Models · Anthropic

Claude Sonnet 5.5 API, 4x less than the official price

Claude Sonnet 5.5 costs $0.50 per million input tokens and $2.50 per million output tokens on Kontinent AI. Anthropic's official price is $2.00 and $10.00, so you pay 4x less (75% less).

4x less chat messages claude-sonnet-5-5
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Price per million tokens

Tokens Official price Kontinent AI
Input Official price $2.00 $0.50
Output Official price $10.00 $2.50
Cached input Official price $0.20 $0.05
Cache write Official price $2.50 $0.625

USD per million tokens. The official price is Anthropic's, on its price page. Ours is that price times 0.25, for every kind of token.

What jobs cost with Claude Sonnet 5.5

Job Official price, then ours
1,000 support-bot replies 1,500 tokens in and 500 out, each Official price $8.00 , Kontinent AI $2.00
One coding-agent session 200,000 tokens in and 20,000 out, uncached Official price $0.60 , Kontinent AI $0.15
1,000 document summaries 4,000 tokens in and 300 out, each Official price $11.00 , Kontinent AI $2.75

Each job is priced the way the API bills it. Work out your monthly bill.

Run Claude Sonnet 5.5 for $0.15 a session, not $0.60

The same Claude Sonnet 5.5, through one API key. Change the base URL and the key, and keep your code. You see what every request cost and what you saved.

Get an API key Try Claude Haiku 4.5 first No top-up needed
  • No subscription
  • Pay only for requests that get an answer
  • Your balance does not expire
  • Sign in with Google or email

Your monthly bill

Enter what you spend at the official price and see it on Kontinent AI, in your currency.

4x less than the official price

At the official price
$100.00
With Kontinent AI
$25.00
You keep
$75.00

The model

Maker
Anthropic
Model id
claude-sonnet-5-5
Context window
200,000 tokens
Weights
Closed
Beyond plain chat
Tool calling, Image input
Speed, measured by us
not measured yet

Use Claude Sonnet 5.5

  • POST /v1/chat/completions: the OpenAI SDKs, OpenCode, most OpenAI-compatible tools.
  • POST /v1/messages: Claude Code, the Anthropic SDKs.
terminal 
curl https://api.kontinentai.com/v1/chat/completions \
  -H "Authorization: Bearer $KONTINENT_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"model": "claude-sonnet-5-5", "messages": [{"role": "user", "content": "Hello"}]}'
Claude Code 
export ANTHROPIC_BASE_URL=https://api.kontinentai.com
export ANTHROPIC_AUTH_TOKEN=$KONTINENT_API_KEY
claude --model claude-sonnet-5-5

Setup for each tool: Claude Code, Codex, OpenCode, OpenAI SDK, Anthropic SDK.

Questions

How much does the Claude Sonnet 5.5 API cost?

Claude Sonnet 5.5 costs $0.50 per million input tokens and $2.50 per million output tokens on Kontinent AI. Anthropic's official price is $2.00 and $10.00, so you pay 4x less (75% less). Cached input is $0.05 per million tokens, against $0.20 official.

Is it the same Claude Sonnet 5.5?

Yes. We send your request to the model you name, and nothing else. We check the name of the model that answered on each response.

What does a coding-agent session cost with Claude Sonnet 5.5?

A session of 200,000 input tokens and 20,000 output tokens, uncached, costs $0.15 on Kontinent AI and $0.60 at Anthropic's official price.

Can I use Claude Sonnet 5.5 with OpenCode or Claude Code?

Yes. Point OpenCode, Claude Code at Kontinent AI by changing the base URL and the key. The setup pages in the docs show each one.

What is the context window of Claude Sonnet 5.5?

200k tokens (200,000), as Anthropic publishes it.

Compare Claude Sonnet 5.5

Other models

Start with Claude Sonnet 5.5 today

Claude Sonnet 5.5 is 75% less than Anthropic's official price on every token. Top up a prepaid balance and call it from the tools you already use.

Get an API key Try Claude Haiku 4.5 first No top-up needed
  • No subscription
  • Pay only for requests that get an answer
  • Your balance does not expire
  • Sign in with Google or email