Pairwise benchmark snapshot · Aug 16, 2026
In this head-to-head showdown, DeepSeek V4 Flash delivers higher overall intelligence and human-preferred responses (Elo 1,490 vs 1,295), while DeepSeek V4 Flash leads in SWE-bench software engineering benchmarks (71.2%), while DeepSeek V4 Flash is more budget-friendly at $0.28/1M per 1M output tokens, while Gemini 2.5 Flash provides faster response streaming (185 tok/s). 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
DeepSeek Jul 31 2026 price-performance SKU. Public listings put it near $0.14/$0.28 per 1M tokens.
Previous Google speed workhorse.
Currently comparing DeepSeek V4 Flash vs Gemini 2.5 Flash. Alternative family tiers available.
Δ 195 Arena Elo pts
185 tok/s
$0.28 / 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 V4 Flash | Gemini 2.5 Flash | Advantage Delta |
|---|---|---|---|
| Preference Elo | +195 | ||
| Coding Elo | — | — | |
| LiveBench | +16.4% | ||
| SWE-bench | +23.2% | ||
| GPQA Diamond | +13.4% | ||
| Time to first token | +55 ms | ||
| Output speed | 142 tok/s | 185 tok/s | +43 tok/s |
| Input price | $0.14/1M | $0.1/1M | +$0.04/1M |
| Output price | $0.28/1M | $0.4/1M | +$0.12/1M |
| Context window | +840k |
Simulate monthly production API costs in USD (US Dollar).
DeepSeek V4 Flash is estimated to save $0.40/month ($5/year).
Higher SWE-bench (71.2%).
Lower output list price ($0.28/1M).
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 V4 Flash | Higher SWE-bench (71.2%). |
| High-volume chat | DeepSeek V4 Flash | Lower output list price ($0.28/1M). |
| 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. |
Public listings put Flash near $0.14/$0.28 per 1M. That is a batch SKU, not a chatbot crown.
Useful as a cheap historical compare. 3.7 Flash is the 2026 volume SKU.
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