Model comparison
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.
Last verified . 3 shared benchmarks.
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.
Side by side
| Granite 4.0 Micro | Grok 4.5 | |
|---|---|---|
| Provider | IBM | xAI |
| Noometry Index | 28.8 | 55.0 |
| Released | 2025-10-02 | 2026-07-08 |
| Weights | Open | Proprietary |
| Context window | 131K | 500K |
| Max output | 118K | 500K |
| Input $ / M tokens | $0.017 | $2 |
| Output $ / M tokens | $0.11 | $6 |
| Results tracked | 8 | 52 |
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Category by category
Coding Not comparable
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 Not comparable
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 Grok 4.5 leads
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 Grok 4.5 leads
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 Grok 4.5 leads
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 Not comparable
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 Not comparable
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 Grok 4.5 leads
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 Not comparable
Granite 4.0 Micro: —, Grok 4.5: 44.8 (#54)
| Benchmark | Granite 4.0 Micro | Grok 4.5 |
|---|---|---|
| LMArena Longer Query | — | 1463 |
Writing & Preference Grok 4.5 leads
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 |
Frequently asked questions
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.