Does Curtly compression alter the accuracy of Claude Opus 5?

No. Curtly uses Safe Vault AST protection to lock code blocks, equations, and JSON schemas untouched. Only linguistic noise, duplicate context, and whitespace bloat are pruned.

How do I integrate Curtly with Claude Opus 5 in my existing app?

You only change the baseURL in the official Anthropic SDK to https://proxy.curtly.dev/v1 and pass your Curtly key. No codebase refactoring or prompt rewriting is necessary.

Anthropic · Claude Opus 5 · Claude BPE

Claude Opus 5 token cost optimizer and calculator

Eliminate expensive 5x generation token multipliers and compress input context without breaking AST code syntax.

Input token price

$5.00/1M

Output token price

$25.00/1M (5x)

Tokenizer family

Claude BPE

Average combined savings

Up to 65%

Why Claude Opus 5 generates high API invoices

Claude Opus 5 delivers state of the art reasoning, but its $25.00 per million output token pricing makes production agent loops and long-form code generation exceptionally expensive. Unstructured prompts, repetitive schema definitions, and conversational markdown fluff multiply costs exponentially.

Asymmetric 5x output price multiplier

Output tokens cost 500% more than input tokens ($25.00 vs $5.00/1M). Conversational preamble, unsolicited caveats, and excessive formatting directly bloat the invoice on every request.

Claude BPE whitespace and punctuation sensitivity

Anthropic Claude BPE tokenizer splits leading indentation, multi-space indents, and punctuation blocks into separate sub-tokens, adding 15-25% invisible token overhead to code and JSON payloads.

Compound agent context loops

Multi-turn autonomous agents send back previous conversation history with every new tool invocation, compounding redundant tokens across entire user sessions.

Anthropic Claude BPE encoding mechanics

Efficiency rating: 65k vocabulary with high sensitivity to code formatting

The Claude BPE vocabulary handles prose efficiently, but exhibits severe sub-token fragmentation when processing indented code blocks, trailing commas, and repeated delimiters. Curtly normalizes these structures in-memory before tokenization.

How Curtly optimizes Claude Opus 5 workflows

Safe Vault AST syntax lock

Isolates source code, JSON schemas, and templated parameters bit-for-bit so that zero syntax corruption or hallucination occurs during input compression.

Output brevity governor

Injects targeted generation constraints that strip verbose pleasantries and unsolicited filler while preserving deep technical depth, saving 35-50% on expensive output tokens.

Sub-2ms in-memory proxy execution

Processes and streams tokens in volatile RAM with zero persistent disk storage and zero cold start latency.

1-line drop-in integration (typescript)

import Anthropic from '@anthropic-ai/sdk'; // Route Claude Opus 5 through Curtly with 1-line baseURL change const client = new Anthropic({ apiKey: process.env.ANTHROPIC_API_KEY, baseURL: 'https://proxy.curtly.dev/v1', defaultHeaders: { 'X-Curtly-Key': process.env.CURTLY_API_KEY, 'X-Curtly-Mode': 'balanced', }, }); const response = await client.messages.create({ model: 'opus-5', max_tokens: 4096, messages: [{ role: 'user', content: 'Generate high-throughput pipeline' }], });

Claude Opus 5 ROI simulator

Simulate your Claude Opus 5 savings

Calculate your exact monthly financial return with Claude Opus 5.

Monthly input token volume

M tokens

Presets:

Production model

Input payload architecture

-60.5% input tokens

Output response efficiency

-35% output tokens

Sub-2ms latency

Zero schema syntax drift

1-line baseURL proxy drop-in

Estimated net savings

$6,496/mo

+$77,952 projected annual savings

Current provider bill$15,000/mo

New bill with Curtly$8,475/mo

Curtly planGrowth ($29/mo)

Input prompt savings (60.5%)-$3,025/mo

Output generation savings (35%)-$3,500/mo

Payback return22,400% ROI (pays off in < 24h)

Start optimizing free Inspect benchmark comparisons below↓

Free tier available. No credit card required.

Frequently asked questions: Claude Opus 5

Anthropic prices Claude Opus 5 output tokens at $25.00 per million (a 5x multiplier over input tokens at $5.00) to reflect the heavy compute required during autoregressive generation. Curtly targets this asymmetric pricing by pruning output filler.