Pairwise benchmark snapshot · Aug 17, 2026
In this head-to-head showdown, DeepSeek V4 Flash delivers higher overall intelligence and human-preferred responses (Elo 1,490 vs 1,475), while DeepSeek V4 Flash leads in SWE-bench software engineering benchmarks (71.2%), while Yi-Lightning is more budget-friendly at $0.14/1M per 1M output tokens, while DeepSeek V4 Flash provides faster response streaming (142 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.
01.AI ultra-fast reasoning model delivering top LiveBench efficiency.
Currently comparing DeepSeek V4 Flash vs Yi-Lightning. Alternative family tiers available.
Δ 15 Arena Elo pts
142 tok/s
$0.14 / 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 | Yi-Lightning | Advantage Delta |
|---|---|---|---|
| Preference Elo | +15 | ||
| Coding Elo | +36 | ||
| LiveBench | +2.8% | ||
| SWE-bench | +7.8% | ||
| GPQA Diamond | +3.6% | ||
| Time to first token | +15 ms | ||
| Output speed | 142 tok/s | 130 tok/s | +12 tok/s |
| Input price | $0.14/1M | $0.14/1M | — |
| Output price | $0.28/1M | $0.14/1M | +$0.14/1M |
| Context window | +1.3M |
Simulate monthly production API costs in USD (US Dollar).
Yi-Lightning is estimated to save $2.10/month ($25/year).
Higher SWE-bench (71.2%).
Lower output list price ($0.14/1M).
Lower TTFT (150 ms).
Larger window (1.3M).
DeepSeek V4 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 | Yi-Lightning | Lower output list price ($0.14/1M). |
| Voice / low-latency UI | Yi-Lightning | Lower TTFT (150 ms). |
| Long-document RAG | DeepSeek V4 Flash | Larger window (1.3M). |
| Screenshots / vision | DeepSeek V4 Flash | DeepSeek V4 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-v4-flash-vs-yi-lightning/opengraph-image
Verified Head-to-Head Telemetry
