| 2 models | Op OpenAI GPT-5.5 View → | Gr xAI Grok 4.3 View → |
|---|---|---|
| Maker | OpenAI | xAI |
| Tier | Flagship | Flagship |
| Status | Default | Default |
| Context window | 1M ctx | 1M ctx |
| Knowledge cutoff | Jan 1, 2026 | — |
| Released | Apr 23, 2026 | Apr 30, 2026 |
| API string | gpt-5.5 | grok-4.3 |
| Note | Current flagship general-purpose model; strong coding, reasoning, writing, and agentic tasks. Tiered pricing above a context threshold. | Current flagship; cost-efficient ($1.25/$2.50 per 1M), 1M context, strong agentic tool-calling and native real-time X/web access. |
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