GPT-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
GPT-5.5
B
DeepSeek V4.1 Flash
- ProviderOpenAIDeepSeek
- Rank#23#17Higher rank
- TierASHigher tier
- Score84.085.7Higher score
- PriceAPI $5 input / $30 output per 1M tokensAPI $0.30 input / $1.20 output per 1M tokens at peak ($0.15 / $0.60 off-peak); MIT open weightsLower price tier
- TaglineOpenAI's April 2026 flagship for complex professional and agentic coding work, since followed by the GPT-5.6 family (July 2026) and GPT-6 Astra (September 2026).DeepSeek's September 2026 Flash model on a new architecture, adding native image understanding and a 1M-token context at lower API prices.
| Attribute | GPT-5.5 | DeepSeek V4.1 Flash |
|---|---|---|
| Provider | OpenAI | DeepSeek |
| Rank | #23 | #17Higher rank |
| Tier | A | SHigher tier |
| Score | 84.0 | 85.7Higher score |
| Price | API $5 input / $30 output per 1M tokens | API $0.30 input / $1.20 output per 1M tokens at peak ($0.15 / $0.60 off-peak); MIT open weightsLower price tier |
| Tagline | OpenAI's April 2026 flagship for complex professional and agentic coding work, since followed by the GPT-5.6 family (July 2026) and GPT-6 Astra (September 2026). | DeepSeek's September 2026 Flash model on a new architecture, adding native image understanding and a 1M-token context at lower API prices. |