mystery Game Puzzles | 47% | — |
| DTBench | 95.7% | — |
| LMCA | 52.9% | — |
| Surface Evolver Bench | 76.9% | — |
| Epoch Capabilities Index | 156.71 | — |
Math Gemini 3.8 Flash leads
Gemini 3.8 Flash: 65.3 (#28), Kimi K2 Thinking Turbo: 47.4 (#68)
| Benchmark | Gemini 3.8 Flash | Kimi K2 Thinking Turbo |
|---|---|---|
| OTIS Mock AIME 2024-2025 | 98.9% | 83.1% |
| LMArena Math | 1528 | 1429 |
| FrontierMath (Tiers 1-3) | 68.4% | — |
| FrontierMath Tier 4 | 22% | — |
| ProofBench | 48% | — |
Knowledge Gemini 3.8 Flash leads
Gemini 3.8 Flash: 74.8 (#2), Kimi K2 Thinking Turbo: 50.9 (#69)
| Benchmark | Gemini 3.8 Flash | Kimi K2 Thinking Turbo |
|---|---|---|
| GPQA Diamond | 95.4% | 84.2% |
| LMArena Expert | 1524 | 1439 |
| Humanity's Last Exam | 44.5% | — |
| SimpleQA Verified | 69.7% | — |
Multimodal Not comparable
Gemini 3.8 Flash: 40.7 (#45), Kimi K2 Thinking Turbo: —
| Benchmark | Gemini 3.8 Flash | Kimi K2 Thinking Turbo |
|---|---|---|
| LMArena Vision | 1314 | — |
| Blueprint-Bench 2 | 38.6% | — |
| Furniture Assembly | 31.7% | — |
Multilingual Gemini 3.8 Flash leads
Gemini 3.8 Flash: 58.0 (#5), Kimi K2 Thinking Turbo: 51.4 (#109)
| Benchmark | Gemini 3.8 Flash | Kimi K2 Thinking Turbo |
|---|---|---|
| LMArena Non-English | 1491 | 1398 |
| LMArena Chinese | 1554 | 1456 |
| LMArena French | 1498 | 1425 |
| LMArena German | 1493 | 1390 |
| LMArena Japanese | 1502 | 1357 |
| LMArena Korean | 1459 | 1330 |
| LMArena Russian | 1515 | 1391 |
| LMArena Spanish | 1485 | 1406 |
Instruction Following Gemini 3.8 Flash leads
Gemini 3.8 Flash: 78.0 (#13), Kimi K2 Thinking Turbo: 74.0 (#109)
| Benchmark | Gemini 3.8 Flash | Kimi K2 Thinking Turbo |
|---|---|---|
| LMArena Instruction Following | 1490 | 1403 |
Long Context Gemini 3.8 Flash leads
Gemini 3.8 Flash: 46.3 (#24), Kimi K2 Thinking Turbo: 43.2 (#102)
| Benchmark | Gemini 3.8 Flash | Kimi K2 Thinking Turbo |
|---|---|---|
| LMArena Longer Query | 1508 | 1415 |
Writing & Preference Gemini 3.8 Flash leads
Gemini 3.8 Flash: 72.2 (#15), Kimi K2 Thinking Turbo: 60.0 (#104)
| Benchmark | Gemini 3.8 Flash | Kimi K2 Thinking Turbo |
|---|---|---|
| LMArena Text | 1499 | 1415 |
| LMArena Creative Writing | 1492 | 1374 |
| LMArena Multi-Turn | 1501 | 1414 |
| EQ-Bench Creative Writing | 1748 | — |
Frequently asked questions
Is Gemini 3.8 Flash better than Kimi K2 Thinking Turbo?
Gemini 3.8 Flash is the stronger model overall, scoring 61.8 to 45.8 on the Noometry Index.
Is Gemini 3.8 Flash or Kimi K2 Thinking Turbo better for coding?
Gemini 3.8 Flash scores higher on coding benchmarks: 59.2 versus 38.4 in the Noometry coding category.
How many benchmarks do Gemini 3.8 Flash and Kimi K2 Thinking Turbo share?
21 benchmarks have published results for both models. Gemini 3.8 Flash has 50 scored results on Noometry and Kimi K2 Thinking Turbo has 21.