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	GPT-5.5 OpenAI	DeepSeek-V4-Flash DeepSeek	Qwen3.7-Max Alibaba	GPT-5 OpenAI
Vendor	OpenAI	DeepSeek	Alibaba	OpenAI
Family	GPT	DeepSeek	Qwen	GPT
Release date	2026-04-23	2026-04-22	2026-05-20	2025-08-07
Context window	400,000 tokens	1,000,000 tokens	1,000,000 tokens	400,000 tokens
Parameters	—	284B (13B active)	—	—
Modality	text, vision, audio	text	text	text, vision, audio
License	proprietary	MIT	proprietary	proprietary
Source	proprietary	open weights	proprietary	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.	Smaller, faster sibling to DeepSeek-V4-Pro. Same 1M context window with a much lighter 284B / 13B-active MoE.	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.	OpenAI's flagship general-purpose model. Superseded by GPT-5.5 in April 2026.
Links	vendor →	weights →	vendor →	vendor →
Benchmarks
MMLU-Pro	87.6%	—	83.7%	85.1%
GPQA-D	89.4%	—	83.0%	87.3%
HumanEval	96.8%	—	93.9%	95.2%
Aider	89.7%	—	78.4%	85.4%
AIME-25	94.2%	—	90.4%	91.0%
LiveCB	78.9%	—	71.0%	74.5%
MMMU	78.4%	—	—	74.1%