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	DeepSeek-V3.1 DeepSeek	Claude 4.8 Opus Anthropic	Qwen3.6-27B Alibaba	Grok 4 xAI
Vendor	DeepSeek	Anthropic	Alibaba	xAI
Family	DeepSeek	Claude	Qwen	Grok
Release date	2025-08-21	2026-05-28	2026-04-22	2025-07-09
Context window	128,000 tokens	1,000,000 tokens	262,144 tokens	256,000 tokens
Parameters	671B	—	27B (dense)	—
Modality	text	text, vision	text, vision, video	text
License	MIT	proprietary	Apache-2.0	proprietary
Source	open weights	proprietary	open weights	proprietary
Description	Large MoE open-weight model. Predecessor to DeepSeek-V4.	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.	Alibaba's first dense open-weight in the 3.6 family. Strong agentic-coding scores (77.2 SWE-bench Verified, matching Claude 4.5 Opus on Terminal-Bench 2.0). Supports 201 languages and multimodal text/image/video input.	—
Links	weights →	vendor →	weights →	vendor →
Benchmarks
MMLU-Pro	—	—	78.9%	82.8%
GPQA-D	—	—	—	87.5%
HumanEval	—	—	91.5%	—
Aider	—	—	70.2%	72.5%
AIME-25	—	—	—	86.1%
LiveCB	—	—	—	65.3%
MMMU	—	—	70.3%	—