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	o3 OpenAI	Claude 4.8 Opus Anthropic	DeepSeek-V3.1 DeepSeek	Claude 4.7 Opus Anthropic
Vendor	OpenAI	Anthropic	DeepSeek	Anthropic
Family	o-series	Claude	DeepSeek	Claude
Release date	2025-04-16	2026-05-28	2025-08-21	2026-04-16
Context window	200,000 tokens	1,000,000 tokens	128,000 tokens	1,000,000 tokens
Parameters	—	—	671B	—
Modality	text, vision	text, vision	text	text, vision
License	proprietary	proprietary	MIT	proprietary
Source	proprietary	proprietary	open weights	proprietary
Description	Reasoning-focused model in the o-series.	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.	Anthropic's previous Opus flagship — superseded by Opus 4.8 on May 28, 2026 (42-day cycle). Optimized for complex reasoning and coding. Improved software engineering, long-running coding tasks, and higher-resolution vision over Claude 4.6.
Links		vendor →	weights →	vendor →
Benchmarks
MMLU-Pro	—	—	—	88.2%
GPQA-D	87.7%	—	—	90.1%
HumanEval	—	—	—	97.4%
Aider	—	—	—	91.2%
AIME-25	88.9%	—	—	93.5%
LiveCB	—	—	—	80.2%
MMMU	—	—	—	79.0%