Compare / head-to-head
Claude Sonnet 4.5vsGemini 3 Flash Preview
Gemini 3 Flash Preview leads 9 of 10 shared benchmarks. Gemini 3 Flash Preview 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 – 9
Gemini 3 Flash Preview leads
Cheaper per token
—
list price, input + output
Larger context
Gemini 3 Flash Preview
1.0M tokens
Provider uptime (30d)
100% · 100%
Anthropic · Google
Claude Sonnet 4.5
Anthropic · released 2025-09-29
textvision
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
10 shared · 10 only Claude Sonnet 4.5 · 1 only Gemini 3 Flash Preview| Benchmark | Claude Sonnet 4.5 | Gemini 3 Flash Preview | Δ | Edge |
|---|---|---|---|---|
| Reported by both · 10 | ||||
| SWE-bench Verified | 77.2% ↗ | 78% ↗ | -0.8 pt | Gemini 3 Flash Preview |
| GPQA Diamond | 83.4% ↗ | 90.4% ↗ | -7 pt | Gemini 3 Flash Preview |
| AIME 2025 | 84.2% ↗matharena ⚠ | 95.2% ↗ | -11 pt | Gemini 3 Flash Preview |
| Humanity's Last Exam (no tools) | 17.7% ↗ | 33.7% ↗ | -16 pt | Gemini 3 Flash Preview |
| FrontierMath Tier 4 v2 (Epoch AI run) | 2.4% ↗epoch | 17.1% ↗epoch | -14.7 pt | Gemini 3 Flash Preview |
| FrontierMath Tiers 1-3 v2 (Epoch AI run) | 23.9% ↗epoch | 51.2% ↗epoch | -27.3 pt | Gemini 3 Flash Preview |
| OTIS Mock AIME 2024-2025 (Epoch AI run) | 77.8% ↗epoch | 95.6% ↗epoch | -17.8 pt | Gemini 3 Flash Preview |
| SimpleQA Verified | 30.7% ↗epoch | 68.7% ↗ | -38 pt | Gemini 3 Flash Preview |
| SWE-bench Verified (Epoch AI run) | 71.3% ↗epoch | 75.4% ↗epoch | -4.1 pt | Gemini 3 Flash Preview |
| Terminal-Bench 2.0 | 51% ↗ | 47.6% ↗ | +3.4 pt | Claude Sonnet 4.5 |
| Only Claude Sonnet 4.5 reports · 10 | ||||
| ARC-AGI-2 (Verified) | 13.6% ↗ | not reported | — | — |
| GDPval-AA | 1276 ↗ | not reported | — | — |
| Humanity's Last Exam (with tools) | 33.6% ↗ | not reported | — | — |
| MCP Atlas | 43.8% ↗ | not reported | — | — |
| MMMLU | 89.5% ↗ | not reported | — | — |
| MMMU-Pro (no tools) | 63.4% ↗ | not reported | — | — |
| MMMU-Pro (with tools) | 68.9% ↗ | not reported | — | — |
| OSWorld-Verified | 61.4% ↗ | not reported | — | — |
| Tau2-bench Retail | 86.2% ↗ | not reported | — | — |
| Tau2-bench Telecom | 98% ↗ | not reported | — | — |
| Only Gemini 3 Flash Preview reports · 1 | ||||
| MMMU-Pro | not reported | 81.2% ↗ | — | — |
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 Claude Sonnet 4.5 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 | Claude Sonnet 4.5 | Gemini 3 Flash Preview | Edge |
|---|---|---|---|
| Context window | 200K tokens | 1.0M tokens | Gemini 3 Flash Preview |
| Max output | 64K tokens | 66K tokens | Gemini 3 Flash Preview |
| Input price / 1M | $3 ↗ | — | — |
| Output price / 1M | $15 ↗ | — | — |
| Cached input / 1M | $0.3 ↗ | — | — |
| Input + output / 1M Lower is cheaper. List prices; batch, tool and regional fees excluded. | $18 | — | — |
| Modalities | text · vision | text · vision · audio | Gemini 3 Flash Preview |
| Released | 2025-09-29 | 2025-12-17 | — |
| Cited benchmark scores | 21 | 13 | — |
Reliability
Provider status
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