Head-to-head comparison
Claude Opus 5 vs. DeepSeek-V4-Flash
Compare published benchmark results from matching versions and cohorts, API pricing, and technical specifications. Any documented test setup differences remain visible.
35
shared result series
3
distinct benchmarks
2026-08-16
latest retrieval
Change model selection
Specifications and cost
General specifications and standard API pricing
Undisclosed parameter counts and knowledge cutoffs stay marked as unavailable. The table shows direct standard token pricing, including documented context tiers. Batch, fast, priority, regional surcharges, tool calls, and cloud platform pricing are excluded.
| Attribute | Claude Opus 5 | DeepSeek-V4-Flash |
|---|---|---|
| Provider | Anthropic | DeepSeek |
| Released | Jul 24, 2026 | Apr 24, 2026 |
| Availability | Active | Preview |
| Model type | Proprietary | Open Weights |
| Parameters | Not published | 284B, 13B active |
| Architecture | Not published | Mixture of Experts |
| Context window | 1,000,000 tokens | 1,000,000 tokens |
| Knowledge cutoff | May 2026 | Not published |
| Technical sources | Model, Knowledge cutoff | Model |
| API pricing per 1M tokens | ||
| API input | $5 | $0.14 |
| API output | $25 | $0.28 |
| Cache read | $0.5 | $0. |
| Cache write (5 min.) | $6.25 | Not listed |
| Cache write (1 hr.) | $10 | Not listed |
| Price verified | 07/30/2026Source | 07/30/2026Source |
Claude Opus 5DeepSeek-V4-Flash
API inputUSD per 1M tokens, base tier
Claude Opus 5$5
DeepSeek-V4-Flash$0.14Lower price
API outputUSD per 1M tokens, base tier
Claude Opus 5$25
DeepSeek-V4-Flash$0.28Lower price
Cache readUSD per 1M tokens, base tier
Claude Opus 5$0.5
DeepSeek-V4-Flash$0.003Lower price
Performance
Shared benchmarks
Only published results with the same benchmark version, task, metric, and comparison cohort are paired. Different reasoning levels, agents, harnesses, or output limits appear directly in the table.
35 shared result series
Claude Opus 5DeepSeek-V4-Flash
AlmanBench v0.1Accepted cases. Higher is better. No documented setup difference
Claude Opus 594.947 %Winner
DeepSeek-V4-Flash93.003 %
Arena Text, Style ControlOverall. Higher is better. No documented setup difference
Claude Opus 51,493.745 arena pointsWinner
DeepSeek-V4-Flash1,438.304 arena points
CyberBenchOverall. Higher is better. No documented setup difference
Claude Opus 540.678 %
DeepSeek-V4-Flash66.716 %Winner
Arena Text, Style ControlBusiness, management and finance. Higher is better. No documented setup difference
Claude Opus 51,488.821 arena pointsWinner
DeepSeek-V4-Flash1,435.23 arena points
CyberBenchPatch. Higher is better. No documented setup difference
Claude Opus 581.356 %Winner
DeepSeek-V4-Flash72.414 %
Arena Text, Style ControlChinese. Higher is better. No documented setup difference
Claude Opus 51,575.542 arena pointsWinner
DeepSeek-V4-Flash1,481.177 arena points
CyberBenchPoC. Higher is better. No documented setup difference
Claude Opus 50 %
DeepSeek-V4-Flash61.017 %Winner
Arena Text, Style ControlCoding. Higher is better. No documented setup difference
Claude Opus 51,530.655 arena pointsWinner
DeepSeek-V4-Flash1,479.521 arena points
Arena Text, Style ControlCreative writing. Higher is better. No documented setup difference
Claude Opus 51,478.457 arena pointsWinner
DeepSeek-V4-Flash1,408.648 arena points
Arena Text, Style ControlEnglish. Higher is better. No documented setup difference
Claude Opus 51,494.995 arena pointsWinner
DeepSeek-V4-Flash1,450.015 arena points
Arena Text, Style ControlEntertainment, sports and media. Higher is better. No documented setup difference
Claude Opus 51,466.098 arena pointsWinner
DeepSeek-V4-Flash1,405.113 arena points
Arena Text, Style ControlExcluding ties. Higher is better. No documented setup difference
Claude Opus 51,508.465 arena pointsWinner
DeepSeek-V4-Flash1,435.522 arena points
| Benchmark and task | Claude Opus 5 | DeepSeek-V4-Flash | Comparability | Source |
|---|---|---|---|---|
| AlmanBench v0.1Accepted casesReasoning: max | 94.947 %Winner | 93.003 % | v0.1, results commit f34ddbfaccepted casesHigher is betterCohort: almanbench-v0-1:official:overallNo documented setup differenceWinner: Claude Opus 5Claude Opus 5: Reasoning: max DeepSeek-V4-Flash: Reasoning: max1,029 public tasks with one direct run per row. The target is the Alman language specification. | Alman InstitutType: Independent evaluationLeaderboard updated: 2026-08-05Import ID: curated-alman-institut-2026-08-09-dae32c26388f / curated-alman-institut-2026-08-09-743e705129f5Retrieved 2026-08-09 |
