# A.X K2 vs DeepSeek V4 Flash 0731 > Side-by-side benchmark comparison for A.X K2 and DeepSeek V4 Flash 0731 across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks. - Canonical page: https://benchlm.ai/compare/a-x-k2-vs-deepseek-v4-flash-0731 - Last updated: September 10, 2026 - Shared sourced benchmarks: 6 - HTML indexing: indexable - Ranking lane: BenchAlign v5 ## Quick Verdict Pick DeepSeek V4 Flash 0731 if you want the stronger benchmark profile. A.X K2 only makes more sense when its price, context window, or workload-specific category wins matter more than the overall score. ## Summary - DeepSeek V4 Flash 0731 leads overall 55 to 49. - The biggest single benchmark swing is Terminal-Bench 2.1 in Agentic, with scores of 36.0% and 82.7%. - A.X K2 is the cheaper option on output tokens, which matters if you expect large responses or heavy interactive use. - DeepSeek V4 Flash 0731 also has the larger context window at 1M. ## Model Snapshot | Property | A.X K2 | DeepSeek V4 Flash 0731 | |----------|----------|----------| | Creator | SK Telecom | DeepSeek | | Type | Open Weight | Proprietary | | Reasoning | Reasoning | Reasoning | | Context | 262K | 1M | | Overall Score | null | null | | Benchmarks Covered | 10 | 40 | | Pricing (input/output) | $0.00 / $0.00 | $0.14 / $0.28 | ## Category Breakdown ### Agentic - Winner: Coming soon - A.X K2 public-lane score: Coming soon - DeepSeek V4 Flash 0731 public-lane score: Coming soon | Benchmark | A.X K2 | DeepSeek V4 Flash 0731 | Winner | |-----------|-----------|-----------|--------| | Terminal-Bench 2.1 | 36.0% | 82.7% | DeepSeek V4 Flash 0731 | | Terminal-Bench 2.0 | Coming soon | 56.9% | Coming soon | | BrowseComp | Coming soon | 73.2% | Coming soon | | HLE w/ tools | Coming soon | 45.1% | Coming soon | | MCP Atlas | Coming soon | 69% | Coming soon | | Toolathlon | Coming soon | 47.8% | Coming soon | | CyberGym | Coming soon | 76.7% | Coming soon | | Toolathlon-Verified | Coming soon | 70.3% | Coming soon | | Agents' Last Exam | Coming soon | 25.2% | Coming soon | | AutomationBench | Coming soon | 25.1% | Coming soon | | Terminal-Bench 2.1 (Vals) | Coming soon | 67.0% | Coming soon | ### Coding - Winner: Coming soon - A.X K2 public-lane score: Coming soon - DeepSeek V4 Flash 0731 public-lane score: Coming soon | Benchmark | A.X K2 | DeepSeek V4 Flash 0731 | Winner | |-----------|-----------|-----------|--------| | LiveCodeBench v6 | 84.0% | Coming soon | Coming soon | | SciCode | 41% | Coming soon | Coming soon | | Terminal-Bench 2.1 | 36.0% | 82.7% | DeepSeek V4 Flash 0731 | | LiveCodeBench Pass@1-COT | Coming soon | 91.6% | Coming soon | | Codeforces | Coming soon | 3052.0 | Coming soon | | SWE-bench Verified | Coming soon | 79% | Coming soon | | SWE-bench Pro | Coming soon | 52.6% | Coming soon | | SWE Multilingual | Coming soon | 73.3% | Coming soon | | Terminal-Bench 2.0 | Coming soon | 56.9% | Coming soon | | NL2Repo | Coming soon | 54.2% | Coming soon | | DeepSWE | Coming soon | 54.4% | Coming soon | | DSBench-FullStack | Coming soon | 68.7% | Coming