Tag: Claude

The Claude API gives you programmatic access to Claude in your own applications and scripts. This guide gets you from zero to a working integration in Python or JavaScript.

Prerequisites

• Anthropic account at console.anthropic.com
• API key from Console → API Keys
• Python 3.7+ or Node.js 18+

Installation

# Python
pip install anthropic

# JavaScript
npm install @anthropic-ai/sdk

Your First API Call (Python)

import anthropic

client = anthropic.Anthropic(api_key="your-api-key-here")

message = client.messages.create(
    model="claude-sonnet-4-6",
    max_tokens=1024,
    messages=[{"role": "user", "content": "Explain APIs in plain English."}]
)
print(message.content[0].text)

Adding a System Prompt

message = client.messages.create(
    model="claude-sonnet-4-6",
    max_tokens=1024,
    system="You are a helpful customer support agent for Acme Corp.",
    messages=[{"role": "user", "content": "How do I reset my password?"}]
)

Streaming Responses

with client.messages.stream(
    model="claude-sonnet-4-6",
    max_tokens=1024,
    messages=[{"role": "user", "content": "Write a 500-word blog post about AI."}]
) as stream:
    for text in stream.text_stream:
        print(text, end="", flush=True)

Model Selection

Model	String	Best For
Claude Opus 4.6	claude-opus-4-6	Complex reasoning, coding
Claude Sonnet 4.6	claude-sonnet-4-6	Balanced everyday tasks
Claude Haiku 4.5	claude-haiku-4-5-20251001	Fast lightweight tasks

Frequently Asked Questions

How much does the Claude API cost?

Pricing is per token (input and output separately). Check anthropic.com/pricing. Haiku is cheapest, Sonnet offers the best cost/quality balance for most applications.

Do I need a Claude subscription to use the API?

No. API access is separate. Create an Anthropic Console account and pay per token used.

Claude Code and Windsurf represent two different visions of AI-assisted development — one terminal-native and model-focused, the other IDE-native and workflow-focused. Both are serious tools for professional developers in 2026. This comparison covers what actually matters: coding quality, context management, workflow fit, and cost.

What They Are

Claude Code is Anthropic’s terminal-native AI coding tool. You install it as an npm package, authenticate with your Claude account, and work directly in your shell. It uses Claude models exclusively and has a 1-million-token context window for large codebases. It’s designed for developers who think in the command line.

Windsurf (formerly Codeium) is an AI-native IDE — a full development environment built around AI assistance. It includes a traditional code editor with AI deeply embedded throughout: autocomplete, multi-file editing, natural language commands, and a chat interface. It supports multiple models including Claude, GPT-4o, and its own models.

Feature Comparison

Feature	Claude Code	Windsurf
Interface	Terminal	Full IDE (VS Code-based)
Model	Claude only	Multi-model (Claude, GPT-4o, own models)
Context window	1M tokens	Varies by model
Autocomplete	No	Yes (supercomplete)
Multi-file editing	Yes	Yes (Cascade)
Git integration	Yes	Yes
Codebase indexing	Yes (via context)	Yes (semantic search)
Natural language commands	Yes	Yes (Cascade)
Price	Max sub ($100+/mo) or API	Free tier + $15/mo Pro

Model Performance

Claude Code’s underlying model — Opus 4.6 — scores 80.8% on SWE-bench Verified, one of the highest published scores for any model on real-world engineering tasks. Windsurf can access Claude models via its multi-model architecture, but its proprietary models score lower on the same benchmark.

If raw model performance on complex tasks is the priority, Claude Code’s direct access to Claude Opus gives it an edge.

Developer Experience

Claude Code has a steeper initial learning curve — there’s no GUI, and effective use requires understanding how to structure prompts for agentic coding sessions. Once mastered, many developers find the terminal interface faster and less distracting than a full IDE.

Windsurf has a gentler onboarding curve. Developers already comfortable in VS Code will feel at home immediately. The autocomplete, Cascade multi-file editing, and inline AI chat create a lower-friction introduction to AI-assisted coding.

Pricing Reality

This is where Windsurf has a clear advantage for cost-conscious developers. Windsurf’s Pro plan runs $15/month with a generous free tier. Claude Code requires Claude Max at $100/month minimum, or API usage (which can be cheaper for low-volume use but expensive at scale).

For developers just starting with AI coding tools, Windsurf’s entry point is meaningfully more accessible.

Choose Claude Code If You…

• Prefer terminal-native workflows and spend most of your time in the shell
• Work with very large codebases that benefit from the 1M token context window
• Need the highest possible model performance on complex engineering tasks
• Are already on a Claude Max subscription

Choose Windsurf If You…

• Want an IDE experience with AI deeply integrated throughout
• Are new to AI coding tools and want a gentle learning curve
• Need persistent autocomplete alongside agentic coding capabilities
• Want model flexibility or lower entry cost

Frequently Asked Questions

Is Claude Code better than Windsurf?