| Arena Text, Style ControlOverallReasoning: high | 1,493.745 arena pointsWinner 95% confidence interval: ±5.332The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result. | 1,438.304 arena points 95% confidence interval: ±4.22The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result. | style-control-v1style-controlled Bradley-Terry ratingHigher is betterCohort: lmarena-text-style-control:2026-08-12:overallNo documented setup differenceWinner: Claude Opus 5Claude Opus 5: Snapshot: claude-opus-5-high, Reasoning: high, Harness: Arena text, style control DeepSeek-V4-Flash: Snapshot: deepseek-v4-flash-high-preview, Reasoning: high, Harness: Arena text, style controlClaude Opus 5: Style-controlled Arena rating from 19,792 anonymous pairwise votes.DeepSeek-V4-Flash: Style-controlled Arena rating from 48,789 anonymous pairwise votes. | ArenaType: Official benchmark leaderboardLeaderboard updated: 2026-08-12Import ID: lmarena-eeedf9209373a7f9b324bfb839e7b02fedacd1e5-1611ed64f3f1Retrieved 2026-08-16 |
| CyberBenchOverall | 40.678 % | 66.716 %Winner | 1accuracyHigher is betterCohort: vals-cyberbench:1:overallNo documented setup differenceWinner: DeepSeek-V4-FlashClaude Opus 5: No further settings disclosed DeepSeek-V4-Flash: No further settings disclosed | Vals AIType: Independent evaluationLeaderboard updated: 2026-08-03Import ID: vals-cyber-2026-08-16-702acaee9aa9Retrieved 2026-08-16 |
| Arena Text, Style ControlBusiness, management and financeReasoning: high | 1,488.821 arena pointsWinner 95% confidence interval: ±10.372The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result. | 1,435.23 arena points 95% confidence interval: ±7.178The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result. | style-control-v1style-controlled Bradley-Terry ratingHigher is betterCohort: lmarena-text-style-control:2026-08-12:industry_business_and_management_and_financial_operationsNo documented setup differenceWinner: Claude Opus 5Claude Opus 5: Snapshot: claude-opus-5-high, Reasoning: high, Harness: Arena text, style control DeepSeek-V4-Flash: Snapshot: deepseek-v4-flash-high-preview, Reasoning: high, Harness: Arena text, style controlClaude Opus 5: Style-controlled Arena rating from 3,811 anonymous pairwise votes.DeepSeek-V4-Flash: Style-controlled Arena rating from 10,055 anonymous pairwise votes. | ArenaType: Official benchmark leaderboardLeaderboard updated: 2026-08-12Import ID: lmarena-eeedf9209373a7f9b324bfb839e7b02fedacd1e5-1611ed64f3f1Retrieved 2026-08-16 |
| CyberBenchPatch | 81.356 %Winner | 72.414 % | 1accuracyHigher is betterCohort: vals-cyberbench:1:patchNo documented setup differenceWinner: Claude Opus 5Claude Opus 5: No further settings disclosed DeepSeek-V4-Flash: No further settings disclosed | Vals AIType: Independent evaluationLeaderboard updated: 2026-08-03Import ID: vals-cyber-2026-08-11-1f20498a3dc1Retrieved 2026-08-11 |
| Arena Text, Style ControlChineseReasoning: high | 1,575.542 arena pointsWinner 95% confidence interval: ±17.296The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result. | 1,481.177 arena points 95% confidence interval: ±12.66The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result. | style-control-v1style-controlled Bradley-Terry ratingHigher is betterCohort: lmarena-text-style-control:2026-08-12:chineseNo documented setup differenceWinner: Claude Opus 5Claude Opus 5: Snapshot: claude-opus-5-high, Reasoning: high, Harness: Arena text, style control DeepSeek-V4-Flash: Snapshot: deepseek-v4-flash-high-preview, Reasoning: high, Harness: Arena text, style controlClaude Opus 5: Style-controlled Arena rating from 1,411 anonymous pairwise votes.DeepSeek-V4-Flash: Style-controlled Arena rating from 2,529 anonymous pairwise votes. | ArenaType: Official benchmark leaderboardLeaderboard updated: 2026-08-12Import ID: lmarena-eeedf9209373a7f9b324bfb839e7b02fedacd1e5-1611ed64f3f1Retrieved 2026-08-16 |
| CyberBenchPoC | 0 % | 61.017 %Winner | 1accuracyHigher is betterCohort: vals-cyberbench:1:pocNo documented setup differenceWinner: DeepSeek-V4-FlashClaude Opus 5: No further settings disclosed DeepSeek-V4-Flash: No further settings disclosed | Vals AIType: Independent evaluationLeaderboard updated: 2026-08-03Import ID: vals-cyber-2026-08-11-1f20498a3dc1Retrieved 2026-08-11 |
| Arena Text, Style ControlCodingReasoning: high | 1,530.655 arena pointsWinner 95% confidence interval: ±8.967The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result. | 1,479.521 arena points 95% confidence interval: ±6.432The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result. | style-control-v1style-controlled Bradley-Terry ratingHigher is betterCohort: lmarena-text-style-control:2026-08-12:codingNo documented setup differenceWinner: Claude Opus 5Claude Opus 5: Snapshot: claude-opus-5-high, Reasoning: high, Harness: Arena text, style control DeepSeek-V4-Flash: Snapshot: deepseek-v4-flash-high-preview, Reasoning: high, Harness: Arena text, style controlClaude Opus 5: Style-controlled Arena rating from 5,388 anonymous pairwise votes.DeepSeek-V4-Flash: Style-controlled Arena rating from 14,353 anonymous pairwise votes. | ArenaType: Official benchmark leaderboardLeaderboard updated: 2026-08-12Import ID: lmarena-eeedf9209373a7f9b324bfb839e7b02fedacd1e5-1611ed64f3f1Retrieved 2026-08-16 |
