Model comparison
Grok 4 Fast (Reasoning) vs Nemotron 3 Nano Omni 30B A3B
Head-to-head evidence from 12 shared benchmark results across 6 categories. Overall scores shown here use the public BenchAlign v5 ranking lane.
Public leaderboard positions: Grok 4 Fast (Reasoning) #83 (Supported); Nemotron 3 Nano Omni 30B A3B #159 (Estimated). Intervals and evidence labels describe ranking uncertainty, not a guarantee for a specific workload.
Evidence parity. Grok 4 Fast (Reasoning) and Nemotron 3 Nano Omni 30B A3B share 12 comparable benchmark results. 0 of 8 categories are comparable. 1 result is unique to Grok 4 Fast (Reasoning); 17 to Nemotron 3 Nano Omni 30B A3B.
Updated July 27, 2026- Shared results
- 12
- Grok 4 Fast (Reasoning) only
- 1
- Nemotron 3 Nano Omni 30B A3B only
- 17
- Comparable categories
- 0 / 8
Benchmark data for Grok 4 Fast (Reasoning) and Nemotron 3 Nano Omni 30B A3B is coming soon on BenchLM.
Confidence note. This is a partial-evidence comparison with 12 shared benchmark results across 6 evidence categories; 0 of 8 categories currently have scoreable aggregates for both models. Treat the verdict as directional until coverage is more balanced.
Why this result
BenchLM has partial data for these models, but not enough overlapping benchmark coverage to produce a fair score-level comparison yet.
Grok 4 Fast (Reasoning) has the larger context window at 2M, compared with 256K for Nemotron 3 Nano Omni 30B A3B.
Category breakdown
Exact category averages are shown below. Not measured means BenchLM does not have enough sourced public coverage for that model and category.
| Category | Grok 4 Fast (Reasoning) | Δ | Nemotron 3 Nano Omni 30B A3B |
|---|---|---|---|
| Coding | Grok 4 Fast (Reasoning)Not measured | MarginNo overlap | Nemotron 3 Nano Omni 30B A3B32.0 |
| Knowledge | Grok 4 Fast (Reasoning)Not measured | MarginNo overlap | Nemotron 3 Nano Omni 30B A3B76.3 |
| Multimodal | Grok 4 Fast (Reasoning)Not measured | MarginNo overlap | Nemotron 3 Nano Omni 30B A3B76.3 |
| Inst. Following | Grok 4 Fast (Reasoning)Not measured | MarginNo overlap | Nemotron 3 Nano Omni 30B A3B74.2 |
Operational comparison
Runtime and commercial metrics are compared only when both models have a complete sourced value.
| Metric | Grok 4 Fast (Reasoning) | Nemotron 3 Nano Omni 30B A3B | Comparison |
|---|---|---|---|
| Input / output priceUSD per 1M tokens | Grok 4 Fast (Reasoning)Not available | Nemotron 3 Nano Omni 30B A3B$0 input / $0 output | A complete price comparison is not available. |
| Generation speedtokens per second | Grok 4 Fast (Reasoning)Not available | Nemotron 3 Nano Omni 30B A3BNot available | A complete speed comparison is not available. |
| First-answer latencyseconds to first token | Grok 4 Fast (Reasoning)Not available | Nemotron 3 Nano Omni 30B A3BNot available | A complete latency comparison is not available. |
| Context windowmaximum listed tokens | Grok 4 Fast (Reasoning)2M | Nemotron 3 Nano Omni 30B A3B256K | Grok 4 Fast (Reasoning) lists the larger context window. |
Benchmark Deep Dive
Agentic4 benchmarks
Coding4 benchmarks
Reasoning2 benchmarks
Knowledge9 benchmarks
| Benchmark | Grok 4 Fast (Reasoning) | Nemotron 3 Nano Omni 30B A3B | Result |
|---|---|---|---|
| Artificial Analysis Intelligence IndexSource | 27.4% | 14.9% | Grok 4 Fast (Reasoning) leads |
| AA-GPQA DiamondSource | 84.7% | 46.9% | Grok 4 Fast (Reasoning) leads |
| AA-HLESource | 17.0% | 5.3% | Grok 4 Fast (Reasoning) leads |
| AA-Omniscience IndexSource | -28.4% | -56.0% | Grok 4 Fast (Reasoning) leads |
| AA-Omniscience AccuracySource | 22.6% | 14.8% | Grok 4 Fast (Reasoning) leads |
| AA-Omniscience Hallucination RateSource | 66.0% | 83.1% | Grok 4 Fast (Reasoning) leads |
| MMLU-ProSource | — | 77.3% | Not comparable |
| GPQASource | — | 72.2% | Not comparable |
| GPQA-DSource | — | 72.2% | Not comparable |
Math1 benchmarks
| Benchmark | Grok 4 Fast (Reasoning) | Nemotron 3 Nano Omni 30B A3B | Result |
|---|---|---|---|
| AIME 2025Source | — | 82.1% | Not comparable |
Multimodal8 benchmarks
| Benchmark | Grok 4 Fast (Reasoning) | Nemotron 3 Nano Omni 30B A3B | Result |
|---|---|---|---|
| AA-MMMU-ProSource | 61.8% | 53.2% | Grok 4 Fast (Reasoning) leads |
| MMMUSource | — | 70.8% | Not comparable |
| MMLongBench-DocSource | — | 57.5% | Not comparable |
| CharXivSource | — | 76.3% | Not comparable |
| ScreenSpot ProSource | — | 57.8% | Not comparable |
| Video-MME (w/o subtitle)Source | — | 72.2% | Not comparable |
| AI2D_TESTSource | — | 88.5% | Not comparable |
| RefCOCO (avg)Source | — | 90.5% | Not comparable |
Frequently Asked Questions (3)
Can I compare Grok 4 Fast (Reasoning) and Nemotron 3 Nano Omni 30B A3B on BenchLM yet?
Not fully yet. BenchLM is tracking both models, but the sourced benchmark breakdown for this comparison is still coming soon.
Why does this comparison show “coming soon”?
BenchLM only shows category winners and benchmark-level calls when we have sourced results that can be compared fairly. For these models, the public benchmark coverage is not complete enough yet.
What data is available for Grok 4 Fast (Reasoning) and Nemotron 3 Nano Omni 30B A3B today?
Nemotron 3 Nano Omni 30B A3B: $0.00 input / $0.00 output per 1M tokens Both model pages still include creator, context window, reasoning mode, and other metadata while benchmark coverage fills in.
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