Pairwise benchmark snapshot · Aug 1, 2026
In this head-to-head showdown, DeepSeek V3 delivers higher overall intelligence and human-preferred responses (Elo 1,310 vs 1,295), while DeepSeek V3 leads in SWE-bench software engineering benchmarks (48.6%), while Gemini 2.5 Flash is more budget-friendly at $0.4/1M per 1M output tokens. Review the complete breakdown below to determine which model best fits your performance and budget requirements.
9 direct benchmark disciplines evaluated across capability, speed, and cost
Prior DeepSeek flagship. Baseline for v3 vs v4.
Previous Google speed workhorse.
Δ 15 Arena Elo pts
185 tok/s
$0.4 / 1M output
Relative percentile scores computed across all active models in the benchmark catalog.
Comparing top Western standard models with China's leading frontier rival across 6 skill dimensions. Tap any spoke or dot to inspect.
Category wins across reasoning intelligence, generation speed, and token cost.
Preference Elo, Coding proficiency, SWE-bench & LiveBench accuracy
Generation throughput and time to first token responsiveness
Cost per million tokens and max context window length
| Benchmark | DeepSeek V3 | Gemini 2.5 Flash | Advantage Delta |
|---|---|---|---|
| Preference Elo | +15 | ||
| LiveBench | +4% | ||
| SWE-bench | +0.6% | ||
| GPQA Diamond | +9.1% | ||
| Time to first token | +270 ms | ||
| Output speed | 66 tok/s | 185 tok/s | +119 tok/s |
| Input price | $0.27/1M | $0.1/1M | +$0.17/1M |
| Output price | $1.1/1M | $0.4/1M | +$0.7/1M |
| Context window | +872k |
Simulate monthly production API costs in USD (US Dollar).
Gemini 2.5 Flash is estimated to save $16.45/month ($197/year).
Higher SWE-bench (48.6%).
Lower output list price ($0.4/1M).
Lower TTFT (110 ms).
Larger window (1M).
Gemini 2.5 Flash is the side marked multimodal in the catalog.
| Target Workload | Recommended Pick | Evaluation Rationale |
|---|---|---|
| Repo / coding agents | DeepSeek V3 | Higher SWE-bench (48.6%). |
| High-volume chat | Gemini 2.5 Flash | Lower output list price ($0.4/1M). |
| Voice / low-latency UI | Gemini 2.5 Flash | Lower TTFT (110 ms). |
| Long-document RAG | Gemini 2.5 Flash | Larger window (1M). |
| Screenshots / vision | Gemini 2.5 Flash | Gemini 2.5 Flash is the side marked multimodal in the catalog. |
No comments posted on this matchup yet. Be the first to share an evaluation note!
Dynamic OpenGraph banner generated at /compare/deepseek-v3-vs-gemini-2-5-flash/opengraph-image
Verified Head-to-Head Telemetry
