---
title: "Claude API — All variants, pricing, code samples | RunAPI"
url: "https://runapi.ai/models/claude.md"
canonical: "https://runapi.ai/models/claude.md"
locale: "en"
model: "Claude"
provider: "Anthropic"
modality: "text"
variant_count: 7
price_from_cents: 5
---

# Claude

Anthropic's LLM for complex reasoning, code, analysis, and extended-context tasks.

**Provider:** Anthropic
**Modality:** Text
**Catalog:** 7 variants

Claude is Anthropic's large language model family available in Opus, Sonnet, and Haiku tiers, designed for nuanced reasoning, long-context analysis, and code generation. It emphasizes accuracy, instruction following, and predictable outputs.

## Variants

| Version | Variant | Pricing | Billing | URL |
|---|---|---|---|---|
| claude-haiku-4-5-20251001 | `haiku-4-5-20251001` | $0.050 | 1K tokens | https://runapi.ai/models/claude/haiku-4-5-20251001.md |
| claude-opus-4-5-20251101 | `opus-4-5-20251101` | $0.250 | 1K tokens | https://runapi.ai/models/claude/opus-4-5-20251101.md |
| claude-opus-4-6 | `opus-4-6` | $0.250 | 1K tokens | https://runapi.ai/models/claude/opus-4-6.md |
| claude-opus-4-7 | `opus-4-7` | $0.250 | 1K tokens | https://runapi.ai/models/claude/opus-4-7.md |
| claude-opus-4-8 | `opus-4-8` | $0.250 | 1K tokens | https://runapi.ai/models/claude/opus-4-8.md |
| claude-sonnet-4-5-20250929 | `sonnet-4-5-20250929` | $0.130 | 1K tokens | https://runapi.ai/models/claude/sonnet-4-5-20250929.md |
| claude-sonnet-4-6 | `sonnet-4-6` | $0.130 | 1K tokens | https://runapi.ai/models/claude/sonnet-4-6.md |


## Install

```sh
npm install @runapi.ai/claude
# or
gem install runapi-claude
```

## Quickstart

```sh
curl -X POST https://runapi.ai/v1/messages \
  -H "Authorization: Bearer $RUNAPI_KEY" \
  -H "Content-Type: application/json" \
  -d '{ "model": "claude-haiku-4-5-20251001", "prompt": "..." }'
```

## Context

Claude is Anthropic's LLM family, spanning Opus (frontier), Sonnet (balanced), and Haiku (fast). Through RunAPI, all Claude variants share the same API shape and per-token billing.

## FAQ

### Which variant should I start with?

Pick the cheapest variant that meets your quality bar. Most teams start on the fast variant and graduate to pro for production.

### Is there a free tier?

New accounts get free first calls on every model. After that, pay per call.

### Do you stream results?

Where streaming is available, RunAPI streams end-to-end.

### How are failures billed?

Failed generations are not charged.

### Are outputs cached?

Generated outputs are stored and retrievable by task ID. Inputs are not cached.

### Can I use commercially?

Yes — commercial use is included for every variant unless a model license explicitly restricts it, which is called out on the variant page.

### What about rate limits?

Per-key rate limits scale with usage tier. See pricing page for current limits.

### Where can I report issues?

Open an issue on the public GitHub repo or email support.