Model comparison
Kimi K2 Thinking Turbo vs Mercury 2.5
Kimi K2 Thinking Turbo has enough public results to be ranked (#63); Mercury 2.5 does not yet, so treat this comparison as directional.
Last verified . 0 shared benchmarks.
Summary
- The widest gap is in math, where Kimi K2 Thinking Turbo leads 45.5 to 22.4.
- Kimi K2 Thinking Turbo has downloadable open weights; the other is API-only.
Side by side
| Kimi K2 Thinking Turbo | Mercury 2.5 | |
|---|---|---|
| Provider | Moonshot AI | Inception |
| Noometry Index | 45.4 | 30.2 |
| Released | 2025-11-06 | 2026-09-08 |
| Weights | Open | Proprietary |
| Context window | — | 260K |
| Max output | — | 66K |
| Input $ / M tokens | — | $0.04 |
| Output $ / M tokens | — | $0.15 |
| Results tracked | 21 | 2 |
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Category by category
Coding Not comparable
Kimi K2 Thinking Turbo: 38.1 (#166), Mercury 2.5: —
| Benchmark | Kimi K2 Thinking Turbo | Mercury 2.5 |
|---|---|---|
| LMArena WebDev | 1322 | — |
| LMArena Coding | 1454 | — |
| ALE-Bench | — | 301.65 |
Reasoning Not comparable
Kimi K2 Thinking Turbo: 31.4 (#72), Mercury 2.5: —
| Benchmark | Kimi K2 Thinking Turbo | Mercury 2.5 |
|---|---|---|
| Chess Puzzles | 20% | — |
| LMArena Hard Prompts | 1428 | — |
Math Kimi K2 Thinking Turbo leads
Kimi K2 Thinking Turbo: 45.5 (#62), Mercury 2.5: 22.4
| Benchmark | Kimi K2 Thinking Turbo | Mercury 2.5 |
|---|---|---|
| OTIS Mock AIME 2024-2025 | 83.1% | — |
| ProofBench | — | 3% |
| LMArena Math | 1429 | — |
Knowledge Not comparable
Kimi K2 Thinking Turbo: 50.9 (#64), Mercury 2.5: —
| Benchmark | Kimi K2 Thinking Turbo | Mercury 2.5 |
|---|---|---|
| GPQA Diamond | 84.2% | — |
| LMArena Expert | 1439 | — |
Multilingual Not comparable
Kimi K2 Thinking Turbo: 51.6 (#104), Mercury 2.5: —
| Benchmark | Kimi K2 Thinking Turbo | Mercury 2.5 |
|---|---|---|
| LMArena Non-English | 1398 | — |
| LMArena Chinese | 1457 | — |
| LMArena French | 1425 | — |
| LMArena German | 1390 | — |
| LMArena Japanese | 1356 | — |
| LMArena Korean | 1329 | — |
| LMArena Russian | 1390 | — |
| LMArena Spanish | 1407 | — |
Instruction Following Not comparable
Kimi K2 Thinking Turbo: 74.2 (#103), Mercury 2.5: —
| Benchmark | Kimi K2 Thinking Turbo | Mercury 2.5 |
|---|---|---|
| LMArena Instruction Following | 1403 | — |
Long Context Not comparable
Kimi K2 Thinking Turbo: 43.2 (#99), Mercury 2.5: —
| Benchmark | Kimi K2 Thinking Turbo | Mercury 2.5 |
|---|---|---|
| LMArena Longer Query | 1415 | — |
Writing & Preference Not comparable
Kimi K2 Thinking Turbo: 60.2 (#99), Mercury 2.5: —
| Benchmark | Kimi K2 Thinking Turbo | Mercury 2.5 |
|---|---|---|
| LMArena Text | 1415 | — |
| LMArena Creative Writing | 1373 | — |
| LMArena Multi-Turn | 1414 | — |
Frequently asked questions
Is Kimi K2 Thinking Turbo better than Mercury 2.5?
Kimi K2 Thinking Turbo has enough public results to be ranked (#63); Mercury 2.5 does not yet, so treat this comparison as directional.
How many benchmarks do Kimi K2 Thinking Turbo and Mercury 2.5 share?
0 benchmarks have published results for both models. Kimi K2 Thinking Turbo has 21 scored results on Noometry and Mercury 2.5 has 2.