# Inkling vs Kimi K2.5

> Kimi K2.5 is the stronger model overall, scoring 48.1 to 44.1 on the Noometry Index.

- Canonical page: https://noometry.com/compare/inkling-vs-kimi-k2-5
- Last updated: 2026-10-11
- Shared benchmarks: 31

## Summary

- They share 31 benchmarks with published results for both. Inkling scores higher in 4 categories and Kimi K2.5 in 5 categories; 6 gaps are clear of the uncertainty.
- The widest gap is in math, where Kimi K2.5 leads 51.8 to 31.3.
- The biggest single-benchmark swing is ARC-AGI-2: 36.5% for Inkling and 11.8% for Kimi K2.5.
- Kimi K2.5 is cheaper at $0.45 / $2.25 per million input/output tokens, against $1.87 / $4.68 for Inkling.
- Kimi K2.5 accepts more context: 262K tokens versus 66K.

## Snapshot

| | Inkling | Kimi K2.5 |
|---|---|---|
| Provider | Thinking Machines Lab | Moonshot AI |
| Noometry Index | 44.1 | 48.1 |
| Rank | 80 | 57 |
| Context | 66K | 262K |
| Input $/M | $1.87 | $0.45 |
| Output $/M | $4.68 | $2.25 |
| Weights | Open | Open |

## Coding

- Inkling: 34.5 (#234)
- Kimi K2.5: 48.8 (#53)

| Benchmark | Inkling | Kimi K2.5 |
|---|---|---|
| LMArena WebDev | 1413 | 1437 |
| SciCode | 47% | 49% |
| WeirdML | 32.3% | 45.6% |
| LMArena Coding | 1464 | 1474 |
| ALE-Bench | 946 | 821.65 |
| SWE-bench Verified | — | 73.8% |
| FrontierCode | 14% | — |
| SWE-bench Verified (bash only) | — | 70.8% |
| SWE-bench Multilingual | — | 67.3% |
| FrontierSWE | 4.1% | — |

## Agentic & Tool Use

- Inkling: 29.6 (#85)
- Kimi K2.5: 34.2 (#48)

| Benchmark | Inkling | Kimi K2.5 |
|---|---|---|
| Terminal-Bench | — | 43.2% |
| APEX-Agents | 33.8% | — |
| τ²-bench Banking | 25% | — |
| OSWorld | — | 63.3% |
| Vending-Bench 2 | — | 1,198 |

## Reasoning

- Inkling: 40.4 (#56)
- Kimi K2.5: 31.2 (#80)

| Benchmark | Inkling | Kimi K2.5 |
|---|---|---|
| ARC-AGI-2 | 36.5% | 11.8% |
| SimpleBench | 50% | 46.8% |
| ARC-AGI-1 | 79.5% | 65.3% |
| CritPt | 5.4% | 3.1% |
| Chess Puzzles | 21% | 12% |
| LMArena Hard Prompts | 1451 | 1453 |
| Epoch Capabilities Index | 148.54 | 148.03 |
| Kagi LLM Benchmark | — | 78.5% |
| NYT Connections (extended) | — | 69.9% |
| EnigmaEval | — | 3.4% |
| Thematic Generalization | — | 69.4% |
| DTBench | 87.5% | — |
| LMCA | 37.6% | — |

## Math

- Inkling: 31.3 (#225)
- Kimi K2.5: 51.8 (#53)

| Benchmark | Inkling | Kimi K2.5 |
|---|---|---|
| OTIS Mock AIME 2024-2025 | 88.9% | 92.2% |
| LMArena Math | 1479 | 1470 |
| FrontierMath (Tiers 1-3) | 33.3% | — |
| FrontierMath Tier 4 | 4.9% | — |
| MathArena Final-Answer Competitions | — | 62.3% |
| ProofBench | 0% | — |
| FrontierMath (Feb 2025 set) | — | 27.9% |
| FrontierMath Tier 4 (v1) | — | 4.2% |

## Knowledge

- Inkling: 55.1 (#49)
- Kimi K2.5: 53.6 (#56)

| Benchmark | Inkling | Kimi K2.5 |
|---|---|---|
| GPQA Diamond | 88.3% | 87.6% |
| SimpleQA Verified | 40.3% | 34.3% |
| LMArena Expert | 1465 | 1466 |
| Humanity's Last Exam | — | 24.4% |
| Vectara Hallucination Rate | — | 14.2% |

## Multimodal

- Inkling: —
- Kimi K2.5: 41.1 (#39)

| Benchmark | Inkling | Kimi K2.5 |
|---|---|---|
| LMArena Vision | — | 1269 |
| LMArena Document | — | 1430 |

## Multilingual

- Inkling: 54.0 (#52)
- Kimi K2.5: 53.9 (#53)

| Benchmark | Inkling | Kimi K2.5 |
|---|---|---|
| LMArena Non-English | 1434 | 1433 |
| LMArena Chinese | 1490 | 1495 |
| LMArena French | 1458 | 1454 |
| LMArena German | 1446 | 1441 |
| LMArena Japanese | 1429 | 1421 |
| LMArena Korean | 1404 | 1410 |
| LMArena Russian | 1429 | 1435 |
| LMArena Spanish | 1448 | 1450 |

## Instruction Following

- Inkling: 75.1 (#71)
- Kimi K2.5: 75.3 (#64)

| Benchmark | Inkling | Kimi K2.5 |
|---|---|---|
| LMArena Instruction Following | 1426 | 1431 |

## Long Context

- Inkling: 43.8 (#86)
- Kimi K2.5: 52.1 (#7)

| Benchmark | Inkling | Kimi K2.5 |
|---|---|---|
| LMArena Longer Query | 1434 | 1445 |
| Fiction.LiveBench | — | 86.1% |
| CL-bench | — | 19.3% |
| CL-bench Life | — | 13.2% |

## Writing & Preference

- Inkling: 65.2 (#51)
- Kimi K2.5: 65.1 (#53)

| Benchmark | Inkling | Kimi K2.5 |
|---|---|---|
| LMArena Text | 1441 | 1445 |
| LMArena Creative Writing | 1387 | 1423 |
| EQ-Bench Creative Writing | 1611 | 1579 |
| LMArena Multi-Turn | 1436 | 1444 |
| EQ-Bench 4 | 1226 | — |

## FAQ

### Is Inkling better than Kimi K2.5?

Kimi K2.5 is the stronger model overall, scoring 48.1 to 44.1 on the Noometry Index.

### Which is cheaper, Inkling or Kimi K2.5?

Kimi K2.5 is cheaper. It lists at $0.45 per million input tokens and $2.25 per million output tokens; Inkling lists at $1.87 and $4.68.

### Is Inkling or Kimi K2.5 better for coding?

Kimi K2.5 scores higher on coding benchmarks: 48.8 versus 34.5 in the Noometry coding category.

### Which has the bigger context window?

Kimi K2.5 does, with 262K tokens against 66K.

### How many benchmarks do Inkling and Kimi K2.5 share?

31 benchmarks have published results for both models. Inkling has 41 scored results on Noometry and Kimi K2.5 has 51.