Claude Sonnet 4.5 vs Claude Sonnet 4.6
Claude Sonnet 4.5 vs Claude Sonnet 4.6: Claude Sonnet 4.5 is cheaper for input-heavy usage ($3.00/M vs $3.00/M input tokens), while Claude Sonnet 4.6 is better for long-context tasks (1,000,000 tokens).
Direct answer: choose Claude Sonnet 4.5 for lower token spend and choose Claude Sonnet 4.6 when your workload needs longer context.
Compare input and output token pricing, context windows, and monthly cost estimates on one page so you can pick the cheaper model fast.
Cost Comparison (1000 input + 500 output tokens, 100 requests/day)
Claude Sonnet 4.5
Claude Sonnet 4.6
Cost Differences
Claude Sonnet 4.6 costs less than Claude Sonnet 4.5
Quick Recommendation
Winner for direct API pricing: Claude Sonnet 4.5. At the default workload, Claude Sonnet 4.5 saves about $0.00/month ($0.00/year) versus Claude Sonnet 4.6.
Feature Comparison
| Feature | Claude Sonnet 4.5 | Claude Sonnet 4.6 |
|---|---|---|
| Provider | Anthropic | Anthropic |
| Input Price | $3.00/1M tokens | $3.00/1M tokens |
| Output Price | $15.00/1M tokens | $15.00/1M tokens |
| Context Window | 200,000 tokens | 1,000,000 tokens |
| Max Output | 64,000 tokens | 65,536 tokens |
| Category | balanced | balanced |
| Capabilities | textvisioncode | textvisioncodereasoningcomputer-use |
| Release Date | 9/29/2025 | 2/18/2026 |
Claude Sonnet 4.5 vs Claude Sonnet 4.6: Which Should You Choose?
Choosing between Claude Sonnet 4.5 and Claude Sonnet 4.6 depends on your priorities: cost efficiency, context length, or raw capability. Claude Sonnet 4.6 is the more affordable option at $3.00/1M input tokens. Meanwhile, Claude Sonnet 4.6 offers a significantly larger context window at 1,000,000 tokens vs 200,000 for Claude Sonnet 4.5.
Both models are in the balanced category, making this a direct head-to-head comparison. At scale — say 10,000 requests per day — the cost difference adds up: Claude Sonnet 4.6 would save you roughly $0.00/month compared to Claude Sonnet 4.5. For startups and indie developers, that difference can be significant.
Output costs matter too. Claude Sonnet 4.5 charges $15.00/1M output tokens vs $15.00 for Claude Sonnet 4.6.
Multimodal capabilities: Both models support vision (image understanding), so you can send images alongside text prompts with either option.
Best Use Cases
Choose Claude Sonnet 4.5 when:
- • You're already using Anthropic's API ecosystem
Choose Claude Sonnet 4.6 when:
- • You need a larger context window (1,000,000 tokens)
- • You need more capabilities (reasoning, computer-use)
- • You need longer outputs (up to 65,536 tokens)
- • You're already using Anthropic's API ecosystem
Pros and Caveats at a Glance
Claude Sonnet 4.5
- • Input pricing: $3.00/M tokens
- • Output pricing: $15.00/M tokens
- • Context window: 200,000 tokens
- • Max output: 64,000 tokens
Watch out for
- • Smaller context window than Claude Sonnet 4.6
Claude Sonnet 4.6
- • Input pricing: $3.00/M tokens
- • Output pricing: $15.00/M tokens
- • Context window: 1,000,000 tokens
- • Max output: 65,536 tokens
Watch out for
- • Trade-offs are minor in this matchup.
Try Different Scenarios
Use the calculator below to see how costs change with different usage patterns
Claude Sonnet 4.5 (Anthropic)
Claude Sonnet 4.6 (Anthropic)
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Sign Up for Anthropic →Frequently Asked Questions
Which is cheaper, Claude Sonnet 4.5 or Claude Sonnet 4.6?▼
What is the context window difference between Claude Sonnet 4.5 and Claude Sonnet 4.6?▼
Which model is better for AI Chatbot?▼
Which model has better overall pricing for heavy usage?▼
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