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 DeepSeek-R1DeepSeek | DeepSeek-V4-Pro DeepSeek |  GPT-5.5OpenAI |  Qwen3.6-27BAlibaba | |
|---|---|---|---|---|
| Vendor | DeepSeek | DeepSeek | OpenAI | Alibaba |
| Family | DeepSeek | DeepSeek | GPT | Qwen |
| Release date | 2025-01-20 | 2026-04-22 | 2026-04-23 | 2026-04-22 |
| Context window | 128,000 tokens | 1,000,000 tokens | 400,000 tokens | 262,144 tokens |
| Parameters | 671B | 1.6T (49B active) | — | 27B (dense) |
| Modality | text | text | text, vision, audio | text, vision, video |
| License | MIT | MIT | proprietary | Apache-2.0 |
| Source | open weights | open weights | proprietary | open weights |
| Description | Reasoning-focused open-weight model. | DeepSeek's flagship open-weight MoE. 1.6T parameters with 49B activated, 1M-token context, and a hybrid attention scheme (CSA + HCA) that delivers long-context inference at ~27% of V3.2's FLOPs. | OpenAI's smartest and most intuitive model — successor to GPT-5, with major coding, research, and document workflow gains. GPT-5.5 Pro variant also available for heavier reasoning. | Alibaba's first dense open-weight in the 3.6 family. Strong agentic-coding scores (77.2 SWE-bench Verified, matching Claude 4.5 Opus on Terminal-Bench 2.0). Supports 201 languages and multimodal text/image/video input. |
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