Model comparison
Grok 4.5 vs Grok Build 0.1
Grok 4.5 is the stronger model overall, scoring 55.0 to 36.4 on the Noometry Index. Grok Build 0.1 costs 2.4× 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. Grok 4.5 scores higher in 3 categories and Grok Build 0.1 in 0 categories; 3 gaps are clear of the uncertainty.
- The widest gap is in reasoning, where Grok 4.5 leads 56.1 to 32.2.
- The biggest single-benchmark swing is GBAEval: 65.4% for Grok 4.5 and 2.4% for Grok Build 0.1.
- Grok Build 0.1 is cheaper at $1 / $2 per million input/output tokens, against $2 / $6 for Grok 4.5.
- Grok 4.5 accepts more context: 500K tokens versus 256K.
Side by side
| Grok 4.5 | Grok Build 0.1 | |
|---|---|---|
| Provider | xAI | xAI |
| Noometry Index | 55.0 | 36.4 |
| Released | 2026-07-08 | 2026-04-16 |
| Weights | Proprietary | Proprietary |
| Context window | 500K | 256K |
| Max output | 500K | 256K |
| Input $ / M tokens | $2 | $1 |
| Output $ / M tokens | $6 | $2 |
| Results tracked | 52 | 3 |
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Category by category
Coding Grok 4.5 leads
Grok 4.5: 52.2 (#35), Grok Build 0.1: 43.1 (#91)
| Benchmark | Grok 4.5 | Grok Build 0.1 |
|---|---|---|
| SciCode | 54.1% | 50.2% |
| DeepSWE | 53.8% | — |
| FrontierCode | 42.4% | — |
| LMArena WebDev | 1553 | — |
| WeirdML | 46.4% | — |
| LMArena Coding | 1474 | — |
| ALE-Bench | 1,309 | — |
Agentic & Tool Use Grok 4.5 leads
Grok 4.5: 44.4 (#17), Grok Build 0.1: 22.7 (#129)
| Benchmark | Grok 4.5 | Grok Build 0.1 |
|---|---|---|
| GBAEval | 65.4% | 2.4% |
| APEX-Agents | 56.2% | — |
| τ²-bench Banking | 47.9% | — |
| PostTrainBench | 23.4% | — |
| GDP.pdf | 14% | — |
| LMArena Search | 1213 | — |
| Vending-Bench 2 | 3,887 | — |
Reasoning Grok 4.5 leads
Grok 4.5: 56.1 (#25), Grok Build 0.1: 32.2 (#77)
| Benchmark | Grok 4.5 | Grok Build 0.1 |
|---|---|---|
| CritPt | 15.4% | 9.1% |
| ARC-AGI-2 | 52.6% | — |
| SimpleBench | 70% | — |
| Kagi LLM Benchmark | 83.5% | — |
| NYT Connections (extended) | 79.9% | — |
| ARC-AGI-1 | 87.2% | — |
| Chess Puzzles | 36% | — |
| LMArena Hard Prompts | 1462 | — |
| DTBench | 96.5% | — |
| LMCA | 45.2% | — |
| Surface Evolver Bench | 74.4% | — |
| Epoch Capabilities Index | 153.92 | — |
Math Not comparable
Grok 4.5: 60.9 (#35), Grok Build 0.1: —
| Benchmark | Grok 4.5 | Grok Build 0.1 |
|---|---|---|
| FrontierMath (Tiers 1-3) | 57.2% | — |
| FrontierMath Tier 4 | 24.4% | — |
| OTIS Mock AIME 2024-2025 | 97.8% | — |
| ProofBench | 31% | — |
| LMArena Math | 1459 | — |
Knowledge Not comparable
Grok 4.5: 62.3 (#24), Grok Build 0.1: —
| Benchmark | Grok 4.5 | Grok Build 0.1 |
|---|---|---|
| GPQA Diamond | 93.4% | — |
| SimpleQA Verified | 48.3% | — |
| LMArena Expert | 1466 | — |
Multimodal Not comparable
Grok 4.5: 37.6 (#72), Grok Build 0.1: —
| Benchmark | Grok 4.5 | Grok Build 0.1 |
|---|---|---|
| LMArena Vision | 1288 | — |
| Blueprint-Bench 2 | 27.3% | — |
| Furniture Assembly | 22.5% | — |
| LMArena Document | 1452 | — |
Multilingual Not comparable
Grok 4.5: 54.4 (#42), Grok Build 0.1: —
| Benchmark | Grok 4.5 | Grok Build 0.1 |
|---|---|---|
| LMArena Non-English | 1440 | — |
| LMArena Chinese | 1496 | — |
| LMArena French | 1456 | — |
| LMArena German | 1446 | — |
| LMArena Japanese | 1428 | — |
| LMArena Korean | 1404 | — |
| LMArena Russian | 1448 | — |
| LMArena Spanish | 1450 | — |
Instruction Following Not comparable
Grok 4.5: 76.0 (#48), Grok Build 0.1: —
| Benchmark | Grok 4.5 | Grok Build 0.1 |
|---|---|---|
| LMArena Instruction Following | 1446 | — |
Long Context Not comparable
Grok 4.5: 44.8 (#56), Grok Build 0.1: —
| Benchmark | Grok 4.5 | Grok Build 0.1 |
|---|---|---|
| LMArena Longer Query | 1463 | — |
Writing & Preference Not comparable
Grok 4.5: 65.8 (#42), Grok Build 0.1: —
| Benchmark | Grok 4.5 | Grok Build 0.1 |
|---|---|---|
| LMArena Text | 1448 | — |
| LMArena Creative Writing | 1442 | — |
| EQ-Bench Creative Writing | 1579 | — |
| LMArena Multi-Turn | 1456 | — |
Frequently asked questions
Is Grok 4.5 better than Grok Build 0.1?
Grok 4.5 is the stronger model overall, scoring 55.0 to 36.4 on the Noometry Index. Grok Build 0.1 costs 2.4× less per token, which makes it the better buy when Grok 4.5's lead doesn't matter for your workload.
Which is cheaper, Grok 4.5 or Grok Build 0.1?
Grok Build 0.1 is cheaper. It lists at $1 per million input tokens and $2 per million output tokens; Grok 4.5 lists at $2 and $6.
Is Grok 4.5 or Grok Build 0.1 better for coding?
Grok 4.5 scores higher on coding benchmarks: 52.2 versus 43.1 in the Noometry coding category.
Which has the bigger context window?
Grok 4.5 does, with 500K tokens against 256K.
How many benchmarks do Grok 4.5 and Grok Build 0.1 share?
3 benchmarks have published results for both models. Grok 4.5 has 52 scored results on Noometry and Grok Build 0.1 has 3.