Model comparison
Gemini 3.1 Flash Lite vs Grok 4.20 Multi-Agent
Grok 4.20 Multi-Agent is the stronger model overall, scoring 45.5 to 40.4 on the Noometry Index. Gemini 3.1 Flash Lite costs 2.8× less per token, which makes it the better buy when Grok 4.20 Multi-Agent's lead doesn't matter for your workload.
Last verified . 19 shared benchmarks.
GoogleSummary
- They share 19 benchmarks with published results for both. Gemini 3.1 Flash Lite scores higher in 2 categories and Grok 4.20 Multi-Agent in 7 categories; 9 gaps are clear of the uncertainty.
- The widest gap is in reasoning, where Grok 4.20 Multi-Agent leads 42.4 to 22.3.
- The biggest single-benchmark swing is NYT Connections (extended): 8.2% for Gemini 3.1 Flash Lite and 89.6% for Grok 4.20 Multi-Agent.
- Gemini 3.1 Flash Lite is cheaper at $0.25 / $1.50 per million input/output tokens, against $1.25 / $2.50 for Grok 4.20 Multi-Agent.
- Gemini 3.1 Flash Lite accepts more context: 1.05M tokens versus 1M.
Side by side
| Gemini 3.1 Flash Lite | Grok 4.20 Multi-Agent | |
|---|---|---|
| Provider | xAI | |
| Noometry Index | 40.4 | 45.5 |
| Released | 2026-03-03 | 2026-03-09 |
| Weights | Proprietary | Proprietary |
| Context window | 1.05M | 1M |
| Max output | 66K | 30K |
| Input $ / M tokens | $0.25 | $1.25 |
| Output $ / M tokens | $1.50 | $2.50 |
| Results tracked | 38 | 20 |
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Category by category
Coding Grok 4.20 Multi-Agent leads
Gemini 3.1 Flash Lite: 37.5 (#179), Grok 4.20 Multi-Agent: 42.4 (#91)
| Benchmark | Gemini 3.1 Flash Lite | Grok 4.20 Multi-Agent |
|---|---|---|
| LMArena Coding | 1400 | 1458 |
| LMArena WebDev | 1256 | — |
| SciCode | 41.9% | — |
| WeirdML | 52.2% | — |
| ALE-Bench | 797.73 | — |
Agentic & Tool Use Not comparable
Gemini 3.1 Flash Lite: 29.9 (#72), Grok 4.20 Multi-Agent: —
| Benchmark | Gemini 3.1 Flash Lite | Grok 4.20 Multi-Agent |
|---|---|---|
| DeepResearch Bench | 37.3% | — |
| LMArena Search | — | 1204 |
Reasoning Grok 4.20 Multi-Agent leads
Gemini 3.1 Flash Lite: 22.3 (#181), Grok 4.20 Multi-Agent: 42.4 (#44)
| Benchmark | Gemini 3.1 Flash Lite | Grok 4.20 Multi-Agent |
|---|---|---|
| NYT Connections (extended) | 8.2% | 89.6% |
| LMArena Hard Prompts | 1407 | 1448 |
| Kagi LLM Benchmark | 67.2% | — |
| CritPt | 1.1% | — |
| Chess Puzzles | 25% | — |
| EnigmaEval | 3% | — |
| Thematic Generalization | 63.3% | — |
| DTBench | 76.8% | — |
| LMCA | 35% | — |
| Epoch Capabilities Index | 144.45 | — |
| ForecastBench | 54.4 | — |
Math Gemini 3.1 Flash Lite leads
Gemini 3.1 Flash Lite: 39.5 (#82), Grok 4.20 Multi-Agent: 36.6 (#106)
| Benchmark | Gemini 3.1 Flash Lite | Grok 4.20 Multi-Agent |
|---|---|---|
| LMArena Math | 1427 | 1441 |
| FrontierMath (Tiers 1-3) | 27.7% | — |
| OTIS Mock AIME 2024-2025 | 80% | — |
