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Claude 4.8 Opus×

DeepSeek-V3.1×

DeepSeek-V4-Flash×

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	Claude 4.8 Opus Anthropic	DeepSeek-V3.1 DeepSeek	DeepSeek-V4-Flash DeepSeek	Grok 4 xAI
Vendor	Anthropic	DeepSeek	DeepSeek	xAI
Family	Claude	DeepSeek	DeepSeek	Grok
Release date	2026-05-28	2025-08-21	2026-04-22	2025-07-09
Context window	1,000,000 tokens	128,000 tokens	1,000,000 tokens	256,000 tokens
Parameters	—	671B	284B (13B active)	—
Modality	text, vision	text	text	text
License	proprietary	MIT	MIT	proprietary
Source	proprietary	open weights	open weights	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.	Large MoE open-weight model. Predecessor to DeepSeek-V4.	Smaller, faster sibling to DeepSeek-V4-Pro. Same 1M context window with a much lighter 284B / 13B-active MoE.	—
Links	vendor →	weights →	weights →	vendor →
Benchmarks
MMLU-Pro	—	—	—	82.8%
GPQA-D	—	—	—	87.5%
Aider	—	—	—	72.5%
AIME-25	—	—	—	86.1%
LiveCB	—	—	—	65.3%