DeepSeek V4 Pro vs GPT-5.5
Rank, tier, score and price side by side, from our weekly rankings. Scores are editorial opinion based on public sources.
A
DeepSeek V4 Pro
B
GPT-5.5
- ProviderDeepSeekOpenAI
- Rank#30#23Higher rank
- TierAA
- Score83.084.0Higher score
- PriceAPI $1.32 input / $3.96 output per 1M tokens at peak hours ($0.66 / $1.98 off-peak); MIT open weightsLower price tierAPI $5 input / $30 output per 1M tokens
- TaglineMIT-licensed open-weight heavyweight, among the open-weight leaders on SWE-bench Verified and LiveCodeBench.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).
| Attribute | DeepSeek V4 Pro | GPT-5.5 |
|---|---|---|
| Provider | DeepSeek | OpenAI |
| Rank | #30 | #23Higher rank |
| Tier | A | A |
| Score | 83.0 | 84.0Higher score |
| Price | API $1.32 input / $3.96 output per 1M tokens at peak hours ($0.66 / $1.98 off-peak); MIT open weightsLower price tier | API $5 input / $30 output per 1M tokens |
| Tagline | MIT-licensed open-weight heavyweight, among the open-weight leaders on SWE-bench Verified and LiveCodeBench. | 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). |