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Claude Sonnet 5 5 API

Anthropic·1M contextChatVisionReasoningTool calling

Efficient Balanced Flagship

Overview

About this model

Anthropic Fifth-generation semi-efficient flagship, faster for daily tasks and programming scenarios with lower cost per task, supports adaptive thinking and 1M context.

Capabilities

Capability matrix

TextSupported
VisionSupported
Audio—
ToolsSupported
JSONSupported
ReasoningSupported

Pricing and groups

Routes and pricing

Claude-MAX (dedicated to cc, only connects to cli)29% of baseCollecting data

Claude Official Max full-power version, for use only with Claude Code (CLI); if you need to use Claude Desktop, you must switch to another group. Supports Fable 5.

Input

$0.58 / 1M

Output

$2.9 / 1M

Cache read

$0.058 / 1M

Cache write

$0.725 / 1M

Recent availabilityPast 24 hours · Active probes—
24h ago16h ago8h agoNow
Claude Official Max Line31% of baseOperational

Official full-power line, supports all scenarios, prioritizing stability and performance.

Input

$0.62 / 1M

Output

$3.1 / 1M

Cache read

$0.062 / 1M

Cache write

$0.775 / 1M

Recent availabilityPast 24 hours · Active probes100%
24h ago16h ago8h agoNow

Prices in USD per 1M tokens. Rates follow provider adjustments; live prices in Model Explorer as the reference.

Snapshot: 2026-10-07 23:09. Availability reflects active probes over the past 24 hours; performance reflects actual calls.

Compare

Group comparison

GroupInput/output priceSpeedStability
Claude-MAX (dedicated to cc, only connects to cli)$0.58 / $2.9——
Claude Official Max Line$0.62 / $3.1151.4 t/s100%

API

Integration example

All models share one OpenAI-compatible endpoint. To switch models, change the model field. One key accesses every model.

Python · OpenAI SDK
# pip install openai
from openai import OpenAI

client = OpenAI(
    base_url="https://api.yomiapi.com/v1",
    api_key="sk-your-yomi-key",
)

resp = client.chat.completions.create(
    model="claude-sonnet-5-5",
    messages=[{"role": "user", "content": "Hello"}],
)
print(resp.choices[0].message.content)
curl · OpenAI compatible
curl https://api.yomiapi.com/v1/chat/completions \
  -H "Authorization: Bearer sk-your-yomi-key" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "claude-sonnet-5-5",
    "messages": [{"role": "user", "content": "Hello"}]
  }'
curl · Native Anthropic protocol
curl https://api.yomiapi.com/v1/messages \
  -H "x-api-key: sk-your-yomi-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"}]
  }'

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