Claude Fable 5 API
Anthropic’s most capable model, on metered token billing.
Call Claude Fable 5 — the most capable model for long-horizon agentic work and the hardest reasoning — through a drop-in OpenAI-compatible REST endpoint at $20.00 input / $100.00 output per million tokens. 1M context window, no subscription, pay only for tokens you use.
Drop into Claude Code or Codex in 60 seconds
Keep the CLI you already use. Swap one env var. Spend 50% less per token.
Sign up · 1 free credit
Email + password. 1 free coding credit lands in your account — enough to test from Claude Code or Codex right away. No card.
Create accountCopy your ck_ key
Dashboard → API Keys → New key. Drop it into Claude Code, Codex CLI, Cursor, Aider — anywhere that speaks OpenAI or Anthropic.
Open dashboardPlug into your CLI
Export ANTHROPIC_BASE_URL / OPENAI_BASE_URL and you keep your existing tooling. Snippet below pastes verbatim.
See all integrations# Use Claude Fable 5 inside Claude Code CLI
# 1. Grab your key at https://hypereal.cloud/manage-api-keys
# 2. Point Claude Code at Hypereal (Anthropic-compatible endpoint):
# NOTE: no /v1 — the Anthropic SDK appends /v1/messages itself.
export ANTHROPIC_BASE_URL="https://api.hypereal.cloud"
export ANTHROPIC_API_KEY="ck_..."
export ANTHROPIC_MODEL="claude-fable-5"
claude # run as usual — same Claude Code experience, current metered.
# Prefer raw curl? Same key works:
# curl https://api.hypereal.cloud/v1/messages \
# -H "Authorization: Bearer ck_..." -H "Content-Type: application/json" \
# -d '{"model":"claude-fable-5","max_tokens":128,"messages":[{"role":"user","content":"hi"}]}'New accounts get 1 free coding credit · enough to send a real Claude Code / Codex prompt before you spend a cent.
Claude Fable 5 public token pricing
Hypereal Credits rates per million tokens
Buy once. Pay by token.
Prepaid coding credits for Opus / Sonnet / GPT-5.5. No subscription, no monthly reset, no vague usage bucket.
Questions, answered
Is this the real Claude Fable 5 from Anthropic?
Yes — requests are routed to Claude Fable 5. We do not fine-tune, distill, or substitute the model.
How is Hypereal pricing set?
Hypereal aggregates capacity across regions and bills in USD on a credit basis. Current pricing comes from reseller economics and bulk capacity, not from a different model or quality tier.
Can I keep using the Anthropic SDK or do I have to switch?
Both work. Use the Anthropic SDK with base_url=https://api.hypereal.cloud/v1 for native compatibility, or use the OpenAI SDK with the same base URL for drop-in chat-completions usage.
What is the context window and max output?
Claude Fable 5 has a 1,000,000-token context window with up to 128,000 tokens of output. Thinking is always on and adaptive — control depth with the effort setting. Tool use and high-resolution vision are supported.
How does billing work?
Pay per token using credits. 100 credits = $1. Buy from $10, no subscription, no monthly reset. Card and crypto accepted.
Run Claude Fable 5 with current metered pricing
Switch your base_url, keep your code, and pay $20.00 / $100.00 per million tokens. Credits start at $10.