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Grok 4×

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	Grok 4 xAI	Qwen3 235B Alibaba	Claude 4.8 Opus Anthropic	GPT-5.5 OpenAI
Vendor	xAI	Alibaba	Anthropic	OpenAI
Family	Grok	Qwen	Claude	GPT
Release date	2025-07-09	2025-04-29	2026-05-28	2026-04-23
Context window	256,000 tokens	128,000 tokens	1,000,000 tokens	400,000 tokens
Parameters	—	235B	—	—
Modality	text	text	text, vision	text, vision, audio
License	proprietary	Apache-2.0	proprietary	proprietary
Source	proprietary	open weights	proprietary	proprietary
Description	—	Predecessor to the Qwen3.6 family.	Anthropic's flagship hybrid-reasoning model — Opus 4.8 pushes coding and AI-agent workflows further (agentic coding 69.2% vs 64.3% on 4.7; multidisciplinary reasoning 57.9% vs 54.7%). 1M-token context, $5/$25 per MTok pricing held flat from Opus 4.7. Introduces Dynamic Workflows for Claude Code (research preview). GA on Anthropic API (`claude-opus-4-8`), AWS Bedrock, Google Vertex, Microsoft Foundry, and GitHub Copilot.	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 →	weights →	vendor →	vendor →
Benchmarks
MMLU-Pro	82.8%	—	—	87.6%
GPQA-D	87.5%	—	—	89.4%
HumanEval	—	—	—	96.8%
Aider	72.5%	—	—	89.7%
AIME-25	86.1%	—	—	94.2%
LiveCB	65.3%	—	—	78.9%
MMMU	—	—	—	78.4%