| Arena Text, Style ControlCreative writingReasoning: high | 1,478.457 arena pointsWinner 95% confidence interval: ±10.296The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result. | 1,408.648 arena points 95% confidence interval: ±7.808The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result. | style-control-v1style-controlled Bradley-Terry ratingHigher is betterCohort: lmarena-text-style-control:2026-08-12:creative_writingNo documented setup differenceWinner: Claude Opus 5Claude Opus 5: Snapshot: claude-opus-5-high, Reasoning: high, Harness: Arena text, style control DeepSeek-V4-Flash: Snapshot: deepseek-v4-flash-high-preview, Reasoning: high, Harness: Arena text, style controlClaude Opus 5: Style-controlled Arena rating from 4,082 anonymous pairwise votes.DeepSeek-V4-Flash: Style-controlled Arena rating from 8,019 anonymous pairwise votes. | ArenaType: Official benchmark leaderboardLeaderboard updated: 2026-08-12Import ID: lmarena-eeedf9209373a7f9b324bfb839e7b02fedacd1e5-1611ed64f3f1Retrieved 2026-08-16 |
| Arena Text, Style ControlEnglishReasoning: high | 1,494.995 arena pointsWinner 95% confidence interval: ±7.427The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result. | 1,450.015 arena points 95% confidence interval: ±5.421The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result. | style-control-v1style-controlled Bradley-Terry ratingHigher is betterCohort: lmarena-text-style-control:2026-08-12:englishNo documented setup differenceWinner: Claude Opus 5Claude Opus 5: Snapshot: claude-opus-5-high, Reasoning: high, Harness: Arena text, style control DeepSeek-V4-Flash: Snapshot: deepseek-v4-flash-high-preview, Reasoning: high, Harness: Arena text, style controlClaude Opus 5: Style-controlled Arena rating from 8,123 anonymous pairwise votes.DeepSeek-V4-Flash: Style-controlled Arena rating from 21,774 anonymous pairwise votes. | ArenaType: Official benchmark leaderboardLeaderboard updated: 2026-08-12Import ID: lmarena-eeedf9209373a7f9b324bfb839e7b02fedacd1e5-1611ed64f3f1Retrieved 2026-08-16 |
| Arena Text, Style ControlEntertainment, sports and mediaReasoning: high | 1,466.098 arena pointsWinner 95% confidence interval: ±9.312The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result. | 1,405.113 arena points 95% confidence interval: ±7.086The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result. | style-control-v1style-controlled Bradley-Terry ratingHigher is betterCohort: lmarena-text-style-control:2026-08-12:industry_entertainment_and_sports_and_mediaNo documented setup differenceWinner: Claude Opus 5Claude Opus 5: Snapshot: claude-opus-5-high, Reasoning: high, Harness: Arena text, style control DeepSeek-V4-Flash: Snapshot: deepseek-v4-flash-high-preview, Reasoning: high, Harness: Arena text, style controlClaude Opus 5: Style-controlled Arena rating from 5,063 anonymous pairwise votes.DeepSeek-V4-Flash: Style-controlled Arena rating from 10,654 anonymous pairwise votes. | ArenaType: Official benchmark leaderboardLeaderboard updated: 2026-08-12Import ID: lmarena-eeedf9209373a7f9b324bfb839e7b02fedacd1e5-1611ed64f3f1Retrieved 2026-08-16 |
| Arena Text, Style ControlExcluding tiesReasoning: high | 1,508.465 arena pointsWinner 95% confidence interval: ±7.043The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result. | 1,435.522 arena points 95% confidence interval: ±5.476The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result. | style-control-v1style-controlled Bradley-Terry ratingHigher is betterCohort: lmarena-text-style-control:2026-08-12:exclude_tiesNo documented setup differenceWinner: Claude Opus 5Claude Opus 5: Snapshot: claude-opus-5-high, Reasoning: high, Harness: Arena text, style control DeepSeek-V4-Flash: Snapshot: deepseek-v4-flash-high-preview, Reasoning: high, Harness: Arena text, style controlClaude Opus 5: Style-controlled Arena rating from 15,069 anonymous pairwise votes.DeepSeek-V4-Flash: Style-controlled Arena rating from 37,085 anonymous pairwise votes. | ArenaType: Official benchmark leaderboardLeaderboard updated: 2026-08-12Import ID: lmarena-eeedf9209373a7f9b324bfb839e7b02fedacd1e5-1611ed64f3f1Retrieved 2026-08-16 |
