Staxly

Anthropic API vs Aider

API for Claude — frontier models for chat, tool use, agents, and long-context reasoning
vs. AI pair programmer in your terminal — works with any LLM provider

Anthropic website ↗Aider (OSS) ↗

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 ↗

Aider

OSS (Apache-2.0)
$0 forever. Apache-2.0 licensed. Install via pip. Bring your own LLM API key.
$0 base (usage-based)
LLM token cost (passthrough)
Only cost is your LLM provider bill — Claude Sonnet ~$3/M in, $15/M out; Groq + DeepSeek near-free.
$0 base (usage-based)
Aider (OSS) ↗

Free-tier quotas head-to-head

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

MetricAnthropic APIAider
discount batch50 % off—

Features

Anthropic API · 0 features

    Aider · 15 features

    • Architect Mode — Large reasoning model plans → small editor model applies.
    • Browser UI — Optional Streamlit-based GUI on localhost.
    • Conventions File — .aider.conf.yml defines project rules.
    • Copy-Paste Mode — Paste web-chat output → aider parses + applies.
    • Git-Native Workflow — Each edit = git commit with descriptive message.
    • Multi-File Editing — Handles refactors across dozens of files.
    • Multi-LLM Support — Claude, GPT, Gemini, DeepSeek, Groq, local.
    • Public LLM Benchmarks — Maintains polyglot coding benchmark leaderboard.
    • Read-Only Mode — View changes without committing.
    • Repo-Map — Automatic project context summarization.
    • Terminal-Native UI — Runs in bash/zsh, no IDE required.
    • Test-Driven Mode — Runs tests after each edit, auto-fixes failures.
    • Vim / Neovim Plugin — Launch aider from editor.
    • Voice Coding — Transcribe voice → code.
    • VS Code Extension — Launch aider from VS Code.

    Developer interfaces

    KindAnthropic APIAider
    CLIClaude Code CLIaider CLI
    SDKGo SDK, Java SDK, Python SDK, Ruby SDK, TypeScript SDK (@anthropic-ai/sdk)—
    RESTAWS Bedrock, Google Vertex AI, Microsoft Azure AI, REST API (Messages + Agents)—
    OTHER—Aider Browser UI, .aider.conf.yml, aider.vim / neovim, Aider VS Code Extension
    Staxly is an independent catalog of developer platforms. Some links to Anthropic API and Aider may be affiliate links — Staxly may earn a commission if you sign up through them, at no extra cost to you. Pricing is verified against vendor pages at publication time — reconfirm before buying.

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