Compare / head-to-head
Gemini 3.5 FlashvsSonar Pro
Gemini 3.5 Flash and Sonar Pro do not yet share a public benchmark, so quality cannot be compared apples-to-apples. Gemini 3.5 Flash is 1.7x cheaper per token. Gemini 3.5 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
0
no overlap yet
Cheaper per token
Gemini 3.5 Flash
1.7x cheaper, input + output
Larger context
Gemini 3.5 Flash
1.0M tokens
Provider uptime (30d)
100% · 100%
Google · Perplexity
Gemini 3.5 Flash
Google · released 2026-05-19
textvisionaudio
Quality
Benchmark matrix
0 shared · 15 only Gemini 3.5 Flash · 1 only Sonar Pro| Benchmark | Gemini 3.5 Flash | Sonar Pro | Δ | Edge |
|---|---|---|---|---|
| Reported by both · 0 | ||||
| No public benchmark is reported for both models yet. | ||||
| Only Gemini 3.5 Flash reports · 15 | ||||
| GPQA Diamond | 92.8% ↗epoch | not reported | — | — |
| AIME 2026 | 95% ↗matharena ⚠ | not reported | — | — |
| ARC-AGI-2 | 72.1% ↗ | not reported | — | — |
| FrontierMath Tier 4 v2 (Epoch AI run) | 26.8% ↗epoch | not reported | — | — |
| FrontierMath Tiers 1-3 v2 (Epoch AI run) | 62.8% ↗epoch | not reported | — | — |
| GDPVal-AA | 1656 ↗ | not reported | — | — |
| Humanity's Last Exam (full set, text + MM) | 40.2% ↗ | not reported | — | — |
| MCP Atlas | 83.6% ↗ | not reported | — | — |
| MMMU-Pro | 83.6% ↗ | not reported | — | — |
| OSWorld-Verified | 78.4% ↗ | not reported | — | — |
| OTIS Mock AIME 2024-2025 (Epoch AI run) | 95.6% ↗epoch | not reported | — | — |
| SimpleQA Verified | 66.2% ↗epoch | not reported | — | — |
| SWE-Bench Pro (Public) | 55.1% ↗ | not reported | — | — |
| SWE-bench Verified (Epoch AI run) | 79.3% ↗epoch | not reported | — | — |
| Terminal-bench 2.1 | 76.2% ↗ | not reported | — | — |
| Only Sonar Pro reports · 1 | ||||
| SimpleQA F-score | not reported | 85.8% ↗ | — | — |
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 3.5 Flash minus Sonar Pro 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 3.5 Flash | Sonar Pro | Edge |
|---|---|---|---|
| Context window | 1.0M tokens | 200K tokens | Gemini 3.5 Flash |
| Max output | 66K tokens | — | — |
| Input price / 1M | $1.5 ↗ | $3 ↗ | Gemini 3.5 Flash |
| Output price / 1M | $9 ↗ | $15 ↗ | Gemini 3.5 Flash |
| Cached input / 1M | $0.15 ↗ | — | — |
| Input + output / 1M Lower is cheaper. List prices; batch, tool and regional fees excluded. | $10.5 | $18 | Gemini 3.5 Flash |
| Modalities | text · vision · audio | text | Gemini 3.5 Flash |
| Released | 2026-05-19 | 2025-01-21 | — |
| Cited benchmark scores | 15 | 1 | — |
Reliability
Provider status
Last 60 days · refreshed daily on this page · live on /statusMore matchups
Gemini 3.5 Flash vs …
Models sharing the most benchmarksMore matchups
Sonar Pro vs …
Models sharing the most benchmarksBuilt by Respan
Which one wins on your data?
Public benchmarks are a starting point. Run Gemini 3.5 Flash and Sonar Pro on your own prompts with Respan evals, or route to either through one gateway key with automatic failover.