| Arena Text, Style ControlExpert promptsReasoning: high | 1,539.237 arena pointsWinner 95% confidence interval: ±13.413The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result. | 1,467.529 arena points 95% confidence interval: ±9.251The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result. | style-control-v1style-controlled Bradley-Terry ratingHigher is betterCohort: lmarena-text-style-control:2026-08-12:expertNo documented setup differenceWinner: Claude Opus 5Claude Opus 5: Snapshot: claude-opus-5-high, Reasoning: high, Harness: Arena text, style control DeepSeek-V4-Flash: Snapshot: deepseek-v4-flash-high-preview, Reasoning: high, Harness: Arena text, style controlClaude Opus 5: Style-controlled Arena rating from 2,255 anonymous pairwise votes.DeepSeek-V4-Flash: Style-controlled Arena rating from 4,924 anonymous pairwise votes. | ArenaType: Official benchmark leaderboardLeaderboard updated: 2026-08-12Import ID: lmarena-eeedf9209373a7f9b324bfb839e7b02fedacd1e5-1611ed64f3f1Retrieved 2026-08-16 |
| Arena Text, Style ControlFrenchReasoning: high | 1,500.695 arena pointsWinner 95% confidence interval: ±24.101The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result. | 1,458.295 arena points 95% confidence interval: ±15.946The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result. | style-control-v1style-controlled Bradley-Terry ratingHigher is betterCohort: lmarena-text-style-control:2026-08-12:frenchNo documented setup differenceWinner: Claude Opus 5Claude Opus 5: Snapshot: claude-opus-5-high, Reasoning: high, Harness: Arena text, style control DeepSeek-V4-Flash: Snapshot: deepseek-v4-flash-high-preview, Reasoning: high, Harness: Arena text, style controlClaude Opus 5: Style-controlled Arena rating from 674 anonymous pairwise votes.DeepSeek-V4-Flash: Style-controlled Arena rating from 1,884 anonymous pairwise votes. | ArenaType: Official benchmark leaderboardLeaderboard updated: 2026-08-12Import ID: lmarena-eeedf9209373a7f9b324bfb839e7b02fedacd1e5-1611ed64f3f1Retrieved 2026-08-16 |
| Arena Text, Style ControlGermanReasoning: high | 1,498.048 arena pointsWinner 95% confidence interval: ±35.155The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result. | 1,435.281 arena points 95% confidence interval: ±21.205The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result. | style-control-v1style-controlled Bradley-Terry ratingHigher is betterCohort: lmarena-text-style-control:2026-08-12:germanNo documented setup differenceWinner: Claude Opus 5Claude Opus 5: Snapshot: claude-opus-5-high, Reasoning: high, Harness: Arena text, style control DeepSeek-V4-Flash: Snapshot: deepseek-v4-flash-high-preview, Reasoning: high, Harness: Arena text, style controlClaude Opus 5: Style-controlled Arena rating from 292 anonymous pairwise votes.DeepSeek-V4-Flash: Style-controlled Arena rating from 872 anonymous pairwise votes. | ArenaType: Official benchmark leaderboardLeaderboard updated: 2026-08-12Import ID: lmarena-eeedf9209373a7f9b324bfb839e7b02fedacd1e5-1611ed64f3f1Retrieved 2026-08-16 |
| Arena Text, Style ControlHard promptsReasoning: high | 1,519.69 arena pointsWinner 95% confidence interval: ±6.436The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result. | 1,458.18 arena points 95% confidence interval: ±4.95The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result. | style-control-v1style-controlled Bradley-Terry ratingHigher is betterCohort: lmarena-text-style-control:2026-08-12:hard_promptsNo documented setup differenceWinner: Claude Opus 5Claude Opus 5: Snapshot: claude-opus-5-high, Reasoning: high, Harness: Arena text, style control DeepSeek-V4-Flash: Snapshot: deepseek-v4-flash-high-preview, Reasoning: high, Harness: Arena text, style controlClaude Opus 5: Style-controlled Arena rating from 13,214 anonymous pairwise votes.DeepSeek-V4-Flash: Style-controlled Arena rating from 32,535 anonymous pairwise votes. | ArenaType: Official benchmark leaderboardLeaderboard updated: 2026-08-12Import ID: lmarena-eeedf9209373a7f9b324bfb839e7b02fedacd1e5-1611ed64f3f1Retrieved 2026-08-16 |
| Arena Text, Style ControlHard prompts, EnglishReasoning: high | 1,519.955 arena pointsWinner 95% confidence interval: ±8.892The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result. | 1,464.963 arena points 95% confidence interval: ±6.257The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result. | style-control-v1style-controlled Bradley-Terry ratingHigher is betterCohort: lmarena-text-style-control:2026-08-12:hard_prompts_englishNo documented setup differenceWinner: Claude Opus 5Claude Opus 5: Snapshot: claude-opus-5-high, Reasoning: high, Harness: Arena text, style control DeepSeek-V4-Flash: Snapshot: deepseek-v4-flash-high-preview, Reasoning: high, Harness: Arena text, style controlClaude Opus 5: Style-controlled Arena rating from 5,370 anonymous pairwise votes.DeepSeek-V4-Flash: Style-controlled Arena rating from 15,145 anonymous pairwise votes. | ArenaType: Official benchmark leaderboardLeaderboard updated: 2026-08-12Import ID: lmarena-eeedf9209373a7f9b324bfb839e7b02fedacd1e5-1611ed64f3f1Retrieved 2026-08-16 |
