Claude Opus 4.1 API Pricing & Quick Start

Name: Claude Opus 4.1 API
Brand: Anthropic

Claude Opus 4.1 is an updated version of Anthropic’s flagship model, offering improved performance in coding, reasoning, and agentic tasks. It achieves 74.5% on SWE-bench Verified and shows notable gains...

Intelligence#157 / 573

Artificial Analysis Intelligence Index

Speed#166 / 586

0.0

Output tokens per second (median)

Input Price#576 / 586

$15.00NT$ 486

USD / 1M tokens

Output Price#579 / 586

$75.00NT$ 2429

USD / 1M tokens

First-token latency#1 / 586

0.00s

Time to first token (AA median)

Provider	Anthropic
Released	August 2025
Model ID	`anthropic/claude-opus-4.1`

Technical specifications

Context window

200K tokens

Reasoning

Yes

Input

ImageTextFile

Output

Text

Pricing comparison

BazaarLink retail price alongside AA's observed market standard.

BazaarLink price our site

Input$15.00NT$ 486

Output$75.00NT$ 2429

Cache read$1.50NT$ 49

Cache write$18.75NT$ 607

3:1 blended (est.)$30.00NT$ 972

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

Market reference Artificial Analysis

Input$15.00

Output$75.00

Cache readAA not tracked

Cache writeAA not tracked

3:1 blended$30.00

✓ 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 28

Coding

Math

MMLU

GPQA

This modelCategory leader

Overall intelligence

#157out of 573 models

Aggregated across academic benchmarks

Time to first token

🥇

#1out of 586 models

AA 全球 p50：0.00 秒

Intelligence

Top 27%

This model

Category leader

Median

Top 5 — CodingCoding Index leaderboard

1GPT-5.6 Sol (xhigh)openai/gpt-5-6-sol-xhigh78$5 / $30

2Claude Opus 5 (Adaptive Reasoning, Max Effort)anthropic/claude-opus-578$5 / $25

3GPT-5.6 Sol (max)openai/gpt-5-6-sol77$5 / $30

4GPT-5.6 Sol (high)openai/gpt-5-6-sol-high77$5 / $30

5Claude Opus 5 (Adaptive Reasoning, Xhigh Effort)anthropic/claude-opus-5-xhigh77$5 / $25

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

Quick Start

Use Claude Opus 4.1 via BazaarLink API — just change the base_url:

Python

from openai import OpenAI

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

response = client.chat.completions.create(
    model="anthropic/claude-opus-4.1",
    messages=[{"role": "user", "content": "Hello!"}],
)
print(response.choices[0].message.content)

TypeScript

import OpenAI from "openai";

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

const response = await client.chat.completions.create({
  model: "anthropic/claude-opus-4.1",
  messages: [{ role: "user", content: "Hello!" }],
});
console.log(response.choices[0].message.content);

Why use Claude Opus 4.1 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 4.1?

How much does the Claude Opus 4.1 API cost?

Claude Opus 4.1 costs $15.0000 per 1M input tokens and $75.0000 per 1M output tokens when accessed through BazaarLink.

How do I use Claude Opus 4.1 with the OpenAI SDK?

Set base_url to "https://bazaarlink.ai/api/v1" and use model ID "anthropic/claude-opus-4.1". All OpenAI SDK methods (chat.completions, embeddings, streaming) work without code changes.

What is the context window for Claude Opus 4.1?

Claude Opus 4.1 supports a context window of 200,000 tokens.

Is Claude Opus 4.1 available for free?

Claude Opus 4.1 is a paid model. BazaarLink offers free trial credits on registration so you can test it without a credit card.

Relay integrity checks

Tested endpoints: 2 runs
Independent hosts: 1
Model-family fingerprint match: 100%
Anomalies detected: 2 runs
Data range: past 90 days

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

View the full integrity report →