# Granite 4.0 Micro vs Grok 4.5

> Grok 4.5 is the stronger model overall, scoring 55.0 to 28.8 on the Noometry Index. Granite 4.0 Micro costs 74× less per token, which makes it the better buy when Grok 4.5's lead doesn't matter for your workload.

- Canonical page: https://noometry.com/compare/granite-4-0-micro-vs-grok-4-5
- Last updated: 2026-10-10
- Shared benchmarks: 3

## Summary

- They share 3 benchmarks with published results for both. Granite 4.0 Micro scores higher in 0 categories and Grok 4.5 in 5 categories; 5 gaps are clear of the uncertainty.
- The widest gap is in knowledge, where Grok 4.5 leads 62.3 to 9.9.
- The biggest single-benchmark swing is OTIS Mock AIME 2024-2025: 2.8% for Granite 4.0 Micro and 97.8% for Grok 4.5.
- Granite 4.0 Micro is cheaper at $0.017 / $0.11 per million input/output tokens, against $2 / $6 for Grok 4.5.
- Grok 4.5 accepts more context: 500K tokens versus 131K.
- Granite 4.0 Micro has downloadable open weights; the other is API-only.

## Snapshot

| | Granite 4.0 Micro | Grok 4.5 |
|---|---|---|
| Provider | IBM | xAI |
| Noometry Index | 28.8 | 55.0 |
| Rank | 312 | 22 |
| Context | 131K | 500K |
| Input $/M | $0.017 | $2 |
| Output $/M | $0.11 | $6 |
| Weights | Open | Proprietary |

## Coding

- Granite 4.0 Micro: —
- Grok 4.5: 51.7 (#34)

| Benchmark | Granite 4.0 Micro | Grok 4.5 |
|---|---|---|
| DeepSWE | — | 53.8% |
| FrontierCode | — | 42.4% |
| LMArena WebDev | — | 1552 |
| SciCode | — | 54.1% |
| WeirdML | — | 46.4% |
| LMArena Coding | — | 1473 |
| ALE-Bench | — | 1,309 |

## Agentic & Tool Use

- Granite 4.0 Micro: —
- Grok 4.5: 44.4 (#15)

| Benchmark | Granite 4.0 Micro | Grok 4.5 |
|---|---|---|
| APEX-Agents | — | 56.2% |
| τ²-bench Banking | — | 47.9% |
| PostTrainBench | — | 23.4% |
| GBAEval | — | 65.4% |
| GDP.pdf | — | 14% |
| LMArena Search | — | 1213 |
| Vending-Bench 2 | — | 3,887 |

## Reasoning

- Granite 4.0 Micro: 18.5 (#261)
- Grok 4.5: 56.0 (#23)

| Benchmark | Granite 4.0 Micro | Grok 4.5 |
|---|---|---|
| Chess Puzzles | 0% | 36% |
| ARC-AGI-2 | — | 52.6% |
| SimpleBench | — | 70% |
| Kagi LLM Benchmark | — | 83.5% |
| NYT Connections (extended) | — | 79.9% |
| ARC-AGI-1 | — | 87.2% |
| CritPt | — | 15.4% |
| LMArena Hard Prompts | — | 1462 |
| DTBench | — | 96.5% |
| LMCA | — | 45.2% |
| Surface Evolver Bench | — | 74.4% |
| Epoch Capabilities Index | — | 154.02 |

## Math

- Granite 4.0 Micro: 11.2 (#301)
- Grok 4.5: 60.7 (#29)

| Benchmark | Granite 4.0 Micro | Grok 4.5 |
|---|---|---|
| OTIS Mock AIME 2024-2025 | 2.8% | 97.8% |
| FrontierMath (Tiers 1-3) | — | 57.2% |
| FrontierMath Tier 4 | — | 24.4% |
| ProofBench | — | 31% |
| Omni-MATH | 20.9% | — |
| LMArena Math | — | 1457 |

## Knowledge

- Granite 4.0 Micro: 9.9 (#299)
- Grok 4.5: 62.3 (#21)

| Benchmark | Granite 4.0 Micro | Grok 4.5 |
|---|---|---|
| GPQA Diamond | 28.3% | 93.4% |
| SimpleQA Verified | — | 48.3% |
| MMLU-Pro | 39.5% | — |
| GPQA (HELM) | 30.7% | — |
| LMArena Expert | — | 1466 |

## Multimodal

- Granite 4.0 Micro: —
- Grok 4.5: 37.8 (#63)

| Benchmark | Granite 4.0 Micro | Grok 4.5 |
|---|---|---|
| LMArena Vision | — | 1287 |
| Blueprint-Bench 2 | — | 27.3% |
| Furniture Assembly | — | 22.5% |
| LMArena Document | — | 1452 |

## Multilingual

- Granite 4.0 Micro: —
- Grok 4.5: 54.5 (#43)

| Benchmark | Granite 4.0 Micro | Grok 4.5 |
|---|---|---|
| LMArena Non-English | — | 1439 |
| LMArena Chinese | — | 1497 |
| LMArena French | — | 1458 |
| LMArena German | — | 1448 |
| LMArena Japanese | — | 1425 |
| LMArena Korean | — | 1402 |
| LMArena Russian | — | 1447 |
| LMArena Spanish | — | 1452 |

## Instruction Following

- Granite 4.0 Micro: 70.0 (#164)
- Grok 4.5: 76.3 (#45)

| Benchmark | Granite 4.0 Micro | Grok 4.5 |
|---|---|---|
| IFEval | 84.9% | — |
| LMArena Instruction Following | — | 1446 |

## Long Context

- Granite 4.0 Micro: —
- Grok 4.5: 44.8 (#54)

| Benchmark | Granite 4.0 Micro | Grok 4.5 |
|---|---|---|
| LMArena Longer Query | — | 1463 |

## Writing & Preference

- Granite 4.0 Micro: 46.7 (#212)
- Grok 4.5: 65.9 (#40)

| Benchmark | Granite 4.0 Micro | Grok 4.5 |
|---|---|---|
| LMArena Text | — | 1448 |
| LMArena Creative Writing | — | 1442 |
| EQ-Bench Creative Writing | — | 1579 |
| WildBench | 67% | — |
| LMArena Multi-Turn | — | 1457 |

## FAQ

### Is Granite 4.0 Micro better than Grok 4.5?

Grok 4.5 is the stronger model overall, scoring 55.0 to 28.8 on the Noometry Index. Granite 4.0 Micro costs 74× less per token, which makes it the better buy when Grok 4.5's lead doesn't matter for your workload.

### Which is cheaper, Granite 4.0 Micro or Grok 4.5?

Granite 4.0 Micro is cheaper. It lists at $0.017 per million input tokens and $0.11 per million output tokens; Grok 4.5 lists at $2 and $6.

### Which has the bigger context window?

Grok 4.5 does, with 500K tokens against 131K.

### How many benchmarks do Granite 4.0 Micro and Grok 4.5 share?

3 benchmarks have published results for both models. Granite 4.0 Micro has 8 scored results on Noometry and Grok 4.5 has 52.