Model comparison
Grok 4.5 vs Nova Premier 1.0
Grok 4.5 is the stronger model overall, scoring 55.0 to 38.3 on the Noometry Index.
Last verified . 1 shared benchmarks.
Summary
- They share 1 benchmark with published results for both. Grok 4.5 scores higher in 5 categories and Nova Premier 1.0 in 0 categories; 5 gaps are clear of the uncertainty.
- The widest gap is in reasoning, where Grok 4.5 leads 56.1 to 23.0.
- The biggest single-benchmark swing is Kagi LLM Benchmark: 83.5% for Grok 4.5 and 44.8% for Nova Premier 1.0.
- Grok 4.5 is cheaper at $2 / $6 per million input/output tokens, against $2.50 / $12.50 for Nova Premier 1.0.
- Nova Premier 1.0 accepts more context: 1M tokens versus 500K.
Side by side
| Grok 4.5 | Nova Premier 1.0 | |
|---|---|---|
| Provider | xAI | Amazon |
| Noometry Index | 55.0 | 38.3 |
| Released | 2026-07-08 | 2025-04-30 |
| Weights | Proprietary | Proprietary |
| Context window | 500K | 1M |
| Max output | 500K | 10K |
| Input $ / M tokens | $2 | $2.50 |
| Output $ / M tokens | $6 | $12.50 |
| Results tracked | 52 | 6 |
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Category by category
Coding Not comparable
Grok 4.5: 52.2 (#35), Nova Premier 1.0: —
| Benchmark | Grok 4.5 | Nova Premier 1.0 |
|---|---|---|
| DeepSWE | 53.8% | — |
| FrontierCode | 42.4% | — |
| LMArena WebDev | 1553 | — |
| SciCode | 54.1% | — |
| WeirdML | 46.4% | — |
| LMArena Coding | 1474 | — |
| ALE-Bench | 1,309 | — |
Agentic & Tool Use Not comparable
Grok 4.5: 44.4 (#17), Nova Premier 1.0: —
| Benchmark | Grok 4.5 | Nova Premier 1.0 |
|---|---|---|
| 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
Grok 4.5: 56.1 (#25), Nova Premier 1.0: 23.0 (#185)
| Benchmark | Grok 4.5 | Nova Premier 1.0 |
|---|---|---|
| Kagi LLM Benchmark | 83.5% | 44.8% |
| ARC-AGI-2 | 52.6% | — |
| SimpleBench | 70% | — |
| NYT Connections (extended) | 79.9% | — |
| ARC-AGI-1 | 87.2% | — |
| CritPt | 15.4% | — |
| Chess Puzzles | 36% | — |
| LMArena Hard Prompts | 1462 | — |
| DTBench | 96.5% | — |
| LMCA | 45.2% | — |
| Surface Evolver Bench | 74.4% | — |
| Epoch Capabilities Index | 153.92 | — |
Math Grok 4.5 leads
Grok 4.5: 60.9 (#35), Nova Premier 1.0: 33.8 (#199)
| Benchmark | Grok 4.5 | Nova Premier 1.0 |
|---|---|---|
| FrontierMath (Tiers 1-3) | 57.2% | — |
| FrontierMath Tier 4 | 24.4% | — |
| OTIS Mock AIME 2024-2025 | 97.8% | — |
| ProofBench | 31% | — |
| Omni-MATH | — | 35% |
| LMArena Math | 1459 | — |
Knowledge Grok 4.5 leads
Grok 4.5: 62.3 (#24), Nova Premier 1.0: 35.8 (#180)
| Benchmark | Grok 4.5 | Nova Premier 1.0 |
|---|---|---|
| GPQA Diamond | 93.4% | — |
| SimpleQA Verified | 48.3% | — |
| MMLU-Pro | — | 72.6% |
| GPQA (HELM) | — | 51.8% |
| LMArena Expert | 1466 | — |
Multimodal Not comparable
Grok 4.5: 37.6 (#72), Nova Premier 1.0: —
| Benchmark | Grok 4.5 | Nova Premier 1.0 |
|---|---|---|
| LMArena Vision | 1288 | — |
| Blueprint-Bench 2 | 27.3% | — |
| Furniture Assembly | 22.5% | — |
| LMArena Document | 1452 | — |
Multilingual Not comparable
Grok 4.5: 54.4 (#42), Nova Premier 1.0: —
| Benchmark | Grok 4.5 | Nova Premier 1.0 |
|---|---|---|
| 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 Grok 4.5 leads
Grok 4.5: 76.0 (#48), Nova Premier 1.0: 66.8 (#204)
| Benchmark | Grok 4.5 | Nova Premier 1.0 |
|---|---|---|
| IFEval | — | 80.3% |
| LMArena Instruction Following | 1446 | — |
Long Context Not comparable
Grok 4.5: 44.8 (#56), Nova Premier 1.0: —
| Benchmark | Grok 4.5 | Nova Premier 1.0 |
|---|---|---|
| LMArena Longer Query | 1463 | — |
Writing & Preference Grok 4.5 leads
Grok 4.5: 65.8 (#42), Nova Premier 1.0: 51.0 (#178)
| Benchmark | Grok 4.5 | Nova Premier 1.0 |
|---|---|---|
| LMArena Text | 1448 | — |
| LMArena Creative Writing | 1442 | — |
| EQ-Bench Creative Writing | 1579 | — |
| WildBench | — | 78.8% |
| LMArena Multi-Turn | 1456 | — |
Frequently asked questions
Is Grok 4.5 better than Nova Premier 1.0?
Grok 4.5 is the stronger model overall, scoring 55.0 to 38.3 on the Noometry Index.
Which is cheaper, Grok 4.5 or Nova Premier 1.0?
Grok 4.5 is cheaper. It lists at $2 per million input tokens and $6 per million output tokens; Nova Premier 1.0 lists at $2.50 and $12.50.
Which has the bigger context window?
Nova Premier 1.0 does, with 1M tokens against 500K.
How many benchmarks do Grok 4.5 and Nova Premier 1.0 share?
1 benchmark has published results for both models. Grok 4.5 has 52 scored results on Noometry and Nova Premier 1.0 has 6.