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	o3 OpenAI	DeepSeek-V3.1 DeepSeek	Claude 4.8 Opus Anthropic	Claude 4.6 Sonnet Anthropic
Vendor	OpenAI	DeepSeek	Anthropic	Anthropic
Family	o-series	DeepSeek	Claude	Claude
Release date	2025-04-16	2025-08-21	2026-05-28	2026-02-17
Context window	200,000 tokens	128,000 tokens	1,000,000 tokens	1,000,000 tokens
Parameters	—	671B	—	—
Modality	text, vision	text	text, vision	text, vision
License	proprietary	MIT	proprietary	proprietary
Source	proprietary	open weights	proprietary	proprietary
Description	Reasoning-focused model in the o-series.	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.	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.
Links		weights →	vendor →
Benchmarks
MMLU-Pro	—	—	—	85.4%
GPQA-D	87.7%	—	—	85.8%
HumanEval	—	—	—	95.9%
Aider	—	—	—	83.6%
AIME-25	88.9%	—	—	87.4%
LiveCB	—	—	—	73.8%