Claude Sonnet 5.5 vs DeepSeek V4.1 Flash
Rank, tier, score and price side by side, from our weekly rankings. Scores are editorial opinion based on public sources.
A
Claude Sonnet 5.5
B
DeepSeek V4.1 Flash
- ProviderAnthropicDeepSeek
- Rank#3Higher rank#17
- TierSS
- Score92.9Higher score85.7
- Price$2 input / $10 output per 1M tokens (API); cache reads $0.20 per 1MAPI $0.30 input / $1.20 output per 1M tokens at peak ($0.15 / $0.60 off-peak); MIT open weightsLower price tier
- TaglineAnthropic's faster, lower-cost Claude 5.5 model for coding, agents, and everyday knowledge work.DeepSeek's September 2026 Flash model on a new architecture, adding native image understanding and a 1M-token context at lower API prices.
| Attribute | Claude Sonnet 5.5 | DeepSeek V4.1 Flash |
|---|---|---|
| Provider | Anthropic | DeepSeek |
| Rank | #3Higher rank | #17 |
| Tier | S | S |
| Score | 92.9Higher score | 85.7 |
| Price | $2 input / $10 output per 1M tokens (API); cache reads $0.20 per 1M | API $0.30 input / $1.20 output per 1M tokens at peak ($0.15 / $0.60 off-peak); MIT open weightsLower price tier |
| Tagline | Anthropic's faster, lower-cost Claude 5.5 model for coding, agents, and everyday knowledge work. | DeepSeek's September 2026 Flash model on a new architecture, adding native image understanding and a 1M-token context at lower API prices. |