AnthropicPremium+ plan
Claude Sonnet 5.5
Anthropic's newest Sonnet: stronger reasoning, coding, and agent planning than Sonnet 4.6 at a lower price, with a 1M-token context window. Anthropic's recommended replacement for Sonnet 4.5, which retires November 30, 2026.
You always get the exact model you pick — we never silently route you to another.
Specifications
| Provider | Anthropic |
|---|---|
| Released | 2026-09-28 |
| Intelligence | High |
| Speed | Medium |
| Context window | 1,000,000 tokens |
| Max output | 128,000 tokens |
| Knowledge cutoff | June 2026 |
| Input price | $2.00 / 1M tokens |
| Output price | $10.00 / 1M tokens |
| Request cost | 5 premium requests |
| Plan tier | Premium+ |
| Input | Text, Image |
| Output | Text |
| Features | Cached input: $0.10 / 1M tokens, Web search and function calling supported |
| Model ID | claude-sonnet-5-5 |