Compare · ModelsLive · 2 picked · head to head
Claude Sonnet 4.5 vs DeepSeek V4 Flash
Side by side · benchmarks, pricing, and signals you can act on.
Winner summary
DeepSeek V4 Flash wins on 0/0 benchmarks
Not enough overlapping benchmarks to declare a winner yet · Claude Sonnet 4.5 · DeepSeek V4 Flash are still filling in scores.
Hype vs Reality
Attention vs performance
Claude Sonnet 4.5
#174 by perf·no signal
DeepSeek V4 Flash
#31 by perf·no signal
Best value
DeepSeek V4 Flash
121.2x better value than Claude Sonnet 4.5
Claude Sonnet 4.5
4.4 pts/$
$9.00/M
DeepSeek V4 Flash
533.3 pts/$
$0.13/M
Vendor risk
Mixed exposure
One or more vendors flagged
Anthropic
$380.0B·Tier 1
DeepSeek
$3.4B·Tier 1
Pricing · per 1M tokens · projected $/mo at 10M tokens
| Model | Input | Output | Context | Projected $/mo |
|---|---|---|---|---|
| $3.00 | $15.00 | 1.0M tokens (~500 books) | $60.00 | |
| $0.08 | $0.17 | 1.0M tokens (~524 books) | $1.05 |
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