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	o3 OpenAI	Claude 4.7 Opus Anthropic	Gemini 3.5 Google	Gemini 2.5 Flash Google
Vendor	OpenAI	Anthropic	Google	Google
Family	o-series	Claude	Gemini	Gemini
Release date	2025-04-16	2026-04-16	2026-05-20	2025-06-17
Context window	200,000 tokens	1,000,000 tokens	2,000,000 tokens	1,000,000 tokens
Parameters	—	—	—	—
Modality	text, vision	text, vision	text, vision, audio, video	text, vision, audio
License	proprietary	proprietary	proprietary	proprietary
Source	proprietary	proprietary	proprietary	proprietary
Description	Reasoning-focused model in the o-series.	Anthropic's previous Opus flagship — superseded by Opus 4.8 on May 28, 2026 (42-day cycle).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.	Google DeepMind's next-gen Gemini — positioned as "frontier intelligence with action". Built for complex agentic workflows. Announced at Google I/O 2026.	Google's cost-and-latency-optimized Gemini 2.5 variant. Generally available June 2025 — designed for high-throughput agentic workflows with sub-second first-token latency.
Links		vendor →	vendor →
Benchmarks
MMLU-Pro	—	88.2%	88.9%	—
GPQA-D	87.7%	90.1%	91.2%	—
HumanEval	—	97.4%	—	—
Aider	—	91.2%	—	—
AIME-25	88.9%	93.5%	96.1%	—
LiveCB	—	80.2%	—	—
MMMU	—	79.0%	86.0%	—