soon | | DSBench-Hard | Coming soon | 59.6% | Coming soon | | VulcanBench v3 | Coming soon | 88.4% | Coming soon | | OpenHarmony Bench | Coming soon | 53.8% | Coming soon | | LiveCodeBench (Vals) | Coming soon | 87.3% | Coming soon | | SWE-bench (Vals) | Coming soon | 88.8% | Coming soon | ### Reasoning - Winner: Coming soon - A.X K2 public-lane score: Coming soon - DeepSeek V4 Flash 0731 public-lane score: Coming soon | Benchmark | A.X K2 | DeepSeek V4 Flash 0731 | Winner | |-----------|-----------|-----------|--------| | MRCR 1M | Coming soon | 78.7% | Coming soon | | CorpusQA 1M | Coming soon | 60.5% | Coming soon | ### Knowledge - Winner: Coming soon - A.X K2 public-lane score: Coming soon - DeepSeek V4 Flash 0731 public-lane score: Coming soon | Benchmark | A.X K2 | DeepSeek V4 Flash 0731 | Winner | |-----------|-----------|-----------|--------| | HLE | 27.8% | 34.8% | DeepSeek V4 Flash 0731 | | GPQA-D | 85.6% | 88.1% | DeepSeek V4 Flash 0731 | | MMLU-Pro | Coming soon | 86.2% | Coming soon | | SimpleQA | Coming soon | 34.1% | Coming soon | | Chinese-SimpleQA | Coming soon | 78.9% | Coming soon | | GPQA | Coming soon | 88.1% | Coming soon | | GPQA Diamond (Vals) | Coming soon | 89.9% | Coming soon | | MMLU-Pro (Vals) | Coming soon | 86.2% | Coming soon | ### Instruction Following - Winner: Coming soon - A.X K2 public-lane score: Coming soon - DeepSeek V4 Flash 0731 public-lane score: Coming soon | Benchmark | A.X K2 | DeepSeek V4 Flash 0731 | Winner | |-----------|-----------|-----------|--------| | IFBench | 75.9% | Coming soon | Coming soon | ### Mathematics - Winner: Coming soon - A.X K2 public-lane score: Coming soon - DeepSeek V4 Flash 0731 public-lane score: 80 (Unranked ยท 4 rankable rows) | Benchmark | A.X K2 | DeepSeek V4 Flash 0731 | Winner | |-----------|-----------|-----------|--------| | AIME26 | 97.1% | Coming soon | Coming soon | | Apex | 45.8% | 33.0% | A.X K2 | | Apex Shortlist | 88.6% | 85.7% | A.X K2 | | HMMT Feb 2026 | Coming soon | 94.8% | Coming soon | | IMOAnswerBench | Coming soon | 88.4% | Coming soon | ## FAQ ### Which is better overall, A.X K2 or DeepSeek V4 Flash 0731? DeepSeek V4 Flash 0731 is ahead overall on BenchLM right now. ### How many benchmarks does A.X K2 cover on BenchLM? A.X K2 currently has 10 sourced benchmark scores on BenchLM. ### How many benchmarks does DeepSeek V4 Flash 0731 cover on BenchLM? DeepSeek V4 Flash 0731 currently has 40 sourced benchmark scores on BenchLM. ## Related Comparisons - [A.X K2 vs A.X series](/compare/a-x-k2-vs-skt-ax) - [DeepSeek V4 Flash 0731 vs A.X series](/compare/deepseek-v4-flash-0731-vs-skt-ax) - [A.X K2 vs Claude Fable 5.1](/compare/a-x-k2-vs-claude-fable-5-1) - [DeepSeek V4 Flash 0731 vs Claude Fable 5.1](/compare/claude-fable-5-1-vs-deepseek-v4-flash-0731) ## Explore More - [A.X K2 profile](/models/a-x-k2) - [DeepSeek V4 Flash 0731 profile](/models/deepseek-v4-flash-0731) - [Compare Pricing](/llm-pricing) - [Alternative Finder](/tools/alternative-finder) - [LLM Selector](/tools/llm-selector) - [Overall Rankings](/best/overall)