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	Claude 4.7 Opus Anthropic	Qwen3.7-Max Alibaba	GPT-5.5 OpenAI	Grok 4 xAI
Vendor	Anthropic	Alibaba	OpenAI	xAI
Family	Claude	Qwen	GPT	Grok
Release date	2026-04-16	2026-05-20	2026-04-23	2025-07-09
Context window	1,000,000 tokens	1,000,000 tokens	400,000 tokens	256,000 tokens
Parameters	—	—	—	—
Modality	text, vision	text	text, vision, audio	text
License	proprietary	proprietary	proprietary	proprietary
Source	proprietary	proprietary	proprietary	proprietary
Description	Anthropic's previous Opus flagship — superseded by Opus 4.8 on May 28, 2026 (42-day cycle). Optimized for complex reasoning and coding. Improved software engineering, long-running coding tasks, and higher-resolution vision over Claude 4.6.	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 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.	—
Links	vendor →	vendor →	vendor →	vendor →
Benchmarks
MMLU-Pro	88.2%	83.7%	87.6%	82.8%
GPQA-D	90.1%	83.0%	89.4%	87.5%
HumanEval	97.4%	93.9%	96.8%	—
Aider	91.2%	78.4%	89.7%	72.5%
AIME-25	93.5%	90.4%	94.2%	86.1%
LiveCB	80.2%	71.0%	78.9%	65.3%
MMMU	79.0%	—	78.4%	—