Claude Opus 5 (Medium) vs DeepSeek V4.1 Flash (Max)
Which is better for the money: Claude Opus 5 (Medium) by Anthropic or DeepSeek V4.1 Flash (Max) by DeepSeek? Intelligence, total benchmark cost, and end-to-end time from Artificial Analysis & other sources, snapshot 2026-10-25.
Trade-off
Verdict
Depends on your budget
Claude Opus 5 (Medium) scores 5.3 points higher (44.8 vs 39.5) but costs 4.1× as much to run the benchmark ($2732 vs $672; flagship vs premium cost classes). They are not alternatives at one budget: pick Claude Opus 5 (Medium) when you need intelligence above 39.5, and DeepSeek V4.1 Flash (Max) when 39.5 is enough.
| Metric | Claude Opus 5 (Medium) | DeepSeek V4.1 Flash (Max) | Difference |
|---|---|---|---|
| Intelligence (higher is better) | 44.8 | 39.5 | −11.8% DeepSeek V4.1 Flash (… is 11.8% less intelligent |
| Total AA cost (lower is better) | $2,731.91 | $671.96 | −75.4% DeepSeek V4.1 Flash (… is 75.4% cheaper |
| End-to-end time (lower is better) | 12.70s | 14.98s | +18.0% DeepSeek V4.1 Flash (… is 18.0% slower |
| Price per 1M tokens (in / out) | $5.00 / $25.0 | $0.29 / $1.20 | |
| Input modalities | Text, Image | Text, Image |
DeepSeek V4.1 Flash (Max) vs Claude Opus 5 (Medium): 11.8% less intelligence, 75.4% less cost to run the AA benchmark, and 18.0% slower end-to-end.
Today's Pareto frontier
Against the frontier
- Claude Opus 5 (Medium) is off the frontier: at the same or lower cost, Claude Opus 5.5 (High, Default Fallback) scores 53.60 for $2172.
- DeepSeek V4.1 Flash (Max) is off the frontier: at the same or lower cost, GPT-6.1 Sol (Xhigh) scores 51.00 for $662.
Claude Opus 5 (Medium)DeepSeek V4.1 Flash (Max)Today's Pareto frontierOpen-weights frontierEvery other model
Matchup
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Accept: text/markdown or ?format=md returns this page as Markdown. JSON: /api/v1/compare/claude-opus-5-medium/deepseek-v4-1-flash · Markdown: /api/v1/compare/claude-opus-5-medium/deepseek-v4-1-flash?format=md · llms.txt · agent skill