For terminal-native developers prioritizing model performance: Claude Code has the edge. For IDE-native developers wanting lower cost and full-featured editor integration: Windsurf is the better fit.

Can Windsurf use Claude models?

Yes. Windsurf supports multiple models including Claude. You can access Claude’s capabilities within the Windsurf environment, though Claude Code provides more direct and optimized access to Claude’s full context window.

How much does Claude Code cost?

Claude Code requires Claude Max ($100/month) or API billing. Windsurf starts at $15/month Pro with a free tier.

Claude and Gemini are the two most capable non-OpenAI AI assistants in 2026, and they’ve converged on similar pricing while diverging significantly in strengths. This comparison is based on real task testing across ten categories — not marketing copy or benchmark cherry-picking.

Quick Verdict by Task

Task Category	Winner	Why
Long document analysis	Claude	200K context, better synthesis quality
Coding and software dev	Claude	80.8% SWE-bench vs Gemini’s lower scores
Research and summarization	Gemini	Real-time web access by default
Image generation	Gemini	Native Imagen integration
Image understanding	Tie	Both excellent
Long-form writing quality	Claude	Less generic, better argumentation
Google Workspace integration	Gemini	Native Docs, Gmail, Sheets integration
Multimodal (video, audio)	Gemini	Gemini 2.0 handles video natively
Safety and reliability	Claude	Constitutional AI, fewer hallucinations
Free tier value	Gemini	More generous free access to capable models

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The Core Architectural Difference

Claude was built by an AI safety company as its primary product. Every design decision — training methodology, Constitutional AI, refusal behavior — reflects that mission. The result is an assistant that reasons carefully, acknowledges uncertainty, and produces high-quality text and code.

Gemini was built by Google as part of its search and productivity ecosystem. It’s deeply integrated with Google services, has native real-time web access, handles video and audio inputs, and generates images natively. It reflects Google’s multimodal ambitions.

Writing Quality Comparison

We gave both models identical prompts across five writing types: blog post intro, executive email, technical explanation, creative story opening, and marketing headline variations.

Claude consistently produced cleaner, more specific prose with fewer generic constructions. Gemini was competent but occasionally defaulted to more templated structures. For long-form professional writing, Claude has the edge. For short-form or format-constrained writing, the gap narrows significantly.

Coding Comparison

Claude Opus 4.6 scores 80.8% on SWE-bench Verified — the leading benchmark for real-world software engineering tasks. Gemini’s published scores on the same benchmark are lower. In practice: Claude produces fewer hallucinated APIs, better handles complex multi-file refactoring, and provides more accurate debugging analysis.

For developers choosing a primary AI coding assistant, Claude is the stronger choice. Gemini is more than adequate for routine coding tasks.

Pricing Comparison

Plan	Claude	Gemini
Free	Limited Sonnet	Gemini 1.5 Flash (more generous)
Standard paid	$20/mo (Pro)	$20/mo (Advanced)
Power tier	$100-200/mo (Max)	$20/mo (Google One AI Premium includes Workspace)

Gemini’s free tier is more generous. At the $20/month level, they’re similarly priced — but Gemini Advanced includes Google One storage and Workspace AI features, which Claude doesn’t. For pure AI assistant use, the value comparison is roughly equal.

Choose Claude If You…

• Do serious coding or software development
• Work with long documents, legal files, or research papers regularly
• Need the highest quality long-form writing output
• Value careful reasoning and epistemic honesty over speed
• Don’t need image generation or deep Google Workspace integration

Choose Gemini If You…

• Live in Google Workspace (Gmail, Docs, Sheets, Drive)
• Need real-time web access as a default capability
• Work with video, audio, or multimodal content
• Need image generation built in
• Want more generous free tier access

The Both Approach

Many professionals run both: Claude for deep work (long documents, complex writing, coding), Gemini for Google Workspace integration and quick research. At $20/month each, running both costs $40/month total — reasonable for knowledge workers who use AI daily.

Frequently Asked Questions

Is Claude better than Gemini for coding?

Yes. Claude Opus 4.6 leads Gemini on SWE-bench coding benchmarks and produces fewer hallucinated APIs and better multi-file reasoning in real-world use.

Is Gemini better than Claude for Google Workspace?

Yes. Gemini has native integration with Gmail, Google Docs, Sheets, and Drive. Claude requires copy-pasting content or MCP integrations to access Google Workspace data.

Which is cheaper, Claude or Gemini?

Both cost $20/month at the standard tier. Gemini’s free tier is more generous. Claude’s power tiers ($100-200/month) have no direct Gemini equivalent.