rumoredAnthropicExpected: Unknown

Claude Opus Mythos API

Rumored codename for an Anthropic creative-writing-tuned variant of Opus. Unconfirmed — tracked here so the page is live if/when it ships.

What we know

Rumored codename for an Anthropic creative-writing-tuned variant of Opus. Unconfirmed — tracked here so the page is live if/when it ships.

Why it matters: Leaks and changelog scrapers have surfaced the "Mythos" codename in internal preview channels.

Expected pricing: Unknown

Current best equivalent

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Claude 4.5 Opus

Current best Claude for long-form creative writing — Mythos is expected to be a fine-tune of this base.

Use Claude 4.5 Opus Now →Get API Key

We'll auto-switch your API calls to Claude Opus Mythos the moment it launches — no code changes required.

Call it with curl

curl -X POST https://api.skillboss.co/v1/run \
  -H "Authorization: Bearer $SKILLBOSS_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "skill_id": "anthropic/claude-4-5-opus",
    "input": {
      "prompt": "Say hello from Claude Opus Mythos — routed via SkillBoss"
    }
  }'

Alternate options

ModelSkill IDTradeoff
Claude Sonnet 4anthropic/claude-sonnet-4:nitroCheaper for high-volume creative tasks

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Disclaimer: SkillBoss is an independent multi-provider gateway and is not affiliated with, endorsed by, or sponsored by Anthropic. “Claude Opus Mythos”, “Anthropic”, and all related product names, logos, and trademarks are the property of their respective owners and are referenced here solely for factual comparison purposes. Information on this page is based on public roadmaps, leaks, and industry signals — not an official commitment from Anthropic. Actual release dates, names, features, and pricing may differ. See our full IP / trademark policy.