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	Grok 4 xAI	GPT-5 OpenAI	Claude 4.8 Opus Anthropic	Mistral Large 2 Mistral
Vendor	xAI	OpenAI	Anthropic	Mistral
Family	Grok	GPT	Claude	Mistral
Release date	2025-07-09	2025-08-07	2026-05-28	2024-07-24
Context window	256,000 tokens	400,000 tokens	1,000,000 tokens	128,000 tokens
Parameters	—	—	—	123B
Modality	text	text, vision, audio	text, vision	text
License	proprietary	proprietary	proprietary	Mistral Research License
Source	proprietary	proprietary	proprietary	open weights
Description	—	OpenAI's flagship general-purpose model. Superseded by GPT-5.5 in April 2026.	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.	Large text-only Mistral model with a 128K context window and 123B parameters, tuned for strong instruction following and long-context reasoning. Mistral's flagship open-weights release in the Large 2 line.
Links	vendor →	vendor →	vendor →	vendor →weights →
Benchmarks
MMLU-Pro	82.8%	85.1%	—	—
GPQA-D	87.5%	87.3%	—	—
HumanEval	—	95.2%	—	89.0%
Aider	72.5%	85.4%	—	—
AIME-25	86.1%	91.0%	—	—
LiveCB	65.3%	74.5%	—	—
MMMU	—	74.1%	—	—