Compare / head-to-head
Gemini 3.1 Pro PreviewvsGemini 3 Flash Preview
Gemini 3.1 Pro Preview leads 4 of 5 shared benchmarks. Both offer a 1.0M-token context window.
Benchmarks from cited public sources; pricing from official pages; status from official provider feeds.
Shared benchmarks
4 – 0
Gemini 3.1 Pro Preview leads · 1 tied
Cheaper per token
—
list price, 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 Flash Preview
Google · released 2025-12-17
textvisionaudio
- Context
- 1.0M
- Max out
- 66K
- Input /1M
- —
- Output /1M
- —
- Cached /1M
- —
- Scores
- 13 · 9 core
Quality
Benchmark matrix
5 shared · 4 only Gemini 3.1 Pro Preview · 6 only Gemini 3 Flash Preview| Benchmark | Gemini 3.1 Pro Preview | Gemini 3 Flash Preview | Δ | Edge |
|---|---|---|---|---|
| Reported by both · 5 | ||||
| GPQA Diamond | 94.3% ↗ | 90.4% ↗ | +3.9 pt | Gemini 3.1 Pro Preview |
| FrontierMath Tier 4 v2 (Epoch AI run) | 26.8% ↗epoch | 17.1% ↗epoch | +9.7 pt | Gemini 3.1 Pro Preview |
| FrontierMath Tiers 1-3 v2 (Epoch AI run) | 59.6% ↗epoch | 51.2% ↗epoch | +8.4 pt | Gemini 3.1 Pro Preview |
| OTIS Mock AIME 2024-2025 (Epoch AI run) | 95.6% ↗epoch | 95.6% ↗epoch | 0 | Tie |
| SimpleQA Verified | 73.5% ↗epoch | 68.7% ↗ | +4.8 pt | Gemini 3.1 Pro Preview |
| Only Gemini 3.1 Pro Preview reports · 4 | ||||
| AIME 2026 | 98.3% ↗matharena ⚠ | not reported | — | — |
| LMArena Elo | 1480.1 ↗ | not reported | — | — |
| ARC-AGI-2 | 77.1% ↗ | not reported | — | — |
| SWE-Bench Pro | 54.2% ↗ | not reported | — | — |
| Only Gemini 3 Flash Preview reports · 6 | ||||
| SWE-bench Verified | not reported | 78% ↗ | — | — |
| AIME 2025 | not reported | 95.2% ↗ | — | — |
| Humanity's Last Exam (no tools) | not reported | 33.7% ↗ | — | — |
| MMMU-Pro | not reported | 81.2% ↗ | — | — |
| SWE-bench Verified (Epoch AI run) | not reported | 75.4% ↗epoch | — | — |
| Terminal-Bench 2.0 | not reported | 47.6% ↗ | — | — |
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 Flash Preview 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 Flash Preview | Edge |
|---|---|---|---|
| Context window | 1.0M tokens | 1.0M tokens | Tie |
| Max output | 66K tokens | 66K tokens | Tie |
| Input price / 1M | $2 ↗ | — | — |
| Output price / 1M | $12 ↗ | — | — |
| Cached input / 1M | $0.2 ↗ | — | — |
| Input + output / 1M Lower is cheaper. List prices; batch, tool and regional fees excluded. | $14 | — | — |
| Modalities | text · vision · audio | text · vision · audio | Tie |
| Released | 2026-02-19 | 2025-12-17 | — |
| Cited benchmark scores | 10 | 13 | — |
Reliability
Google status
Last 60 days · refreshed daily on this page · live on /statusMore matchups
Gemini 3.1 Pro Preview vs …
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Gemini 3 Flash Preview vs …
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Which one wins on your data?
Public benchmarks are a starting point. Run Gemini 3.1 Pro Preview and Gemini 3 Flash Preview on your own prompts with Respan evals, or route to either through one gateway key with automatic failover.