---
title: "Claude Fable 5 — API access"
description: "Claude Fable 5 API pricing: official $10/$50 per 1M tokens, $5/$25 with the flat 50% apiToken.sale discount. Mythos-class — the strongest Claude tier."
url: "https://apitoken.sale/models/claude-fable-5"
language: "en"
---
# Claude Fable 5

Claude Fable 5 is Anthropic's Mythos-class model — a tier above Opus for the longest-horizon agentic work, at double the Opus token price.

- **Model ID:** `claude-fable-5`
- **Tier:** Mythos
- **Context window:** 1M tokens
- **Max output:** 128K tokens
- **Official price (per 1M):** $10 input / $50 output
- **Your price (per 1M):** input $5, output $25 (flat 50% off)
- **Base URL:** `https://api.apitoken.sale` · **Endpoint:** `POST /v1/messages`

## Best for

- The longest-horizon autonomous runs where failure costs more than tokens.
- The hardest software tasks — it leads SWE-bench Pro.
- An orchestrator or advisor role reviewing and steering cheaper models.

## Notes

- Mythos class sits above Opus: $10/$50 vs the Opus $5/$25 tariff.
- Safety classifiers may reroute sensitive requests to Opus.
- Adaptive thinking is the recommended mode; thinking tokens bill as output.

## Call it

```bash
curl https://api.apitoken.sale/v1/messages \
  -H "x-api-key: $APITOKEN_API_KEY" \
  -H "anthropic-version: 2023-06-01" \
  -H "content-type: application/json" \
  -d '{"model": "claude-fable-5", "max_tokens": 1024, "messages": [{"role": "user", "content": "Hello"}]}'
```

## FAQ

**How much does the Claude Fable 5 API cost?**

Officially $10 per 1M input tokens and $50 per 1M output tokens — double the Opus tariff. On apiToken.sale the flat 50% discount applies to every call: $5/$25.

**What is the model ID for Claude Fable 5?**

claude-fable-5. Use it unchanged with the Anthropic SDK, Claude Code, Cursor or any compatible tool pointed at https://api.apitoken.sale.

**Fable 5 or Mythos 5?**

They share weights and price; Mythos 5 stays restricted to Project Glasswing partners. Fable 5 is the publicly available model, and the one served here.

---
API reference: https://apitoken.sale/md/docs · All models: https://apitoken.sale/md/models