Claude Sonnet 5.5

Overview

Anthropic’s best combination of speed and intelligence, a direct upgrade on Claude Sonnet 5. 1M context, 128K output, vision, file input, prompt caching, adaptive thinking.

Specs

Field	Value
Model ID	`claude-sonnet-5.5`
Best for	Everyday agentic coding: building features, fixing bugs, tool use
Context window	1M
Max output tokens	128K
Input modalities	Text, Image, File
Output modalities	Text
Tool calling	Yes
Structured outputs	Yes
Prompt caching	Yes
Vision	Yes
Reasoning	Yes
Speed	Medium
Cost band	Premium
Release stage	Stable

Pricing

	Per 1M tokens
Input	$2.70
Output	$13.50

Example

from openai import OpenAI

client = OpenAI(base_url="https://kymaapi.com/v1", api_key="kyma-...")

response = client.chat.completions.create(
    model="claude-sonnet-5.5",
    messages=[{"role": "user", "content": "..."}],
    tools=[...],  # function calling supported
)

Agent query example

Ask the API which models fit, instead of hardcoding an id:

curl "https://kymaapi.com/v1/models?recommended_for=chat&tools=true&quality_tier=frontier-open"

​Overview

​Specs

​Pricing

​Example

​Agent query example

Overview

Specs

Pricing

Example

Agent query example