DeepSeek V4 Flash 0420 (High) vs GPT-5.6 Luna (Medium)
Which is better for the money: DeepSeek V4 Flash 0420 (High) by DeepSeek or GPT-5.6 Luna (Medium) by OpenAI? Intelligence, total benchmark cost, and end-to-end time from Artificial Analysis & other sources, snapshot 2026-10-26.
Clear winner
Verdict
Pick GPT-5.6 Luna (Medium)
GPT-5.6 Luna (Medium) vs DeepSeek V4 Flash 0420 (High): 2.5% more intelligence, 63.4% less cost to run the AA benchmark, and end-to-end time not fully reported.
| Metric | DeepSeek V4 Flash 0420 (High) | GPT-5.6 Luna (Medium) | Difference |
|---|---|---|---|
| Intelligence (higher is better) | 24.4 | 25.0 | +2.5% GPT-5.6 Luna (Medium) is 2.5% more intelligent |
| Total AA cost (lower is better) | $121.20 | $44.32 | −63.4% GPT-5.6 Luna (Medium) is 63.4% cheaper |
| End-to-end time (lower is better) | Not reported | 6.50s | — not comparable |
| Price per 1M tokens (in / out) | $0.11 / $0.23 | $0.20 / $1.20 | |
| Input modalities | Text | Text, Image |
Today's Pareto frontier
Against the frontier
- DeepSeek V4 Flash 0420 (High) is off the frontier: at the same or lower cost, MiMo-V2.6-Flash scores 37.90 for $110.
- GPT-5.6 Luna (Medium) is off the frontier: at the same or lower cost, GPT-6 Luna (Medium) scores 29.90 for $31.2.
DeepSeek V4 Flash 0420 (High)GPT-5.6 Luna (Medium)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/deepseek-v4-flash-0420-high/gpt-5-6-luna-medium · Markdown: /api/v1/compare/deepseek-v4-flash-0420-high/gpt-5-6-luna-medium?format=md · llms.txt · agent skill