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 1,470), 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. 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.
ByteDance flagship enterprise model with ultra-low token cost and 128k context.
Currently comparing DeepSeek V4 Flash vs Doubao Pro 1.5. Alternative family tiers available.
Δ 20 Arena Elo pts
142 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 | Doubao Pro 1.5 | Advantage Delta |
|---|---|---|---|
| Preference Elo | +20 | ||
| Coding Elo | +51 | ||
| LiveBench | +3.8% | ||
| SWE-bench | +9.1% | ||
| GPQA Diamond | +4.1% | ||
| Time to first token | +25 ms | ||
| Output speed | 142 tok/s | 105 tok/s | +37 tok/s |
| Input price | $0.14/1M | $0.11/1M | +$0.03/1M |
| Output price | $0.28/1M | $0.28/1M | — |
| Context window | +1.2M |
Simulate monthly production API costs in USD (US Dollar).
Doubao Pro 1.5 is estimated to save $1.05/month ($13/year).
Higher SWE-bench (71.2%).
Lower output list price ($0.28/1M).
Lower TTFT (165 ms).
Larger window (1.3M).
Doubao Pro 1.5 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 | DeepSeek V4 Flash | Lower TTFT (165 ms). |
| Long-document RAG | DeepSeek V4 Flash | Larger window (1.3M). |
| Screenshots / vision | Doubao Pro 1.5 | Doubao Pro 1.5 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-doubao-1-5-pro-128k/opengraph-image
Verified Head-to-Head Telemetry
