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Refactor this loop to be O(n) instead of O(n²)
Claude Sonnet 4.6

Use a hash map to track seen elements in a single pass. Here’s the rewrite:

function dedupe<T>(items: T[]): T[] {
  const seen = new Set<T>();
  return items.filter((x) => !seen.has(x) && seen.add(x));
}

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Claude Sonnet 4.6
AnthropicFlagship chat
Claude Opus 4.7
AnthropicMost capable
Claude Haiku 4.5
AnthropicFast
GPT-5
OpenAIReasoning
GPT-5.4
OpenAIPremium reasoning
GPT-5.5
OpenAILatest
GPT-5 Mini
OpenAIFast
Llama 4 Maverick
MetaOpen frontier
Llama 3.3 70B
MetaCheap & capable
Qwen3 Coder
AlibabaCode-tuned

Simple pricing

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Free
$0forever
200K tokens / mo
  • Llama 3.3 70B, GPT-5 Nano, Claude Haiku 4.5
  • 30-day chat history
  • Hard cap — no surprise charges
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Pro
$20per month
5M tokens / mo
  • All Pro models incl. Sonnet 4.6, GPT-5
  • 1-year chat history
  • Custom system prompts
  • Pay-as-you-go overage
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Ultra
$99per month
20M tokens / mo
  • Every model incl. Opus 4.7, GPT-5.4 Pro, GPT-5.5
  • Forever chat history
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FAQ

Which models can I use?+

Every Anthropic Claude (Haiku/Sonnet/Opus 4.x), the OpenAI GPT-5 family, Meta Llama 4 + 3.3, plus DeepSeek, Qwen, Gemma and more — 80+ in total. Free has fast/cheap models; Pro adds frontier chat models; Ultra adds top-tier reasoning models.

How is usage measured?+

Tokens. Every message counts inputTokens (your prompt + history) + outputTokens (the reply). Quotas reset each billing cycle. Paid tiers have overage at a marked-up rate; free is a hard cap.

Do you train on my chats?+

No. Conversations are stored only so we can show them back to you, and never used to train models — ours or anyone else's. We use anonymous aggregates for service improvements.

Can I cancel anytime?+

Yes — one click in Billing opens the Stripe Customer Portal. Cancellation takes effect at the end of your current billing cycle.

Where is my data stored?+

AWS RDS Postgres (encrypted at rest) in us-east-1. Inference is processed by DigitalOcean's Gradient AI, which retains payloads only for the duration of the request.

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