| Arena Text, Style ControlInstruction followingReasoning: high | 1,498.339 arena pointsWinner 95% confidence interval: ±8.058The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result. | 1,434.165 arena points 95% confidence interval: ±6.039The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result. | style-control-v1style-controlled Bradley-Terry ratingHigher is betterCohort: lmarena-text-style-control:2026-08-12:instruction_followingNo documented setup differenceWinner: Claude Opus 5Claude Opus 5: Snapshot: claude-opus-5-high, Reasoning: high, Harness: Arena text, style control DeepSeek-V4-Flash: Snapshot: deepseek-v4-flash-high-preview, Reasoning: high, Harness: Arena text, style controlClaude Opus 5: Style-controlled Arena rating from 7,090 anonymous pairwise votes.DeepSeek-V4-Flash: Style-controlled Arena rating from 16,841 anonymous pairwise votes. | ArenaType: Official benchmark leaderboardLeaderboard updated: 2026-08-12Import ID: lmarena-eeedf9209373a7f9b324bfb839e7b02fedacd1e5-1611ed64f3f1Retrieved 2026-08-16 |
| Arena Text, Style ControlJapanese | 1,481.552 arena pointsHigher measured value 95% confidence interval: ±37.236The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result. | 1,396.126 arena points 95% confidence interval: ±25.789The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result. | style-control-v1style-controlled Bradley-Terry ratingHigher is betterCohort: lmarena-text-style-control:2026-08-12:japaneseTest setup not documented as identicalNo direct winnerClaude Opus 5: Snapshot: claude-opus-5-high, Reasoning: high, Harness: Arena text, style control DeepSeek-V4-Flash: Snapshot: deepseek-v4-flash, Harness: Arena text, style controlClaude Opus 5: Style-controlled Arena rating from 275 anonymous pairwise votes.DeepSeek-V4-Flash: Style-controlled Arena rating from 628 anonymous pairwise votes. | ArenaType: Official benchmark leaderboardLeaderboard updated: 2026-08-12Import ID: lmarena-eeedf9209373a7f9b324bfb839e7b02fedacd1e5-1611ed64f3f1Retrieved 2026-08-16 |
| Arena Text, Style ControlJapaneseReasoning: high | 1,481.552 arena pointsNo clear lead 95% confidence interval: ±37.236The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result. | 1,418.789 arena points 95% confidence interval: ±26.437The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result. | style-control-v1style-controlled Bradley-Terry ratingHigher is betterCohort: lmarena-text-style-control:2026-08-12:japaneseNo documented setup differenceNo clear leadClaude Opus 5: Snapshot: claude-opus-5-high, Reasoning: high, Harness: Arena text, style control DeepSeek-V4-Flash: Snapshot: deepseek-v4-flash-high-preview, Reasoning: high, Harness: Arena text, style controlClaude Opus 5: Style-controlled Arena rating from 275 anonymous pairwise votes.DeepSeek-V4-Flash: Style-controlled Arena rating from 595 anonymous pairwise votes. | ArenaType: Official benchmark leaderboardLeaderboard updated: 2026-08-12Import ID: lmarena-eeedf9209373a7f9b324bfb839e7b02fedacd1e5-1611ed64f3f1Retrieved 2026-08-16 |
| Arena Text, Style ControlKoreanReasoning: high | 1,479.012 arena pointsWinner 95% confidence interval: ±29.274The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result. | 1,375.542 arena points 95% confidence interval: ±21.534The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result. | style-control-v1style-controlled Bradley-Terry ratingHigher is betterCohort: lmarena-text-style-control:2026-08-12:koreanNo documented setup differenceWinner: Claude Opus 5Claude Opus 5: Snapshot: claude-opus-5-high, Reasoning: high, Harness: Arena text, style control DeepSeek-V4-Flash: Snapshot: deepseek-v4-flash-high-preview, Reasoning: high, Harness: Arena text, style controlClaude Opus 5: Style-controlled Arena rating from 438 anonymous pairwise votes.DeepSeek-V4-Flash: Style-controlled Arena rating from 919 anonymous pairwise votes. | ArenaType: Official benchmark leaderboardLeaderboard updated: 2026-08-12Import ID: lmarena-eeedf9209373a7f9b324bfb839e7b02fedacd1e5-1611ed64f3f1Retrieved 2026-08-16 |
| Arena Text, Style ControlLegal and governmentReasoning: high | 1,514.502 arena pointsWinner 95% confidence interval: ±15.318The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result. | 1,458.238 arena points 95% confidence interval: ±10.278The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result. | style-control-v1style-controlled Bradley-Terry ratingHigher is betterCohort: lmarena-text-style-control:2026-08-12:industry_legal_and_governmentNo documented setup differenceWinner: Claude Opus 5Claude Opus 5: Snapshot: claude-opus-5-high, Reasoning: high, Harness: Arena text, style control DeepSeek-V4-Flash: Snapshot: deepseek-v4-flash-high-preview, Reasoning: high, Harness: Arena text, style controlClaude Opus 5: Style-controlled Arena rating from 1,650 anonymous pairwise votes.DeepSeek-V4-Flash: Style-controlled Arena rating from 3,876 anonymous pairwise votes. | ArenaType: Official benchmark leaderboardLeaderboard updated: 2026-08-12Import ID: lmarena-eeedf9209373a7f9b324bfb839e7b02fedacd1e5-1611ed64f3f1Retrieved 2026-08-16 |
