Anthropic Claude delivers state-of-the-art language models with:
- Advanced reasoning and analysis
- Extended context windows up to 200K tokens
- Prompt caching for cost optimization
- Safety-focused design and outputs
Available Models
Claude 4.5 Series
Latest Claude models with enhanced capabilities and prompt caching.| Model | Input | Output | Cache Read | Cache Write | Best For |
|---|---|---|---|---|---|
| Claude Opus 4.5 (20251101) | $6.50/M | $32.50/M | $0.65/M | $8.12/M (5m) $13.00/M (1h) | Most advanced reasoning and analysis |
| Claude Sonnet 4.5 (20250929) | $3.90/M | $19.50/M | $0.39/M | $4.88/M (5m) $7.80/M (1h) | Balanced performance for production |
| Claude Haiku 4.5 (20251001) | $1.30/M | $6.50/M | $0.13/M | $1.62/M (5m) $2.60/M (1h) | Fast, cost-efficient, high-volume |
Claude 4 Series
Previous generation with strong capabilities and caching support.| Model | Input | Output | Cache Read | Cache Write | Best For |
|---|---|---|---|---|---|
| Claude Opus 4.1 (20250805) | $19.50/M | $97.50/M | $1.95/M | $24.38/M (5m) $39.00/M (1h) | Complex reasoning, deep analysis |
| Claude Opus 4 (20250514) | $19.50/M | $97.50/M | $1.95/M | $24.38/M (5m) $39.00/M (1h) | Research and creative tasks |
| Claude Sonnet 4 (20250514) | $3.90/M | $19.50/M | $0.39/M | $4.88/M (5m) $7.80/M (1h) | General purpose production |
Claude 3.7 Series
Enhanced 3-series with prompt caching support.| Model | Input | Output | Cache Read | Cache Write | Best For |
|---|---|---|---|---|---|
| Claude 3.7 Sonnet (20250219) | $3.90/M | $19.50/M | $0.39/M | $4.88/M (5m) $7.80/M (1h) | Enhanced Sonnet capabilities |
Claude 3.5 Series
Production-ready models with strong performance.| Model | Input | Output | Best For |
|---|---|---|---|
| Claude 3.5 Sonnet (20241022) | $3.90/M | $19.50/M | Latest 3.5 Sonnet |
| Claude 3.5 Sonnet (20240620) | $3.90/M | $19.50/M | Stable production |
| Claude 3.5 Haiku (20241022) | $1.04/M | $5.20/M | Fast, lightweight tasks |
Prompt caching significantly reduces costs for repeated content:
- Cache Read: 90% cheaper than standard input
- Cache Write (5m): Stores content for 5 minutes
- Cache Write (1h): Stores content for 1 hour
Best Practices
Model Selection
Use Opus for
- Complex research tasks
- Deep code analysis
- Creative writing
- Multi-step reasoning
- When quality matters most
Use Sonnet for
- Production applications
- Chatbots and assistants
- Content generation
- Code generation
- Balanced speed/quality
Use Haiku for
- High-volume tasks
- Fast responses
- Simple classification
- Data extraction
- Cost-sensitive workloads
Latest Models
- Claude 4.5: Best overall performance
- Claude 3.7: Enhanced 3-series
- Dated models: Stable versions
Prompt Caching
Optimize costs with prompt caching:
- Use 1-hour caching for frequently repeated context (e.g., system prompts, documentation)
- Use 5-minute caching for short-lived conversational context
- Cache large contexts (documentation, code repositories) to maximize savings
- Structure prompts with cacheable content first
- Repeated 50K token system prompt without cache: $195/1M requests
- With 1-hour cache: $32.50/1M requests = 83% savings
Context Windows
All Claude models support extended context:- Claude 4/4.5: Up to 200K tokens
- Claude 3.5/3.7: Up to 200K tokens