How do I call claude-opus-5.5 from my code?
Use the OpenAI or Anthropic SDK and point baseURL at https://synapse.garden/api/v1. Set model: ‘anthropic/claude-opus-5.5’ and supply your Synapse Garden API key. No code changes beyond the base URL.
Anthropic · MultimodalReleased 2026-09-22
claude-opus-5.5
anthropic/claude-opus-5.5 idClaude Opus 5.5 is a step-change improvement over Opus 5 for agentic coding, long-running agentic tasks, knowledge work, communication, and vision. It is more token-efficient per completed task and reports progress, findings, and next steps in clear language.
Tool useReasoningChatWeb search
Type
Use claude-opus-5.5
# Drop-in OpenAI-compatible client$ import { generateText } from 'ai'$$ const { text } = await generateText({$ model: 'anthropic/claude-opus-5.5',$ baseURL: 'https://synapse.garden/api/v1',$ apiKey: process.env.MG_KEY,$ prompt: 'Why is the sky blue?',$ })
1M
CONTEXT WINDOW128K
MAX OUTPUT$4.40/M
INPUT · PER M$22.00/M
OUTPUT · PER MPRICING
List prices, every modality.
| Rate | Per million tokens · USD |
|---|---|
| Input | $4.40/M |
| Output | $22.00/M |
| Cache read | $0.220/M |
| Cache write | $5.50/M |
Honest list pricesHow we calculate prices
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- Input$8.80/MOutput$44.00/MContext1M
- Input$11.00/MOutput$55.00/MContext1M
- Input$5.50/MOutput$27.50/MContext1M
- Input$11.00/MOutput$55.00/MContext1M
- Input$11.00/MOutput$55.00/MContext1M
- Input$2.20/MOutput$11.00/MContext1M
- Input$5.50/MOutput$27.50/MContext1M
- Input$11.00/MOutput$55.00/MContext1M
- Input$5.50/MOutput$27.50/MContext1M
- Input$3.30/MOutput$16.50/MContext1M
- Input$5.50/MOutput$27.50/MContext1M
- Input$5.50/MOutput$27.50/MContext200K
FAQ · CLAUDE-OPUS-5.5
Frequently asked
How much does claude-opus-5.5 cost?
Input: $4.40/M per million tokens. Output: $22.00/M per million tokens. The free tier includes a million tokens every month at no cost.
What's the context window for claude-opus-5.5?
claude-opus-5.5 supports a context window of 1M tokens, with a maximum output of 128K tokens.
Do I need a separate Anthropic or OpenAI account?
No. Synapse Garden is the single API surface — one key gives you OpenAI, Anthropic, Google, Meta, Mistral, DeepSeek, xAI, Cohere, and more. Billing, rate limits, and audit logs are unified.
READY
Try claude-opus-5.5 in three minutes.
Sign up, create a key, drop our base URL into your existing client. The free tier includes a million tokens every month — no credit card.