Compare / head-to-head
DeepSeek R1vsGemini 2.5 Flash
Gemini 2.5 Flash leads 3 of 4 shared benchmarks. Gemini 2.5 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
1 – 3
Gemini 2.5 Flash leads
Cheaper per token
—
list price, input + output
Larger context
Gemini 2.5 Flash
1.0M tokens
Provider uptime (30d)
100% · 100%
DeepSeek · Google
DeepSeek R1
DeepSeek · released 2025-01-20
text
- Context
- 128K
- Max out
- 33K
- Input /1M
- —
- Output /1M
- —
- Cached /1M
- —
- Scores
- 8 · 7 core
Gemini 2.5 Flash
Google · released 2025-06-17
textvisionaudio
Quality
Benchmark matrix
4 shared · 3 only DeepSeek R1 · 4 only Gemini 2.5 Flash| Benchmark | DeepSeek R1 | Gemini 2.5 Flash | Δ | Edge |
|---|---|---|---|---|
| Reported by both · 4 | ||||
| SWE-bench Verified | 49.2% ↗ | 48.9% ↗ | +0.3 pt | DeepSeek R1 |
| GPQA Diamond | 71.5% ↗ | 82.8% ↗ | -11.3 pt | Gemini 2.5 Flash |
| AIME 2025 | 70% ↗matharena | 72% ↗ | -2 pt | Gemini 2.5 Flash |
| LMArena Elo | 1372.6 ↗ | 1417.3 ↗ | -44.7 | Gemini 2.5 Flash |
| Only DeepSeek R1 reports · 3 | ||||
| MMLU | 90.8% ↗ | not reported | — | — |
| MMLU-Pro | 84% ↗ | not reported | — | — |
| OTIS Mock AIME 2024-2025 (Epoch AI run) | 53.3% ↗epoch | not reported | — | — |
| Only Gemini 2.5 Flash reports · 4 | ||||
| Humanity's Last Exam (no tools) | not reported | 11% ↗ | — | — |
| Aider Polyglot | not reported | 56.7% ↗ | — | — |
| LiveCodeBench | not reported | 59.3% ↗ | — | — |
| MMMU | not reported | 79.7% ↗ | — | — |
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 DeepSeek R1 minus Gemini 2.5 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 | DeepSeek R1 | Gemini 2.5 Flash | Edge |
|---|---|---|---|
| Context window | 128K tokens | 1.0M tokens | Gemini 2.5 Flash |
| Max output | 33K tokens | 66K tokens | Gemini 2.5 Flash |
| Input price / 1M | — | $0.3 ↗ | — |
| Output price / 1M | — | $2.5 ↗ | — |
| Cached input / 1M | — | $0.03 ↗ | — |
| Input + output / 1M Lower is cheaper. List prices; batch, tool and regional fees excluded. | — | $2.8 | — |
| Modalities | text | text · vision · audio | Gemini 2.5 Flash |
| Released | 2025-01-20 | 2025-06-17 | — |
| Cited benchmark scores | 8 | 9 | — |
Reliability
Provider status
Last 60 days · refreshed daily on this page · live on /statusMore matchups
DeepSeek R1 vs …
Models sharing the most benchmarksMore matchups
Gemini 2.5 Flash vs …
Models sharing the most benchmarksBuilt by Respan
Which one wins on your data?
Public benchmarks are a starting point. Run DeepSeek R1 and Gemini 2.5 Flash on your own prompts with Respan evals, or route to either through one gateway key with automatic failover.