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Claude Sonnet 5.5 API

Access Claude Sonnet 5.5 through a simple, OpenAI-compatible API. Change one URL and one key — your existing code works immediately. No SDK changes needed.

49% cheaper than OpenRouter

Claude Sonnet 5.5 Pricing

Token TypeQubaxOpenRouterSave
Input (per 1M)$1.01$2.0049%
Output (per 1M)$5.07$10.0049%

At $1.01/1M input tokens, Claude Sonnet 5.5 is one of the most affordable APIs in its class.

Why use Claude Sonnet 5.5 API on Qubax?

  • ⚡Point your OpenAI SDK at https://api.qubax.ai/v1
  • ⚡Use model ID: claude-sonnet-5.5
  • ⚡Generate API keys starting with qbx_live_
  • ⚡Full streaming, function calling, and vision support

About Claude Sonnet 5.5

Claude Sonnet 5.5 is Anthropic's Sonnet-class model for well-scoped everyday work, succeeding Claude Sonnet 5 as a direct upgrade. It is especially strong at building features, fixing bugs, and producing... It supports a 1M-token context window and up to 128K output tokens per request. Native capabilities include reasoning, vision, tool calling, structured output, streaming, context caching. On Qubax it is served by 18 independent sellers, so pricing stays competitive and uptime stays high.

1M context window128K max output tokensReasoning with selectable effort levels (default)Vision / image inputFunction & tool callingJSON schema responsesPDF inputWeb search

Claude Sonnet 5.5 API Access — code example

Python — OpenAI SDK, one-line switchpython
from openai import OpenAI

# Only two lines change vs the official API:
client = OpenAI(
    base_url="https://api.qubax.ai/v1",
    api_key="qbx_live_YOUR_KEY",
)

response = client.chat.completions.create(
    model="claude-sonnet-5.5",
    messages=[{"role": "user", "content": "Hello, Claude Sonnet 5.5!"}],
)
print(response.choices[0].message.content)

More Anthropic models on Qubax

Claude Opus 5Claude Opus 4.8 FastClaude Opus 4.6Claude Haiku 4.5Claude Sonnet 5Claude Sonnet 4.5

Get started in 60 seconds

  1. 1Create a free account at qubax.ai/register
  2. 2Add crypto credits (200+ coins, $3 minimum, credits never expire)
  3. 3Generate an API key and set your base URL to https://api.qubax.ai/v1
  4. 4Use model ID claude-sonnet-5.5 — done!

Claude Sonnet 5.5 API Access FAQ

How much does Claude Sonnet 5.5 cost API?

On Qubax, Claude Sonnet 5.5 costs $1.01 per 1M input tokens and $5.07 per 1M output tokens. 49% cheaper than OpenRouter. Pay with 200+ cryptocurrencies.

Can I use Claude Sonnet 5.5 with my existing tools?

Yes. Qubax is fully OpenAI-compatible. Change your base URL to api.qubax.ai/v1 and use your Qubax key. Works with Cline, Cursor, OpenCode, LangChain, and any OpenAI SDK.

Do I need a credit card?

No. Qubax accepts 200+ cryptocurrencies. No credit card, no KYC.

Start using Claude Sonnet 5.5 API

No credit card. Crypto accepted. Credits never expire.

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Also available for:💻 Coding💬 Chatbots🤖 AI Agent🪙 Crypto Payments
Claude Sonnet 5.5 API — 49% off · Qubax AI