Staxly

Anthropic API vs Clerk

API for Claude — frontier models for chat, tool use, agents, and long-context reasoning
vs. User management and authentication as a service

Anthropic website ↗Clerk website ↗

Pricing tiers

Anthropic API

Opus 4.7 — usage
Input $5 / output $25 / cache-write $6.25 / cache-read $0.50 per 1M tokens. Batch = 50% off.
Custom
Sonnet 4.6 — usage
Input $3 / output $15 / cache-write $3.75 / cache-read $0.30 per 1M tokens. Batch = 50% off.
Custom
Haiku 4.5 — usage
Input $1 / output $5 / cache-write $1.25 / cache-read $0.10 per 1M tokens. Batch = 50% off.
Custom
Anthropic website ↗

Clerk

Free
50k MAU included. No SSO/SAML. Perfect for side projects and early prototypes.
Free
Pro
$25/mo (or $20/mo annual). 50k MAU, $0.02 each after. 1 enterprise SSO connection per app. Webhooks, JWT templates, custom session duration.
$25/mo
Business
$300/mo (or $250/mo annual). Advanced organizations, enhanced support, additional enterprise features.
$300/mo
Enterprise
Custom. Volume MAU discounts, SLA, workspace-wide SAML SSO, dedicated support.
Custom
Clerk website ↗

Free-tier quotas head-to-head

Comparing opus-4-7 on Anthropic API vs hobby on Clerk.

MetricAnthropic APIClerk
discount batch50 % off—
mao—100 orgs/month
mau—50000 users/month
sso connections—0 connections

Features

Anthropic API · 0 features

    Clerk · 15 features

    • Account Portal — Hosted sign-in/user profile pages at accounts.yourapp.com — zero UI code, fully …
    • Bot Protection — Cloudflare Turnstile CAPTCHA integrated into sign-up.
    • Clerk Billing — Built-in Stripe-powered billing: subscriptions, plans, proration — ties directly…
    • Enterprise SSO (SAML/OIDC) — SAML and OIDC for enterprise customers. Per-domain connection. Pro+ (1 included)…
    • Impersonation — Act as a user from dashboard to debug. Logged.
    • JWT Templates — Custom JWT issuance for third-party backends (Supabase, Hasura, Firebase, Convex…
    • Machine Tokens (M2M) — API keys and machine tokens for service-to-service auth in addition to user sess…
    • Multi-Factor Auth — TOTP (authenticator apps), SMS OTP, backup codes. Forced or optional per user.
    • Organizations (B2B) — Multi-tenant orgs with roles, permissions, invitations, domain allowlist, and pe…
    • Passkeys (WebAuthn) — Passwordless passkey sign-in with per-device biometrics.
    • Prebuilt Components — Drop-in React components: <SignIn/>, <SignUp/>, <UserButton/>, <OrganizationSwit…
    • Sessions — Server-side session tokens. Sliding expiration by default; configurable absolute…
    • User Management — Full user CRUD, metadata (public/private/unsafe), email/phone verification, ban/…
    • Waitlist Mode — Collect sign-ups before opening the app. Approve waitlist entries to activate ac…
    • Webhooks — Events: user.created/updated/deleted, session.created, organization.* — delivere…

    Developer interfaces

    KindAnthropic APIClerk
    CLIClaude Code CLI—
    SDKGo SDK, Java SDK, Python SDK, Ruby SDK, TypeScript SDK (@anthropic-ai/sdk)@clerk/astro, @clerk/backend / @clerk/clerk-sdk-node, @clerk/chrome-extension, @clerk/clerk-expo, @clerk/clerk-js (vanilla), @clerk/clerk-react, @clerk/clerk-react-native, @clerk/nextjs, @clerk/nuxt, @clerk/remix, clerk-sdk-go, clerk-sdk-python, clerk-sdk-ruby, @clerk/tanstack-start, @clerk/vue
    RESTAWS Bedrock, Google Vertex AI, Microsoft Azure AI, REST API (Messages + Agents)Backend REST API, Frontend API
    MCP—Clerk MCP
    OTHER—Webhooks (Svix)
    Staxly is an independent catalog of developer platforms. Outbound links to Anthropic API and Clerk are plain references to their official websites. Pricing is verified against vendor pages at publication time — reconfirm before buying.

    Want this comparison in your AI agent's context? Install the free Staxly MCP server.