Compare / head-to-head
Gemini 3.1 Flash-LitevsGrok 4.20 Reasoning
Grok 4.20 Reasoning leads 3 of 4 shared benchmarks. Gemini 3.1 Flash-Lite is 2.1x cheaper per token. Gemini 3.1 Flash-Lite has the larger context window (1.0M tokens).
Benchmarks from cited public sources; pricing from official pages; status from official provider feeds.
Shared benchmarks
1 – 3
Grok 4.20 Reasoning leads
Cheaper per token
Gemini 3.1 Flash-Lite
2.1x cheaper, input + output
Larger context
Gemini 3.1 Flash-Lite
1.0M tokens
Provider uptime (30d)
100% · —
Google · xAI
Gemini 3.1 Flash-Lite
Google · released 2026-03-03
textvisionaudio
Grok 4.20 Reasoning
xAI · released 2026-03-09
textvision
Quality
Benchmark matrix
4 shared · 5 only Gemini 3.1 Flash-Lite · 1 only Grok 4.20 Reasoning| Benchmark | Gemini 3.1 Flash-Lite | Grok 4.20 Reasoning | Δ | Edge |
|---|---|---|---|---|
| Reported by both · 4 | ||||
| GPQA Diamond | 86.9% ↗ | 89.3% ↗epoch | -2.4 pt | Grok 4.20 Reasoning |
| FrontierMath Tiers 1-3 v2 (Epoch AI run) | 27.7% ↗epoch | 44.9% ↗epoch | -17.2 pt | Grok 4.20 Reasoning |
| OTIS Mock AIME 2024-2025 (Epoch AI run) | 80% ↗epoch | 92.2% ↗epoch | -12.2 pt | Grok 4.20 Reasoning |
| SimpleQA Verified | 43.3% ↗ | 30.2% ↗epoch | +13.1 pt | Gemini 3.1 Flash-Lite |
| Only Gemini 3.1 Flash-Lite reports · 5 | ||||
| Humanity's Last Exam (no tools) | 16% ↗ | not reported | — | — |
| LiveCodeBench | 72% ↗ | not reported | — | — |
| MMMLU | 88.9% ↗ | not reported | — | — |
| MMMU-Pro | 76.8% ↗ | not reported | — | — |
| MRCR v2 (128k average) | 60.1% ↗ | not reported | — | — |
| Only Grok 4.20 Reasoning reports · 1 | ||||
| FrontierMath Tier 4 v2 (Epoch AI run) | not reported | 17.1% ↗epoch | — | — |
Scores tagged "epoch" or "matharena" are independent runs, used only where the lab has not published its own; ⚠ marks rows MathArena flags as released after the competition. Higher is better on every row. Δ is Gemini 3.1 Flash-Lite minus Grok 4.20 Reasoning in the benchmark's own unit. "Not reported" means the lab has not published that figure; it is not a zero. ↗ opens the source.
Specs & pricing
Side by side
Official pricing pages and model cards| Spec | Gemini 3.1 Flash-Lite | Grok 4.20 Reasoning | Edge |
|---|---|---|---|
| Context window | 1.0M tokens | 1M tokens | Gemini 3.1 Flash-Lite |
| Max output | 66K tokens | — | — |
| Input price / 1M | $0.25 ↗ | $1.25 ↗ | Gemini 3.1 Flash-Lite |
| Output price / 1M | $1.5 ↗ | $2.5 ↗ | Gemini 3.1 Flash-Lite |
| Cached input / 1M | $0.025 ↗ | $0.2 ↗ | Gemini 3.1 Flash-Lite |
| Input + output / 1M Lower is cheaper. List prices; batch, tool and regional fees excluded. | $1.75 | $3.75 | Gemini 3.1 Flash-Lite |
| Modalities | text · vision · audio | text · vision | Gemini 3.1 Flash-Lite |
| Released | 2026-03-03 | 2026-03-09 | — |
| Cited benchmark scores | 10 | 5 | — |
Reliability
Provider status
Last 60 days · refreshed daily on this page · live on /statusMore matchups
Gemini 3.1 Flash-Lite vs …
Models sharing the most benchmarksMore matchups
Grok 4.20 Reasoning vs …
Models sharing the most benchmarksBuilt by Respan
Which one wins on your data?
Public benchmarks are a starting point. Run Gemini 3.1 Flash-Lite and Grok 4.20 Reasoning on your own prompts with Respan evals, or route to either through one gateway key with automatic failover.