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Claude 4.8 Opus×

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Claude 4.6 Sonnet×

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	Claude 4.8 Opus Anthropic	Grok 4 xAI	Claude 4.6 Sonnet Anthropic	DeepSeek-R1 DeepSeek
Vendor	Anthropic	xAI	Anthropic	DeepSeek
Family	Claude	Grok	Claude	DeepSeek
Release date	2026-05-28	2025-07-09	2026-02-17	2025-01-20
Context window	1,000,000 tokens	256,000 tokens	1,000,000 tokens	128,000 tokens
Parameters	—	—	—	671B
Modality	text, vision	text	text, vision	text
License	proprietary	proprietary	proprietary	MIT
Source	proprietary	proprietary	proprietary	open weights
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.	—	Anthropic's mid-tier flagship — released 12 days after Opus 4.6 and matching most of its capabilities at ~40% the API cost ($3/$15 per 1M tokens). 1M-token context.	Reasoning-focused open-weight model.
Links	vendor →	vendor →		weights →
Benchmarks
MMLU-Pro	—	82.8%	85.4%	—
GPQA-D	—	87.5%	85.8%	—
HumanEval	—	—	95.9%	—
Aider	—	72.5%	83.6%	—
AIME-25	—	86.1%	87.4%	79.8%
LiveCB	—	65.3%	73.8%	—