Claude Sonnet 5.5
Sep 28, 2026
- Context
- 1M tokens
- Max output
- 128K tokens
- Input / 1M
- 2 / MTok
- Output / 1M
- 10 / MTok
1 mapped API
Model Family
Claude 5.5
Claude 5.5 is an Anthropic model family represented in iilib by Claude Sonnet 5.5 and Claude Opus 5.5.
Official documentationVerified Oct 3, 2026
Models
2
Provider
Anthropic
API access
Claude API
Context range
1M tokens
Input price range
2–4 / MTok
Output price range
10–20 / MTok
Overview
The recorded Sonnet and Opus variants both support one-million-token context windows, text and image input, tool use, and Claude API access.
Models in this family
Current indexed models and their documented specifications.
Claude Opus 5.5
Sep 22, 2026
- Context
- 1M tokens
- Max output
- 128K tokens
- Input / 1M
- 4 / MTok
- Output / 1M
- 20 / MTok
1 mapped API
| Model | Released | Context | Max output | Input | Output | API |
|---|---|---|---|---|---|---|
| Claude Sonnet 5.5 | Sep 28, 2026 | 1M tokens | 128K tokens | 2 / MTok | 10 / MTok | Claude API |
| Claude Opus 5.5 | Sep 22, 2026 | 1M tokens | 128K tokens | 4 / MTok | 20 / MTok | Claude API |