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	GPT-5.5 OpenAI	Qwen3.7-Max Alibaba	DeepSeek-V4-Flash DeepSeek	DeepSeek-V4-Pro DeepSeek
Vendor	OpenAI	Alibaba	DeepSeek	DeepSeek
Family	GPT	Qwen	DeepSeek	DeepSeek
Release date	2026-04-23	2026-05-20	2026-04-22	2026-04-22
Context window	400,000 tokens	1,000,000 tokens	1,000,000 tokens	1,000,000 tokens
Parameters	—	—	284B (13B active)	1.6T (49B active)
Modality	text, vision, audio	text	text	text
License	proprietary	proprietary	MIT	MIT
Source	proprietary	proprietary	open weights	open weights
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.	Alibaba's flagship agent model — 1M-token context, extended-thinking mode, 56.6 on the Artificial Analysis Intelligence Index v4.0 (5th overall, #1 Chinese). 50.8% on Terminal-Bench Hard. Designed for long-horizon agent workloads (hundreds-to-thousands of steps). Closed-weight, $2.50/$7.50 per 1M tokens.	Smaller, faster sibling to DeepSeek-V4-Pro. Same 1M context window with a much lighter 284B / 13B-active MoE.	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.
Links	vendor →	vendor →	weights →	weights →
Benchmarks
MMLU-Pro	87.6%	83.7%	—	84.2%
GPQA-D	89.4%	83.0%	—	82.4%
HumanEval	96.8%	93.9%	—	95.1%
Aider	89.7%	78.4%	—	80.1%
AIME-25	94.2%	90.4%	—	88.6%
LiveCB	78.9%	71.0%	—	72.4%
MMMU	78.4%	—	—	—