| 2 models | Op OpenAI GPT-5.5 View → | Cl Anthropic Claude Opus 4.8 View → |
|---|---|---|
| Maker | OpenAI | Anthropic |
| Tier | Flagship | Flagship |
| Status | Default | Active |
| Context window | 1M ctx | 1M ctx |
| Knowledge cutoff | Jan 1, 2026 | — |
| Released | Apr 23, 2026 | May 28, 2026 |
| API string | gpt-5.5 | claude-opus-4-8 |
| Note | Current flagship general-purpose model; strong coding, reasoning, writing, and agentic tasks. Tiered pricing above a context threshold. |
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