Staxly

Anthropic API vs GrowthBook

API for Claude — frontier models for chat, tool use, agents, and long-context reasoning
vs. Open-source feature flags + experimentation — Warehouse Native

Anthropic website ↗GrowthBook 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 ↗

GrowthBook

Open Source (Self-Host)
MIT-licensed. Unlimited everything. Community support.
$0 base (usage-based)
Cloud — Starter (Free)
Up to 3 users. Unlimited flags + experiments. Warehouse Native included.
Free
Cloud — Pro
$40/user/month. Up to 50 users. Advanced stats, visual A/B editor, CUPED, sequential testing, bandits.
$40/mo
Cloud — Enterprise
Custom. Unlimited users, SSO/SAML, approval flows, data pipelines, exportable audit logs.
Custom
Self-Host Enterprise
Open Source + Enterprise license. Visual A/B editor, advanced metrics, SSO/SAML, approvals, training.
Custom
GrowthBook website ↗

Free-tier quotas head-to-head

Comparing opus-4-7 on Anthropic API vs oss on GrowthBook.

MetricAnthropic APIGrowthBook
discount batch50 % off—

Features

Anthropic API · 0 features

    GrowthBook · 15 features

    • Approval Flows — Require reviewer approval on flag changes. Enterprise.
    • Audit Logs — Full change history. Exportable on Enterprise.
    • Dimensions & Slicing — Break down experiment results by user dimensions.
    • Edge SDK Support — Cloudflare Workers, Lambda@Edge, Fastly, Akamai EdgeWorkers, Netlify Edge.
    • Experiments — A/B/n with CUPED variance reduction + sequential testing.
    • Feature Flags — Boolean + string + number + JSON flags with targeting.
    • Feature Reviews (PR-style) — Draft → review → approve flag changes.
    • Guardrail Metrics — Auto-monitor key metrics during experiments.
    • Metric Catalog — Define + reuse metrics across experiments.
    • Multi-Armed Bandits — Adaptive traffic allocation. Pro+.
    • Safe Rollouts — Guarded gradual rollouts with automatic rollback.
    • SSO / SAML — Enterprise SSO for cloud + self-host EE.
    • Sticky Bucketing — User stays in variant even after eligibility changes.
    • Visual A/B Test Editor — No-code DOM editor for web experiments. Pro+.
    • Warehouse Native — Connect your warehouse + run experiments against your events data.

    Developer interfaces

    KindAnthropic APIGrowthBook
    CLIClaude Code CLI—
    SDKGo SDK, Java SDK, Python SDK, Ruby SDK, TypeScript SDK (@anthropic-ai/sdk)Edge SDKs (CF Workers / Lambda@Edge / Fastly / Akamai), growthbook-android, growthbook-flutter, growthbook-go, growthbook-java, growthbook-node, growthbook-php, growthbook-python, growthbook-ruby, growthbook-swift, sdk-javascript, sdk-react
    RESTAWS Bedrock, Google Vertex AI, Microsoft Azure AI, REST API (Messages + Agents)GrowthBook REST API
    OTHER—Webhooks
    Staxly is an independent catalog of developer platforms. Outbound links to Anthropic API and GrowthBook are plain references to their official websites. Pricing is verified against vendor pages at publication time — reconfirm before buying.

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