Claude Opus 5.5
Anthropic's Claude Opus 5.5 — the successor to Claude Opus 5 for long-running agentic coding and knowledge work — joins the catalog. It delivers Fable 5.1-level performance at 40% lower cost ($4 / $20 per million input / output tokens), with adaptive thinking always on, 1M-token context, vision input, and tool use.
anthropic/claude-opus-5-5 is Anthropic's latest flagship model, succeeding Claude Opus 5 for long-running agentic coding and knowledge work. It delivers Claude Fable 5.1-level performance at 40% lower cost ($4 / $20 per million input / output tokens), with a 1M-token context window, vision input, and adaptive thinking always on. Bring your own Anthropic key, or route through OpenRouter, OpenCode Zen, or Cline BYOK — your key, your quota.
- App code — Vercel AI SDK or OpenAI SDK.
- Coding agent —
anyr claude/anyr opencode/anyr codex(playbook). - No code — playground.
Try it in the Vercel AI SDK. createAnyRouter() reads ANYROUTER_API_KEY:
import { createAnyRouter } from "@anyr/ai-sdk-provider"
import { generateText } from "ai"
const anyrouter = createAnyRouter()
const { text } = await generateText({
model: anyrouter("anthropic/claude-opus-5-5"),
prompt: "Summarize this diff in three bullets.",
})
console.log(text)Or launch a coding agent through the anyr CLI:
curl -fsSL https://anyrouter.dev/setup.sh | bash
anyr login
anyr claude --model "anthropic/claude-opus-5-5"More: AI SDK · OpenAI SDK · coding agents.