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 Grok 4xAI |  Claude 4.6 SonnetAnthropic | Claude 4.8 Opus Anthropic | |
|---|---|---|---|
| Vendor | xAI | Anthropic | Anthropic |
| Family | Grok | Claude | Claude |
| Release date | 2025-07-09 | 2026-02-17 | 2026-05-28 |
| Context window | 256,000 tokens | 1,000,000 tokens | 1,000,000 tokens |
| Parameters | — | — | — |
| Modality | text | text, vision | text, vision |
| License | proprietary | proprietary | proprietary |
| Source | proprietary | proprietary | proprietary |
| Description | — | 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. | 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% | 85.4% | — |
| GPQA-D | 87.5% | 85.8% | — |
| HumanEval | — | 95.9% | — |
| Aider | 72.5% | 83.6% | — |
| AIME-25 | 86.1% | 87.4% | — |
| LiveCB | 65.3% | 73.8% | — |
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Claude 4.8 Opus✓
Qwen3.7-Max+
Gemini 3.5+Gemini Omni+
GPT-5.5+Qwen3.6-27B+
DeepSeek-V4-Flash+DeepSeek-V4-Pro+Gemini 3 Pro+Claude 4.7 Opus+Claude 4.6 Sonnet✓Claude 4.5 Haiku+DeepSeek-V3.1+GPT-5+Grok 4✓Gemini 2.5 Flash+Qwen3 235B+o3+GPT-4.1+
Llama 4 Scout+Llama 4 Maverick+Gemini 2.5 Pro+DeepSeek-R1+
Mistral Large 2+