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 GPT-5.5OpenAI |  Qwen3 235BAlibaba |  DeepSeek-V4-FlashDeepSeek | o3 OpenAI | |
|---|---|---|---|---|
| Vendor | OpenAI | Alibaba | DeepSeek | OpenAI |
| Family | GPT | Qwen | DeepSeek | o-series |
| Release date | 2026-04-23 | 2025-04-29 | 2026-04-22 | 2025-04-16 |
| Context window | 400,000 tokens | 128,000 tokens | 1,000,000 tokens | 200,000 tokens |
| Parameters | — | 235B | 284B (13B active) | — |
| Modality | text, vision, audio | text | text | text, vision |
| License | proprietary | Apache-2.0 | MIT | proprietary |
| Source | proprietary | open weights | open weights | proprietary |
| Description | 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. | Predecessor to the Qwen3.6 family. | Smaller, faster sibling to DeepSeek-V4-Pro. Same 1M context window with a much lighter 284B / 13B-active MoE. | Reasoning-focused model in the o-series. |
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Mistral Large 2maxMax 4 models. Remove one to add another.