Claude Opus 5.5 API Pricing & Quick Start

Intelligence	Input Price	Output Price
#1 / 664 58 Artificial Analysis Intelligence Index	#401 / 456 $4.00NT$ 127 USD / 1M tokens	#403 / 456 $20.00NT$ 635 USD / 1M tokens

Claude Opus 5.5 is Anthropic's flagship model for demanding reasoning, coding, and long-horizon agentic work, succeeding Claude Opus 5. It is particularly strong at multi-step changes in large codebases, code...

Provider	Anthropic
Released	September 2026
Model ID	`anthropic/claude-opus-5.5`

Technical specifications

Context window

1M tokens

Reasoning

Yes

Input → Output

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Pricing comparison

BazaarLink retail price alongside AA's observed market standard.

BazaarLink price our site

Input$4.00NT$ 127

Output$20.00NT$ 635

Cache read$0.20NT$ 6

Cache write$5.00NT$ 159

3:1 blended (est.)$8.00NT$ 254

All prices per 1M tokens. Supports TWD credit card / official invoice.

Market reference Artificial Analysis

Input$4.00

Output$20.00

Cache readAA not tracked

Cache writeAA not tracked

3:1 blended—

✓ Matches market reference — BazaarLink does not mark up.
Source: artificialanalysis.ai

Independent benchmarks

Scores below come from Artificial Analysis, an independent third party. BazaarLink does not participate in the testing.

Intelligence 58

Coding

Math

MMLU

GPQA

This modelCategory leader

Overall intelligence

🥇

#1out of 664 models

Aggregated across academic benchmarks

Intelligence

Top 1%

This model

Category leader

Median

Top 5 — CodingCoding Index leaderboard

1Claude Fable 5.1 (Adaptive Reasoning, Max Effort, Default Fallback)?/claude-fable-5-182$10 / $50

2Claude Fable 5.1 (Adaptive Reasoning, Xhigh Effort, Default Fallback)?/claude-fable-5-1-xhigh81$10 / $50

3Claude Fable 5.1 (Adaptive Reasoning, High Effort, Default Fallback)?/claude-fable-5-1-high79$10 / $50

4GPT-5.6 Sol (xhigh)openai/gpt-5-6-sol-xhigh78$4 / $20

5Claude Opus 5 (Adaptive Reasoning, Max Effort)anthropic/claude-opus-578$5 / $25

AASource: Artificial Analysis · Independent third-party evaluation; not influenced by BazaarLinkView full evaluation on AA →

Quick Start

Use Claude Opus 5.5 via BazaarLink API — just change the base_url:

Python

from openai import OpenAI

client = OpenAI(
    base_url="https://api.bazaarlink.ai/v1",
    api_key="sk-bl-YOUR_API_KEY",
)

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

TypeScript

import OpenAI from "openai";

const client = new OpenAI({
  baseURL: "https://api.bazaarlink.ai/v1",
  apiKey: "sk-bl-YOUR_API_KEY",
});

const response = await client.chat.completions.create({
  model: "anthropic/claude-opus-5.5",
  messages: [{ role: "user", content: "Hello!" }],
});
console.log(response.choices[0].message.content);

Why use Claude Opus 5.5 via BazaarLink?

✓USD billing (TWD-quoted) + unified invoices — no foreign credit card needed for Taiwan teams
✓OpenAI-compatible API — zero code changes required
✓Automatic failover — multi-provider redundancy for the same model
✓Chinese-language support — local team, instant help

Try Now ← All Models

Frequently Asked Questions

What is Claude Opus 5.5?

How much does the Claude Opus 5.5 API cost?

Claude Opus 5.5 costs $4.00 per 1M input tokens and $20.00 per 1M output tokens when accessed through BazaarLink.

How do I use Claude Opus 5.5 with the OpenAI SDK?

Set base_url to "https://api.bazaarlink.ai/v1" and use model ID "anthropic/claude-opus-5.5". All OpenAI SDK methods (chat.completions, embeddings, streaming) work without code changes.

What is the context window for Claude Opus 5.5?

Claude Opus 5.5 supports a context window of 1,000,000 tokens.

Is Claude Opus 5.5 available for free?

Claude Opus 5.5 is a paid model. BazaarLink offers free trial credits on registration so you can test it without a credit card.

Relay integrity checks

No integrity-check data is available for this model yet.

BazaarLink Probe verifies endpoints that claim to serve this model and flags behavior that differs from the reference baseline.

View the full integrity report →