DeepSeek V4 Flash vs Claude Opus 4.8
Side-by-side comparison across metrics, pricing, and overall score — every value traced to a source.
Verdict: DeepSeek V4 Flash ranks highest overall (#1) with a score of 70.9.
The best choice still depends on which metrics matter for your workload — per-metric winners are marked below.
What the numbers hide
Computed from the published values below — no estimates, no generated claims.
Fragile verdict
The overall winner flips to Claude Opus 4.8 if SWE-Bench Pro Score is weighted at 100% (it counts for 29% today). If swe-bench pro score drives your decision, the ranking above may not be your ranking.
What nobody reports
SWE-Bench Pro Score (1 of 2 missing) — the questions worth asking vendors directly.
AI hot take
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| Metric | DeepSeek V4 FlashDeepSeek | Claude Opus 4.8Anthropic |
|---|---|---|
| Overall OptiSift Score | 70.9#1 | 56.0#2 |
| Input Price | $0.14 | $5 |
| Output Price | $0.28 | $25 |
| Cache Read Price | $0 | $0.5 |
| Context Window | 1M | 1M |
| Max Output Tokens | 384K | 128K |
| SWE-Bench Pro Score | — | 69.2% |
| Tool Calling | Yes | Yes |
| Extended Reasoning | Yes | Yes |
About these models
#1DeepSeek V4 Flash
DeepSeek
DeepSeek V4 Flash is DeepSeek's reasoning-capable model: $0.14/$0.28 per 1M input/output tokens, 1M token context window.
#2Claude Opus 4.8
Anthropic
Claude Opus 4.8 is Anthropic's reasoning-capable model: $5/$25 per 1M input/output tokens, 1M token context window, 69.2% on SWE-Bench Pro.