Compare / head-to-head
Gemini 3.6 FlashvsGrok 4.20 Reasoning
Gemini 3.6 Flash leads 5 of 5 shared benchmarks. Grok 4.20 Reasoning is 1.2x cheaper per token. Gemini 3.6 Flash has the larger context window (1.0M tokens).
Benchmarks from cited public sources; pricing from official pages; status from official provider feeds.
Shared benchmarks
5 – 0
Gemini 3.6 Flash leads
Cheaper per token
Grok 4.20 Reasoning
1.2x cheaper, input + output
Larger context
Gemini 3.6 Flash
1.0M tokens
Provider uptime (30d)
100% · —
Google · xAI
Gemini 3.6 Flash
Google · released 2026-07-21
textvisionaudio
Grok 4.20 Reasoning
xAI · released 2026-03-09
textvision
Quality
Benchmark matrix
5 shared · 9 only Gemini 3.6 Flash · 0 only Grok 4.20 Reasoning| Benchmark | Gemini 3.6 Flash | Grok 4.20 Reasoning | Δ | Edge |
|---|---|---|---|---|
| Reported by both · 5 | ||||
| GPQA Diamond | 94.1% ↗epoch | 89.3% ↗epoch | +4.8 pt | Gemini 3.6 Flash |
| FrontierMath Tier 4 v2 (Epoch AI run) | 22% ↗epoch | 17.1% ↗epoch | +4.9 pt | Gemini 3.6 Flash |
| FrontierMath Tiers 1-3 v2 (Epoch AI run) | 58.9% ↗epoch | 44.9% ↗epoch | +14 pt | Gemini 3.6 Flash |
| OTIS Mock AIME 2024-2025 (Epoch AI run) | 94.2% ↗epoch | 92.2% ↗epoch | +2 pt | Gemini 3.6 Flash |
| SimpleQA Verified | 66.2% ↗epoch | 30.2% ↗epoch | +36 pt | Gemini 3.6 Flash |
| Only Gemini 3.6 Flash reports · 9 | ||||
| AIME 2026 | 96.7% ↗matharena ⚠ | not reported | — | — |
| CharXiv Reasoning (no tools) | 85.2% ↗ | not reported | — | — |
| DeepSWE v1.1 | 49% ↗ | not reported | — | — |
| GDM-MRCR v2 (128k average) | 91.8% ↗ | not reported | — | — |
| GDPVal-AA v2 | 1421 ↗ | not reported | — | — |
| MLE-Bench | 63.9% ↗ | not reported | — | — |
| OSWorld-Verified | 83% ↗ | not reported | — | — |
| SWE-Bench Pro (Public) | 58.7% ↗ | not reported | — | — |
| Terminal-bench 2.1 | 78% ↗ | not reported | — | — |
| Only Grok 4.20 Reasoning reports · 0 | ||||
| Grok 4.20 Reasoning reports nothing Gemini 3.6 Flash does not. | ||||
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 3.6 Flash 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 3.6 Flash | Grok 4.20 Reasoning | Edge |
|---|---|---|---|
| Context window | 1.0M tokens | 1M tokens | Gemini 3.6 Flash |
| Max output | 66K tokens | — | — |
| Input price / 1M | $0.75 ↗ | $1.25 ↗ | Gemini 3.6 Flash |
| Output price / 1M | $3.75 ↗ | $2.5 ↗ | Grok 4.20 Reasoning |
| Cached input / 1M | $0.075 ↗ | $0.2 ↗ | Gemini 3.6 Flash |
| Input + output / 1M Lower is cheaper. List prices; batch, tool and regional fees excluded. | $4.5 | $3.75 | Grok 4.20 Reasoning |
| Modalities | text · vision · audio | text · vision | Gemini 3.6 Flash |
| Released | 2026-07-21 | 2026-03-09 | — |
| Cited benchmark scores | 14 | 5 | — |
Reliability
Provider status
Last 60 days · refreshed daily on this page · live on /statusMore matchups
Gemini 3.6 Flash 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 3.6 Flash and Grok 4.20 Reasoning on your own prompts with Respan evals, or route to either through one gateway key with automatic failover.