Compare / head-to-head
Gemini 3.1 Pro PreviewvsGemini 3.6 Flash
Gemini 3.1 Pro Preview leads 6 of 6 shared benchmarks. Gemini 3.6 Flash is 3.1x cheaper per token. Both offer a 1.0M-token context window.
Benchmarks from cited public sources; pricing from official pages; status from official provider feeds.
Shared benchmarks
6 – 0
Gemini 3.1 Pro Preview leads
Cheaper per token
Gemini 3.6 Flash
3.1x cheaper, input + output
Larger context
Tie
both 1.0M tokens
Provider uptime (30d)
100%
Google
Gemini 3.1 Pro Preview
Google · released 2026-02-19
textvisionaudio
Gemini 3.6 Flash
Google · released 2026-07-21
textvisionaudio
Quality
Benchmark matrix
6 shared · 3 only Gemini 3.1 Pro Preview · 8 only Gemini 3.6 Flash| Benchmark | Gemini 3.1 Pro Preview | Gemini 3.6 Flash | Δ | Edge |
|---|---|---|---|---|
| Reported by both · 6 | ||||
| GPQA Diamond | 94.3% ↗ | 94.1% ↗epoch | +0.2 pt | Gemini 3.1 Pro Preview |
| AIME 2026 | 98.3% ↗matharena ⚠ | 96.7% ↗matharena ⚠ | +1.6 pt | Gemini 3.1 Pro Preview |
| FrontierMath Tier 4 v2 (Epoch AI run) | 26.8% ↗epoch | 22% ↗epoch | +4.8 pt | Gemini 3.1 Pro Preview |
| FrontierMath Tiers 1-3 v2 (Epoch AI run) | 59.6% ↗epoch | 58.9% ↗epoch | +0.7 pt | Gemini 3.1 Pro Preview |
| OTIS Mock AIME 2024-2025 (Epoch AI run) | 95.6% ↗epoch | 94.2% ↗epoch | +1.4 pt | Gemini 3.1 Pro Preview |
| SimpleQA Verified | 73.5% ↗epoch | 66.2% ↗epoch | +7.3 pt | Gemini 3.1 Pro Preview |
| Only Gemini 3.1 Pro Preview reports · 3 | ||||
| LMArena Elo | 1480.1 ↗ | not reported | — | — |
| ARC-AGI-2 | 77.1% ↗ | not reported | — | — |
| SWE-Bench Pro | 54.2% ↗ | not reported | — | — |
| Only Gemini 3.6 Flash reports · 8 | ||||
| CharXiv Reasoning (no tools) | not reported | 85.2% ↗ | — | — |
| DeepSWE v1.1 | not reported | 49% ↗ | — | — |
| GDM-MRCR v2 (128k average) | not reported | 91.8% ↗ | — | — |
| GDPVal-AA v2 | not reported | 1421 ↗ | — | — |
| MLE-Bench | not reported | 63.9% ↗ | — | — |
| OSWorld-Verified | not reported | 83% ↗ | — | — |
| SWE-Bench Pro (Public) | not reported | 58.7% ↗ | — | — |
| Terminal-bench 2.1 | not reported | 78% ↗ | — | — |
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 Pro Preview minus Gemini 3.6 Flash 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 Pro Preview | Gemini 3.6 Flash | Edge |
|---|---|---|---|
| Context window | 1.0M tokens | 1.0M tokens | Tie |
| Max output | 66K tokens | 66K tokens | Tie |
| Input price / 1M | $2 ↗ | $0.75 ↗ | Gemini 3.6 Flash |
| Output price / 1M | $12 ↗ | $3.75 ↗ | Gemini 3.6 Flash |
| Cached input / 1M | $0.2 ↗ | $0.075 ↗ | Gemini 3.6 Flash |
| Input + output / 1M Lower is cheaper. List prices; batch, tool and regional fees excluded. | $14 | $4.5 | Gemini 3.6 Flash |
| Modalities | text · vision · audio | text · vision · audio | Tie |
| Released | 2026-02-19 | 2026-07-21 | — |
| Cited benchmark scores | 10 | 14 | — |
Reliability
Google status
Last 60 days · refreshed daily on this page · live on /statusMore matchups
Gemini 3.1 Pro Preview vs …
Models sharing the most benchmarksMore matchups
Gemini 3.6 Flash vs …
Models sharing the most benchmarksBuilt by Respan
Which one wins on your data?
Public benchmarks are a starting point. Run Gemini 3.1 Pro Preview and Gemini 3.6 Flash on your own prompts with Respan evals, or route to either through one gateway key with automatic failover.