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Claude models from Anthropic are renowned for their strong reasoning capabilities, nuanced understanding of code, and adherence to instructions.

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Available Models

GitWhisper supports the latest Claude models across multiple generations:

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Claude 4 Series (Latest)

The most advanced Claude models with superior capabilities:
  • claude-sonnet-4-5-20250929 ⭐ (default) - Best balance of intelligence and speed
  • claude-sonnet-4-20250514 - Stable Sonnet 4 release
  • claude-opus-4-1-20250805 - Enhanced Opus with extended context
  • claude-opus-4-20250514 - Most powerful Claude model

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Claude 3.7 Series

Recent generation with excellent performance:
  • claude-3-7-sonnet-20250219 - Latest 3.7 release
  • claude-3-7-sonnet-latest - Always uses newest 3.7 version

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Claude 3.5 Series

Previous generation, still highly capable:
  • claude-3-5-sonnet-latest - Auto-updates to latest 3.5
  • claude-3-5-sonnet-20241022 - October 2024 release
  • claude-3-5-sonnet-20240620 - June 2024 release

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Claude 3 Series

First generation Claude 3 models:
  • claude-3-opus-20240307 - Most powerful Claude 3
  • claude-3-sonnet-20240307 - Balanced Claude 3
  • claude-3-haiku-20240307 - Fast and efficient
The default model claude-sonnet-4-5-20250929 provides exceptional quality and is recommended for most use cases.

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Usage

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Basic Usage

Generate commit messages with Claude: 
# Use default Claude model (claude-sonnet-4-5-20250929)
gitwhisper commit --model claude

# Shorthand
gw commit -m claude

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Specific Variant

Choose a specific Claude model: 
# Use Claude Opus 4 for maximum quality
gitwhisper commit --model claude --model-variant claude-opus-4-20250514

# Use Claude Haiku for speed
gitwhisper commit --model claude --model-variant claude-3-haiku-20240307

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Set as Default

Make Claude your default model: 
# Set Claude as default
gitwhisper set-defaults --model claude

# Set specific variant as default
gitwhisper set-defaults --model claude --model-variant claude-opus-4-20250514

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API Key Setup

You need an Anthropic API key to use Claude models. Get one at console.anthropic.com. 
gitwhisper save-key --model claude --key "sk-ant-..."
The key is stored securely in ~/.git_whisper.yaml

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Model Comparison

ModelIntelligenceSpeedCostBest For
Opus 4⭐⭐⭐⭐⭐⭐⭐⭐💰💰💰Complex analysis
Sonnet 4.5⭐⭐⭐⭐⭐⭐⭐⭐⭐💰💰Balanced choice
Sonnet 4⭐⭐⭐⭐⭐⭐⭐⭐💰💰Everyday use

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Key Features

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Superior Code Understanding

Claude models excel at:
  • Contextual awareness - Understanding how changes fit into the broader codebase
  • Intent recognition - Identifying the purpose behind code modifications
  • Nuanced descriptions - Generating detailed yet concise commit messages
  • Following conventions - Adhering to conventional commit formats

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Large Context Window

All Claude models support 200K token context windows, allowing them to:
  • Analyze large diffs across many files
  • Understand relationships between changes
  • Maintain consistency in commit message style

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Extended Thinking

Claude 4 models can engage in extended reasoning, making them particularly good at:
  • Complex refactoring analysis
  • Identifying architectural changes
  • Understanding subtle bug fixes

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Code Analysis

Claude models provide exceptional code analysis: 
# Analyze staged changes
gitwhisper analyze --model claude

# Use Opus 4 for deep analysis
gitwhisper analyze --model claude --model-variant claude-opus-4-20250514

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Analysis Output Includes

1

Change Summary

High-level overview of what changed
2

Impact Assessment

How changes affect the codebase
3

Issue Detection

Potential bugs or problems identified
4

Recommendations

Suggestions for improvements

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Model Selection Guide

Choose claude-opus-4-20250514 when:
  • Working with complex, multi-layered changes
  • Need deep understanding of code implications
  • Dealing with subtle or nuanced modifications
  • Maximum quality is more important than speed
Choose claude-sonnet-4-5-20250929 (default) when:
  • You want the best balance of quality and speed
  • Working with typical development workflows
  • Need reliable, consistent results
  • This is the recommended choice for most users
Choose claude-3-haiku-20240307 when:
  • Speed is critical
  • Working with simple, straightforward changes
  • Need to minimize costs
  • Dealing with high-volume commits

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Multi-Language Support

Claude models work particularly well with GitWhisper’s multi-language support: 
# Change language to Spanish
gitwhisper change-language
# Select: Spanish

# Generate Spanish commit message
gitwhisper commit --model claude
# Output: feat: ✨ Agregar autenticación de usuario
Claude maintains high quality across all supported languages.

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Pricing

Anthropic charges based on input and output tokens. Typical usage:
  • Small commits: ~500-1,000 input tokens
  • Medium commits: ~1,500-3,000 input tokens
  • Large commits: ~5,000+ input tokens
  • Output: Usually 50-150 tokens per commit message
Check Anthropic’s pricing page for current rates.
Claude 4 Opus models are the most expensive but offer the highest quality. Use Sonnet for better cost efficiency.

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Tips for Best Results

  1. Stage related changes together - Claude understands relationships between files
  2. Use meaningful file names - Helps Claude understand the context
  3. Keep commits focused - Even powerful models benefit from focused changes
  4. Use prefixes - Add ticket numbers for better project tracking
gitwhisper commit --model claude --prefix "PROJ-456"

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Troubleshooting

Error: Invalid API key
Solution: Ensure you’re using a valid Anthropic API key:
gitwhisper save-key --model claude --key "sk-ant-..."

Error: Rate limit exceeded
Solution: Anthropic has rate limits per tier. Wait or upgrade your plan.
Error: Context length exceeded
Solution: Even with 200K context, extremely large diffs may hit limits. Stage changes in smaller groups.

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Comparison with Other Models

vs OpenAI

  • Claude: Better at nuanced understanding
  • OpenAI: Slightly faster response times
  • Both: Excellent for code analysis

vs Gemini

  • Claude: Superior reasoning
  • Gemini: Larger context (2M tokens)
  • Claude: More consistent quality

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Next Steps

OpenAI Models

Compare with OpenAI’s GPT models

All Variants

View complete list of Claude variants

Code Analysis

Deep dive into code analysis features

Configuration

Learn more about API key setup

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