| Arena Text, Style ControlLife, physical and social scienceReasoning: high | 1,514.892 arena pointsWinner 95% confidence interval: ±10.683The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result. | 1,461.582 arena points 95% confidence interval: ±7.609The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result. | style-control-v1style-controlled Bradley-Terry ratingHigher is betterCohort: lmarena-text-style-control:2026-08-12:industry_life_and_physical_and_social_scienceNo documented setup differenceWinner: Claude Opus 5Claude Opus 5: Snapshot: claude-opus-5-high, Reasoning: high, Harness: Arena text, style control DeepSeek-V4-Flash: Snapshot: deepseek-v4-flash-high-preview, Reasoning: high, Harness: Arena text, style controlClaude Opus 5: Style-controlled Arena rating from 3,447 anonymous pairwise votes.DeepSeek-V4-Flash: Style-controlled Arena rating from 7,985 anonymous pairwise votes. | ArenaType: Official benchmark leaderboardLeaderboard updated: 2026-08-12Import ID: lmarena-eeedf9209373a7f9b324bfb839e7b02fedacd1e5-1611ed64f3f1Retrieved 2026-08-16 |
| Arena Text, Style ControlLonger queriesReasoning: high | 1,507.154 arena pointsWinner 95% confidence interval: ±7.411The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result. | 1,449.175 arena points 95% confidence interval: ±5.755The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result. | style-control-v1style-controlled Bradley-Terry ratingHigher is betterCohort: lmarena-text-style-control:2026-08-12:longer_queryNo documented setup differenceWinner: Claude Opus 5Claude Opus 5: Snapshot: claude-opus-5-high, Reasoning: high, Harness: Arena text, style control DeepSeek-V4-Flash: Snapshot: deepseek-v4-flash-high-preview, Reasoning: high, Harness: Arena text, style controlClaude Opus 5: Style-controlled Arena rating from 9,479 anonymous pairwise votes.DeepSeek-V4-Flash: Style-controlled Arena rating from 21,682 anonymous pairwise votes. | ArenaType: Official benchmark leaderboardLeaderboard updated: 2026-08-12Import ID: lmarena-eeedf9209373a7f9b324bfb839e7b02fedacd1e5-1611ed64f3f1Retrieved 2026-08-16 |
| Arena Text, Style ControlMathReasoning: high | 1,524.546 arena pointsWinner 95% confidence interval: ±20.219The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result. | 1,440.663 arena points 95% confidence interval: ±12.368The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result. | style-control-v1style-controlled Bradley-Terry ratingHigher is betterCohort: lmarena-text-style-control:2026-08-12:mathNo documented setup differenceWinner: Claude Opus 5Claude Opus 5: Snapshot: claude-opus-5-high, Reasoning: high, Harness: Arena text, style control DeepSeek-V4-Flash: Snapshot: deepseek-v4-flash-high-preview, Reasoning: high, Harness: Arena text, style controlClaude Opus 5: Style-controlled Arena rating from 915 anonymous pairwise votes.DeepSeek-V4-Flash: Style-controlled Arena rating from 2,448 anonymous pairwise votes. | ArenaType: Official benchmark leaderboardLeaderboard updated: 2026-08-12Import ID: lmarena-eeedf9209373a7f9b324bfb839e7b02fedacd1e5-1611ed64f3f1Retrieved 2026-08-16 |
| Arena Text, Style ControlMathematical professionsReasoning: high | 1,540.168 arena pointsWinner 95% confidence interval: ±19.218The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result. | 1,441.422 arena points 95% confidence interval: ±12.404The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result. | style-control-v1style-controlled Bradley-Terry ratingHigher is betterCohort: lmarena-text-style-control:2026-08-12:industry_mathematicalNo documented setup differenceWinner: Claude Opus 5Claude Opus 5: Snapshot: claude-opus-5-high, Reasoning: high, Harness: Arena text, style control DeepSeek-V4-Flash: Snapshot: deepseek-v4-flash-high-preview, Reasoning: high, Harness: Arena text, style controlClaude Opus 5: Style-controlled Arena rating from 1,064 anonymous pairwise votes.DeepSeek-V4-Flash: Style-controlled Arena rating from 2,588 anonymous pairwise votes. | ArenaType: Official benchmark leaderboardLeaderboard updated: 2026-08-12Import ID: lmarena-eeedf9209373a7f9b324bfb839e7b02fedacd1e5-1611ed64f3f1Retrieved 2026-08-16 |
