expectedAnthropicExpected: Q3 2026

Claude Opus 5 API

Anthropic's next flagship reasoning model, expected to extend Opus 4.x on long-horizon agentic tasks and coding. Will likely debut with a larger context window and improved tool-use reliability.

What we know

Anthropic's next flagship reasoning model, expected to extend Opus 4.x on long-horizon agentic tasks and coding. Will likely debut with a larger context window and improved tool-use reliability.

Why it matters: Developers tracking Anthropic's Opus cadence expect Opus 5 as the successor to Claude 4.x Opus — the default for production coding agents.

Expected pricing: ~$15 / $75 per 1M tokens (in-line with Opus 4.x)

Current best equivalent

LIVE ON SKILLBOSS TODAY

Claude 4.5 Opus

Current Anthropic flagship — same family, same agentic strengths. We will auto-route to Opus 5 the day it ships.

Use Claude 4.5 Opus Now →Get API Key

We'll auto-switch your API calls to Claude Opus 5 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 5 — routed via SkillBoss"
    }
  }'

Alternate options

ModelSkill IDTradeoff
Claude Sonnet 4 (Nitro)anthropic/claude-sonnet-4:nitroFaster + cheaper, ~80% of Opus quality
GPT-5.4openai/gpt-5.4Alternative frontier model for benchmarking

Notify me when Claude Opus 5 launches

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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 5”, “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.