Claude Sonnet 5.5
The newest Sonnet: quality and speed together, the everyday model for writing and code.
Model IDclaude-sonnet-5-5
Good for
- Emails, copy, translation and summaries
- Everyday development in Claude Code
- Fast, high-quality back-and-forth chat
Context window1,000,000 tokens
CategoryText
Credit rates
| Type | Credits | About |
|---|---|---|
| Inputper 1M tokens | 126,434 | HK$12.64 |
| Outputper 1M tokens | 632,170 | HK$63.22 |
10,000 credits = HK$1. Credits come with your monthly plan and each request is charged by what it uses. Every request is itemised under Usage in the console.
Which plans include it
| Plan | Included | Per month, roughly (messages) |
|---|---|---|
| Taster HK$28 | ✓ | ≈ 282 |
| Everyday HK$128 | ✓ | ≈ 1,128 |
| Advanced HK$288 | ✓ | ≈ 2,934 |
| Professional HK$588 | ✓ | ≈ 6,320 |
Monthly counts assume the whole month goes to this one use; chat, images and video share one credit pool. Compare plans →
How to use it
Through the API
Create an API key in the console, then call it by its model ID:
curl https://api.essevin.com/v1/messages \
-H "x-api-key: $ESSEVIN_API_KEY" \
-H "anthropic-version: 2023-06-01" \
-H "content-type: application/json" \
-d '{
"model": "claude-sonnet-5-5",
"max_tokens": 1024,
"messages": [{"role": "user", "content": "Hello"}]
}'More in this family
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