| Arena Text, Style ControlMedicine and healthcareReasoning: high | 1,501.189 arena pointsWinner 95% confidence interval: ±15.955The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result. | 1,463.011 arena points 95% confidence interval: ±10.889The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result. | style-control-v1style-controlled Bradley-Terry ratingHigher is betterCohort: lmarena-text-style-control:2026-08-12:industry_medicine_and_healthcareNo documented setup differenceWinner: Claude Opus 5Claude Opus 5: Snapshot: claude-opus-5-high, Reasoning: high, Harness: Arena text, style control DeepSeek-V4-Flash: Snapshot: deepseek-v4-flash-high-preview, Reasoning: high, Harness: Arena text, style controlClaude Opus 5: Style-controlled Arena rating from 1,529 anonymous pairwise votes.DeepSeek-V4-Flash: Style-controlled Arena rating from 3,505 anonymous pairwise votes. | ArenaType: Official benchmark leaderboardLeaderboard updated: 2026-08-12Import ID: lmarena-eeedf9209373a7f9b324bfb839e7b02fedacd1e5-1611ed64f3f1Retrieved 2026-08-16 |
| Arena Text, Style ControlMulti-turnReasoning: high | 1,490.073 arena pointsWinner 95% confidence interval: ±11.259The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result. | 1,446.059 arena points 95% confidence interval: ±7.528The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result. | style-control-v1style-controlled Bradley-Terry ratingHigher is betterCohort: lmarena-text-style-control:2026-08-12:multi_turnNo documented setup differenceWinner: Claude Opus 5Claude Opus 5: Snapshot: claude-opus-5-high, Reasoning: high, Harness: Arena text, style control DeepSeek-V4-Flash: Snapshot: deepseek-v4-flash-high-preview, Reasoning: high, Harness: Arena text, style controlClaude Opus 5: Style-controlled Arena rating from 3,169 anonymous pairwise votes.DeepSeek-V4-Flash: Style-controlled Arena rating from 8,708 anonymous pairwise votes. | ArenaType: Official benchmark leaderboardLeaderboard updated: 2026-08-12Import ID: lmarena-eeedf9209373a7f9b324bfb839e7b02fedacd1e5-1611ed64f3f1Retrieved 2026-08-16 |
| Arena Text, Style ControlNon-EnglishReasoning: high | 1,486.08 arena pointsWinner 95% confidence interval: ±6.582The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result. | 1,422.674 arena points 95% confidence interval: ±5.146The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result. | style-control-v1style-controlled Bradley-Terry ratingHigher is betterCohort: lmarena-text-style-control:2026-08-12:non_englishNo documented setup differenceWinner: Claude Opus 5Claude Opus 5: Snapshot: claude-opus-5-high, Reasoning: high, Harness: Arena text, style control DeepSeek-V4-Flash: Snapshot: deepseek-v4-flash-high-preview, Reasoning: high, Harness: Arena text, style controlClaude Opus 5: Style-controlled Arena rating from 11,669 anonymous pairwise votes.DeepSeek-V4-Flash: Style-controlled Arena rating from 27,013 anonymous pairwise votes. | ArenaType: Official benchmark leaderboardLeaderboard updated: 2026-08-12Import ID: lmarena-eeedf9209373a7f9b324bfb839e7b02fedacd1e5-1611ed64f3f1Retrieved 2026-08-16 |
| Arena Text, Style ControlPolish | 1,498.593 arena pointsHigher measured value 95% confidence interval: ±33.628The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result. | 1,439.239 arena points 95% confidence interval: ±18.981The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result. | style-control-v1style-controlled Bradley-Terry ratingHigher is betterCohort: lmarena-text-style-control:2026-08-12:polishTest setup not documented as identicalNo direct winnerClaude Opus 5: Snapshot: claude-opus-5-high, Reasoning: high, Harness: Arena text, style control DeepSeek-V4-Flash: Snapshot: deepseek-v4-flash, Harness: Arena text, style controlClaude Opus 5: Style-controlled Arena rating from 305 anonymous pairwise votes.DeepSeek-V4-Flash: Style-controlled Arena rating from 1,007 anonymous pairwise votes. | ArenaType: Official benchmark leaderboardLeaderboard updated: 2026-08-12Import ID: lmarena-eeedf9209373a7f9b324bfb839e7b02fedacd1e5-1611ed64f3f1Retrieved 2026-08-16 |
| Arena Text, Style ControlPolishReasoning: high | 1,498.593 arena pointsWinner 95% confidence interval: ±33.628The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result. | 1,429.767 arena points 95% confidence interval: ±18.83The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result. | style-control-v1style-controlled Bradley-Terry ratingHigher is betterCohort: lmarena-text-style-control:2026-08-12:polishNo documented setup differenceWinner: Claude Opus 5Claude Opus 5: Snapshot: claude-opus-5-high, Reasoning: high, Harness: Arena text, style control DeepSeek-V4-Flash: Snapshot: deepseek-v4-flash-high-preview, Reasoning: high, Harness: Arena text, style controlClaude Opus 5: Style-controlled Arena rating from 305 anonymous pairwise votes.DeepSeek-V4-Flash: Style-controlled Arena rating from 1,019 anonymous pairwise votes. | ArenaType: Official benchmark leaderboardLeaderboard updated: 2026-08-12Import ID: lmarena-eeedf9209373a7f9b324bfb839e7b02fedacd1e5-1611ed64f3f1Retrieved 2026-08-16 |
