# Grok 4.5 vs Inkling

> Grok 4.5 is the stronger model overall, scoring 55.0 to 44.1 on the Noometry Index.

- Canonical page: https://noometry.com/compare/grok-4-5-vs-inkling
- Last updated: 2026-10-11
- Shared benchmarks: 39

## Summary

- They share 39 benchmarks with published results for both. Grok 4.5 scores higher in 9 categories and Inkling in 0 categories; 5 gaps are clear of the uncertainty.
- The widest gap is in math, where Grok 4.5 leads 60.9 to 31.3.
- The biggest single-benchmark swing is ProofBench: 31% for Grok 4.5 and 0% for Inkling.
- Inkling is cheaper at $1.87 / $4.68 per million input/output tokens, against $2 / $6 for Grok 4.5.
- Grok 4.5 accepts more context: 500K tokens versus 66K.
- Inkling has downloadable open weights; the other is API-only.

## Snapshot

| | Grok 4.5 | Inkling |
|---|---|---|
| Provider | xAI | Thinking Machines Lab |
| Noometry Index | 55.0 | 44.1 |
| Rank | 25 | 80 |
| Context | 500K | 66K |
| Input $/M | $2 | $1.87 |
| Output $/M | $6 | $4.68 |
| Weights | Proprietary | Open |

## Coding

- Grok 4.5: 52.2 (#35)
- Inkling: 34.5 (#234)

| Benchmark | Grok 4.5 | Inkling |
|---|---|---|
| FrontierCode | 42.4% | 14% |
| LMArena WebDev | 1553 | 1413 |
| SciCode | 54.1% | 47% |
| WeirdML | 46.4% | 32.3% |
| LMArena Coding | 1474 | 1464 |
| ALE-Bench | 1,309 | 946 |
| DeepSWE | 53.8% | — |
| FrontierSWE | — | 4.1% |

## Agentic & Tool Use

- Grok 4.5: 44.4 (#17)
- Inkling: 29.6 (#85)

| Benchmark | Grok 4.5 | Inkling |
|---|---|---|
| APEX-Agents | 56.2% | 33.8% |
| τ²-bench Banking | 47.9% | 25% |
| PostTrainBench | 23.4% | — |
| GBAEval | 65.4% | — |
| GDP.pdf | 14% | — |
| LMArena Search | 1213 | — |
| Vending-Bench 2 | 3,887 | — |

## Reasoning

- Grok 4.5: 56.1 (#25)
- Inkling: 40.4 (#56)

| Benchmark | Grok 4.5 | Inkling |
|---|---|---|
| ARC-AGI-2 | 52.6% | 36.5% |
| SimpleBench | 70% | 50% |
| ARC-AGI-1 | 87.2% | 79.5% |
| CritPt | 15.4% | 5.4% |
| Chess Puzzles | 36% | 21% |
| LMArena Hard Prompts | 1462 | 1451 |
| DTBench | 96.5% | 87.5% |
| LMCA | 45.2% | 37.6% |
| Epoch Capabilities Index | 153.92 | 148.54 |
| Kagi LLM Benchmark | 83.5% | — |
| NYT Connections (extended) | 79.9% | — |
| Surface Evolver Bench | 74.4% | — |

## Math

- Grok 4.5: 60.9 (#35)
- Inkling: 31.3 (#225)

| Benchmark | Grok 4.5 | Inkling |
|---|---|---|
| FrontierMath (Tiers 1-3) | 57.2% | 33.3% |
| FrontierMath Tier 4 | 24.4% | 4.9% |
| OTIS Mock AIME 2024-2025 | 97.8% | 88.9% |
| ProofBench | 31% | 0% |
| LMArena Math | 1459 | 1479 |

## Knowledge

- Grok 4.5: 62.3 (#24)
- Inkling: 55.1 (#49)

| Benchmark | Grok 4.5 | Inkling |
|---|---|---|
| GPQA Diamond | 93.4% | 88.3% |
| SimpleQA Verified | 48.3% | 40.3% |
| LMArena Expert | 1466 | 1465 |

## Multimodal

- Grok 4.5: 37.6 (#72)
- Inkling: —

| Benchmark | Grok 4.5 | Inkling |
|---|---|---|
| LMArena Vision | 1288 | — |
| Blueprint-Bench 2 | 27.3% | — |
| Furniture Assembly | 22.5% | — |
| LMArena Document | 1452 | — |

## Multilingual

- Grok 4.5: 54.4 (#42)
- Inkling: 54.0 (#52)

| Benchmark | Grok 4.5 | Inkling |
|---|---|---|
| LMArena Non-English | 1440 | 1434 |
| LMArena Chinese | 1496 | 1490 |
| LMArena French | 1456 | 1458 |
| LMArena German | 1446 | 1446 |
| LMArena Japanese | 1428 | 1429 |
| LMArena Korean | 1404 | 1404 |
| LMArena Russian | 1448 | 1429 |
| LMArena Spanish | 1450 | 1448 |

## Instruction Following

- Grok 4.5: 76.0 (#48)
- Inkling: 75.1 (#71)

| Benchmark | Grok 4.5 | Inkling |
|---|---|---|
| LMArena Instruction Following | 1446 | 1426 |

## Long Context

- Grok 4.5: 44.8 (#56)
- Inkling: 43.8 (#86)

| Benchmark | Grok 4.5 | Inkling |
|---|---|---|
| LMArena Longer Query | 1463 | 1434 |

## Writing & Preference

- Grok 4.5: 65.8 (#42)
- Inkling: 65.2 (#51)

| Benchmark | Grok 4.5 | Inkling |
|---|---|---|
| LMArena Text | 1448 | 1441 |
| LMArena Creative Writing | 1442 | 1387 |
| EQ-Bench Creative Writing | 1579 | 1611 |
| LMArena Multi-Turn | 1456 | 1436 |
| EQ-Bench 4 | — | 1226 |

## FAQ

### Is Grok 4.5 better than Inkling?

Grok 4.5 is the stronger model overall, scoring 55.0 to 44.1 on the Noometry Index.

### Which is cheaper, Grok 4.5 or Inkling?

Inkling is cheaper. It lists at $1.87 per million input tokens and $4.68 per million output tokens; Grok 4.5 lists at $2 and $6.

### Is Grok 4.5 or Inkling better for coding?

Grok 4.5 scores higher on coding benchmarks: 52.2 versus 34.5 in the Noometry coding category.

### Which has the bigger context window?

Grok 4.5 does, with 500K tokens against 66K.

### How many benchmarks do Grok 4.5 and Inkling share?

39 benchmarks have published results for both models. Grok 4.5 has 52 scored results on Noometry and Inkling has 41.