Knowledge Gemini 3.1 Flash Lite leads
Gemini 3.1 Flash Lite: 41.7 (#95), Grok 4.20 Multi-Agent: 39.7 (#116)
| Benchmark | Gemini 3.1 Flash Lite | Grok 4.20 Multi-Agent |
|---|---|---|
| LMArena Expert | 1397 | 1445 |
| GPQA Diamond | 81.8% | — |
| Humanity's Last Exam | 8.6% | — |
| Vectara Hallucination Rate | 8.2% | — |
Multimodal Grok 4.20 Multi-Agent leads
Gemini 3.1 Flash Lite: 38.7 (#57), Grok 4.20 Multi-Agent: 39.8 (#44)
| Benchmark | Gemini 3.1 Flash Lite | Grok 4.20 Multi-Agent |
|---|---|---|
| LMArena Vision | 1240 | 1259 |
Multilingual Grok 4.20 Multi-Agent leads
Gemini 3.1 Flash Lite: 52.5 (#82), Grok 4.20 Multi-Agent: 54.6 (#40)
| Benchmark | Gemini 3.1 Flash Lite | Grok 4.20 Multi-Agent |
|---|---|---|
| LMArena Non-English | 1410 | 1440 |
| LMArena Chinese | 1461 | 1475 |
| LMArena French | 1423 | 1467 |
| LMArena German | 1429 | 1456 |
| LMArena Japanese | 1411 | 1405 |
| LMArena Korean | 1393 | 1416 |
| LMArena Russian | 1420 | 1457 |
| LMArena Spanish | 1420 | 1447 |
Instruction Following Grok 4.20 Multi-Agent leads
Gemini 3.1 Flash Lite: 72.9 (#126), Grok 4.20 Multi-Agent: 75.0 (#80)
| Benchmark | Gemini 3.1 Flash Lite | Grok 4.20 Multi-Agent |
|---|---|---|
| LMArena Instruction Following | 1376 | 1420 |
Long Context Grok 4.20 Multi-Agent leads
Gemini 3.1 Flash Lite: 42.5 (#117), Grok 4.20 Multi-Agent: 43.7 (#84)
| Benchmark | Gemini 3.1 Flash Lite | Grok 4.20 Multi-Agent |
|---|---|---|
| LMArena Longer Query | 1394 | 1430 |
Writing & Preference Grok 4.20 Multi-Agent leads
Gemini 3.1 Flash Lite: 61.0 (#90), Grok 4.20 Multi-Agent: 64.1 (#57)
| Benchmark | Gemini 3.1 Flash Lite | Grok 4.20 Multi-Agent |
|---|---|---|
| LMArena Text | 1416 | 1450 |
| LMArena Creative Writing | 1401 | 1435 |
| LMArena Multi-Turn | 1417 | 1451 |
Frequently asked questions
Is Gemini 3.1 Flash Lite better than Grok 4.20 Multi-Agent?
Grok 4.20 Multi-Agent is the stronger model overall, scoring 45.5 to 40.4 on the Noometry Index. Gemini 3.1 Flash Lite costs 2.8× less per token, which makes it the better buy when Grok 4.20 Multi-Agent's lead doesn't matter for your workload.
Which is cheaper, Gemini 3.1 Flash Lite or Grok 4.20 Multi-Agent?
Gemini 3.1 Flash Lite is cheaper. It lists at $0.25 per million input tokens and $1.50 per million output tokens; Grok 4.20 Multi-Agent lists at $1.25 and $2.50.
Is Gemini 3.1 Flash Lite or Grok 4.20 Multi-Agent better for coding?
Grok 4.20 Multi-Agent scores higher on coding benchmarks: 42.4 versus 37.5 in the Noometry coding category.
Which has the bigger context window?
Gemini 3.1 Flash Lite does, with 1.05M tokens against 1M.
How many benchmarks do Gemini 3.1 Flash Lite and Grok 4.20 Multi-Agent share?
19 benchmarks have published results for both models. Gemini 3.1 Flash Lite has 38 scored results on Noometry and Grok 4.20 Multi-Agent has 20.