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 o3OpenAI |  Gemini 2.5 Pro | Gemini 3.5 |  Claude 4.8 OpusAnthropic | |
|---|---|---|---|---|
| Vendor | OpenAI | Anthropic | ||
| Family | o-series | Gemini | Gemini | Claude |
| Release date | 2025-04-16 | 2025-03-25 | 2026-05-20 | 2026-05-28 |
| Context window | 200,000 tokens | 2,000,000 tokens | 2,000,000 tokens | 1,000,000 tokens |
| Parameters | — | — | — | — |
| Modality | text, vision | text, vision, audio, video | text, vision, audio, video | text, vision |
| License | proprietary | proprietary | proprietary | proprietary |
| Source | proprietary | proprietary | proprietary | proprietary |
| Description | Reasoning-focused model in the o-series. | Predecessor to Gemini 3 Pro. | Google DeepMind's next-gen Gemini — positioned as "frontier intelligence with action". Built for complex agentic workflows. Announced at Google I/O 2026. | 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. |
| Links | ||||
| Benchmarks | ||||
| MMLU-Pro | — | 84.1% | 88.9% | — |
| GPQA-D | 87.7% | 84.0% | 91.2% | — |
| AIME-25 | 88.9% | — | 96.1% | — |
| MMMU | — | 72.4% | 86.0% | — |
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Claude 4.8 Opus✓
Qwen3.7-MaxmaxGemini 3.5✓Gemini OmnimaxGPT-5.5maxQwen3.6-27Bmax
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