Claude Sonnet 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
B
DeepSeek V4.1 Flash
- ProviderAnthropicDeepSeek
- Rank#20#17Higher rank
- TierASHigher tier
- Score84.885.7Higher score
- PriceAPI $2 input / $10 output per 1M tokens (legacy model)API $0.30 input / $1.20 output per 1M tokens at peak ($0.15 / $0.60 off-peak); MIT open weightsLower price tier
- TaglineAnthropic's June 2026 Sonnet model for large-scale coding and agentic work, now a legacy model succeeded by Sonnet 5.5 (September 2026) at the same price.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 | DeepSeek V4.1 Flash |
|---|---|---|
| Provider | Anthropic | DeepSeek |
| Rank | #20 | #17Higher rank |
| Tier | A | SHigher tier |
| Score | 84.8 | 85.7Higher score |
| Price | API $2 input / $10 output per 1M tokens (legacy model) | 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 June 2026 Sonnet model for large-scale coding and agentic work, now a legacy model succeeded by Sonnet 5.5 (September 2026) at the same price. | DeepSeek's September 2026 Flash model on a new architecture, adding native image understanding and a 1M-token context at lower API prices. |