| Arena Text, Style ControlRussianReasoning: high | 1,498.889 arena pointsWinner 95% confidence interval: ±13.596The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result. | 1,437.146 arena points 95% confidence interval: ±9.061The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result. | style-control-v1style-controlled Bradley-Terry ratingHigher is betterCohort: lmarena-text-style-control:2026-08-12:russianNo documented setup differenceWinner: Claude Opus 5Claude Opus 5: Snapshot: claude-opus-5-high, Reasoning: high, Harness: Arena text, style control DeepSeek-V4-Flash: Snapshot: deepseek-v4-flash-high-preview, Reasoning: high, Harness: Arena text, style controlClaude Opus 5: Style-controlled Arena rating from 2,133 anonymous pairwise votes.DeepSeek-V4-Flash: Style-controlled Arena rating from 5,232 anonymous pairwise votes. | ArenaType: Official benchmark leaderboardLeaderboard updated: 2026-08-12Import ID: lmarena-eeedf9209373a7f9b324bfb839e7b02fedacd1e5-1611ed64f3f1Retrieved 2026-08-16 |
| Arena Text, Style ControlSoftware and IT servicesReasoning: high | 1,524.68 arena pointsWinner 95% confidence interval: ±7.748The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result. | 1,473.269 arena points 95% confidence interval: ±5.679The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result. | style-control-v1style-controlled Bradley-Terry ratingHigher is betterCohort: lmarena-text-style-control:2026-08-12:industry_software_and_it_servicesNo documented setup differenceWinner: Claude Opus 5Claude Opus 5: Snapshot: claude-opus-5-high, Reasoning: high, Harness: Arena text, style control DeepSeek-V4-Flash: Snapshot: deepseek-v4-flash-high-preview, Reasoning: high, Harness: Arena text, style controlClaude Opus 5: Style-controlled Arena rating from 7,730 anonymous pairwise votes.DeepSeek-V4-Flash: Style-controlled Arena rating from 20,086 anonymous pairwise votes. | ArenaType: Official benchmark leaderboardLeaderboard updated: 2026-08-12Import ID: lmarena-eeedf9209373a7f9b324bfb839e7b02fedacd1e5-1611ed64f3f1Retrieved 2026-08-16 |
| Arena Text, Style ControlSpanishReasoning: high | 1,483.936 arena pointsWinner 95% confidence interval: ±27.307The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result. | 1,432.679 arena points 95% confidence interval: ±17.246The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result. | style-control-v1style-controlled Bradley-Terry ratingHigher is betterCohort: lmarena-text-style-control:2026-08-12:spanishNo documented setup differenceWinner: Claude Opus 5Claude Opus 5: Snapshot: claude-opus-5-high, Reasoning: high, Harness: Arena text, style control DeepSeek-V4-Flash: Snapshot: deepseek-v4-flash-high-preview, Reasoning: high, Harness: Arena text, style controlClaude Opus 5: Style-controlled Arena rating from 502 anonymous pairwise votes.DeepSeek-V4-Flash: Style-controlled Arena rating from 1,427 anonymous pairwise votes. | ArenaType: Official benchmark leaderboardLeaderboard updated: 2026-08-12Import ID: lmarena-eeedf9209373a7f9b324bfb839e7b02fedacd1e5-1611ed64f3f1Retrieved 2026-08-16 |
| Arena Text, Style ControlWriting, literature and languageReasoning: high | 1,489.379 arena pointsWinner 95% confidence interval: ±8.922The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result. | 1,421.414 arena points 95% confidence interval: ±6.736The Arena score measures human preference rather than a fixed capability test. The confidence interval and model configuration are part of the result. | style-control-v1style-controlled Bradley-Terry ratingHigher is betterCohort: lmarena-text-style-control:2026-08-12:industry_writing_and_literature_and_languageNo documented setup differenceWinner: Claude Opus 5Claude Opus 5: Snapshot: claude-opus-5-high, Reasoning: high, Harness: Arena text, style control DeepSeek-V4-Flash: Snapshot: deepseek-v4-flash-high-preview, Reasoning: high, Harness: Arena text, style controlClaude Opus 5: Style-controlled Arena rating from 5,451 anonymous pairwise votes.DeepSeek-V4-Flash: Style-controlled Arena rating from 11,864 anonymous pairwise votes. | ArenaType: Official benchmark leaderboardLeaderboard updated: 2026-08-12Import ID: lmarena-eeedf9209373a7f9b324bfb839e7b02fedacd1e5-1611ed64f3f1Retrieved 2026-08-16 |
How to read this comparison
Winning one benchmark is not an overall verdict
Your workload, budget, and required context length matter most. A coding benchmark says little about visual understanding or agent performance.
Prices use official API rates per 1M tokens. Web subscriptions and cloud platform surcharges can differ.
Every result links to its measurement source and retrieval date. Labels distinguish vendor reports, official benchmark leaderboards, and independent evaluations. Disputed or archived results are excluded.
More matchups
Related LLM comparisons
Compare Claude Opus 5 and DeepSeek-V4-Flash with other leading models using the same data and benchmark logic.
View the complete LLM comparison