Compare DeepSeek-V4-Pro (DeepSeek) and GPT-5.5 (OpenAI) by price, context, capabilities, and latency.
Side by side
Compare price, provider, context, capabilities, latency, and source basis.
| Model | Provider | Input | Output | Context | Capabilities | Best for | Latency | Status | Source |
|---|---|---|---|---|---|---|---|---|---|
| DeepSeek-V4-Prodeepseek/deepseek-v4-pro | DeepSeek | $1.65 / 1M tokens | $3.31 / 1M tokens | 1M | StreamingTool callingJSON modeLong context | Chinese Q&A, general chat | 2503-4012ms | Catalog | Platform curated |
| GPT-5.5openai/gpt-5.5 | OpenAI | Starting at $5 / 1M tokens | $30 / 1M tokens | 1M | StreamingTool callingJSON modeVision | image understanding, multimodal chat | 1501-3028ms | Catalog | Platform curated |
FAQ
DeepSeek-V4-Pro is cheaper ($1.65 / 1M tokens input / $3.31 / 1M tokens output) vs GPT-5.5 ($5 / 1M tokens input / $30 / 1M tokens output). Actual cost depends on your input/output token mix — estimate it with the pricing calculator.
Both offer the same context window: 1M tokens.
Both target Long context. Pick DeepSeek-V4-Pro to optimize cost, or DeepSeek-V4-Pro for the longer context window. Test both on real prompts before committing production traffic.
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