Claude Haiku 5.5 completes the Claude 5.5 family

anthropic/claude-haiku-5-5 is live, and with it the Claude 5.5 family is complete on AnyRouter: Opus 5.5, Sonnet 5.5 and now Haiku 5.5.

Haiku 5.5 is the fastest and most cost-efficient model in the Claude 5.x lineup. It has a 1M-token context window with up to 128k output tokens, takes text and images, supports tool use and function calling, and runs with adaptive thinking always on. Use it for rapid ideation, summarization and classification. The published list price is $0.10 per million input tokens and $0.50 per million output tokens.

• App code — Vercel AI SDK or OpenAI SDK.
• Coding agent — anyr claude / anyr opencode / anyr codex (playbook).
• No code — playground.

Haiku 5.5 is **BYOK-only**: add an Anthropic, OpenRouter or AIHubMix key. Add the key under Dashboard → BYOK; the request goes out with your key and the provider bills you at its own rates. AnyRouter charges nothing for a BYOK route.

Try it in the Vercel AI SDK (guide). 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-haiku-5-5"),
  prompt: "Classify these support tickets by urgency.",
})
console.log(text)

Already on the OpenAI SDK? OpenAI SDK playbook:

import OpenAI from "openai"

const client = new OpenAI({
  baseURL: "https://anyrouter.dev/api/v1",
  apiKey: process.env.ANYROUTER_API_KEY,
})

const res = await client.chat.completions.create({
  model: "anthropic/claude-haiku-5-5",
  messages: [{ role: "user", content: "Hello" }],
})
console.log(res.choices[0]?.message.content)

curl https://anyrouter.dev/api/v1/chat/completions \
  -H "Authorization: Bearer $ANYROUTER_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"model":"anthropic/claude-haiku-5-5","messages":[{"role":"user","content":"Hello"}]}'

Or launch a coding agent through the anyr CLI (Claude Code · OpenCode):

curl -fsSL https://anyrouter.dev/setup.sh | bash
anyr login
anyr claude --model "anthropic/claude-haiku-5-5"

curl -fsSL https://anyrouter.dev/setup.sh | bash
anyr login
anyr opencode --model "anthropic/claude-haiku-5-5"

curl -fsSL https://anyrouter.dev/setup.sh | bash
anyr login
anyr codex --model "anthropic/claude-haiku-5-5"

More: AI SDK · OpenAI SDK · coding agents · BYOK setup.