DeepSeek V4 Flash 0731 Benchmarks, Pricing & Speed (BenchLM)

Model information

• API model id: deepseek-v4-flash (0731 update)

• Release: July 31, 2026; type: Proprietary / Reasoning

• Context window: 1M; input modality: text; output modality: text

• Status: active; published Prompt caching price: $0.003 / million cached input tokens

Category scores and rankings

Key benchmark results (official technical report / 0731 update)

Coding

• SWE-bench Verified: 79% (best 96%, Claude Opus 5)

• SWE-bench Pro: 52.6%

• LiveCodeBench Pass@1-COT: 91.6% (just 1.9 points behind V4 Pro 0813's 93.5%)

• Codeforces: 3052.0

• SWE Multilingual: 73.3%

• Terminal-Bench 2.0: 56.9%; Terminal-Bench 2.1: 82.7%

• NL2Repo: 54.2%; deepSwe: 54.4%; DSBench-FullStack: 68.7%; DSBench-Hard: 59.6%

Agentic

• Terminal-Bench 2.0: 56.9%; Terminal-Bench 2.1: 82.7%

• BrowseComp: 73.2%

• HLE w/ tools: 45.1%

• MCP Atlas: 69%; Toolathlon: 47.8%; Toolathlon-Verified: 70.3%

• CyberGym: 76.7%

• Agents' Last Exam: 25.2%

• AutomationBench: 25.1%

Reasoning

• MRCR 1M: 78.7%; CorpusQA 1M: 60.5%

Knowledge

• HLE (Humanity's Last Exam): 34.8%

Key takeaways

• There is still a clear gap versus the strongest benchmark records (for example, it trails Claude Opus 5 by 17 points on SWE-bench Verified), but with a far lower price, its results in coding and agentic scenarios are usable

• The 0731 update shows a significant improvement over the earlier version (deepSwe 7.3 → 54.4 on comparable data)

• BenchLM note: Missing fields remain "not publicly disclosed" rather than being hidden; scores are shown only when supported by public evidence that can be displayed