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 o3OpenAI |  Claude 4.8 OpusAnthropic |  Grok 4xAI | GPT-4.1 OpenAI | |
|---|---|---|---|---|
| Vendor | OpenAI | Anthropic | xAI | OpenAI |
| Family | o-series | Claude | Grok | GPT |
| Release date | 2025-04-16 | 2026-05-28 | 2025-07-09 | 2025-04-14 |
| Context window | 200,000 tokens | 1,000,000 tokens | 256,000 tokens | 1,000,000 tokens |
| Parameters | — | — | — | — |
| Modality | text, vision | text, vision | text | text, vision |
| License | proprietary | proprietary | proprietary | proprietary |
| Source | proprietary | proprietary | proprietary | 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. | — | — |
| Links | ||||
| Benchmarks | ||||
| MMLU-Pro | — | — | 82.8% | — |
| GPQA-D | 87.7% | — | 87.5% | — |
| Aider | — | — | 72.5% | — |
| AIME-25 | 88.9% | — | 86.1% | — |
| LiveCB | — | — | 65.3% | — |
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Claude 4.8 Opus✓
Qwen3.7-Maxmax
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