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	Grok 4 xAI	GPT-4.1 OpenAI	Claude 4.8 Opus Anthropic	Gemini 3 Pro Google
Vendor	xAI	OpenAI	Anthropic	Google
Family	Grok	GPT	Claude	Gemini
Release date	2025-07-09	2025-04-14	2026-05-28	2026-04-22
Context window	256,000 tokens	1,000,000 tokens	1,000,000 tokens	2,000,000 tokens
Parameters	—	—	—	—
Modality	text	text, vision	text, vision	text, vision, audio, video
License	proprietary	proprietary	proprietary	proprietary
Source	proprietary	proprietary	proprietary	proprietary
Description	—	—	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.	Google DeepMind's flagship multimodal model. Best-in-class for multimodal understanding and agentic / vibe coding workflows. A "Deep Think" reasoning mode is available to AI Ultra subscribers.
Links	vendor →		vendor →	vendor →
Benchmarks
MMLU-Pro	82.8%	—	—	87.1%
GPQA-D	87.5%	—	—	88.6%
HumanEval	—	—	—	96.5%
Aider	72.5%	—	—	84.8%
AIME-25	86.1%	—	—	92.8%
LiveCB	65.3%	—	—	76.1%
MMMU	—	—	—	84.3%