Anthropic: Claude Opus 4.5 vs Anthropic: Claude Sonnet 4
Side-by-side comparison of Anthropic: Claude Opus 4.5 and Anthropic: Claude Sonnet 4. Compare pricing, context window, capabilities, and find out which is better for your workflow.
Verdict
marginal confidenceAnthropic: Claude Sonnet 4 leads overall
Anthropic: Claude Sonnet 4 leads in price, making it the stronger choice for most workflows. Anthropic: Claude Opus 4.5 remains a solid alternative depending on your specific needs.
Best for with Anthropic: Claude Opus 4.5
Best for with Anthropic: Claude Sonnet 4
Side-by-side
Technical specifications
| Anthropic: Claude Opus 4.5 | Anthropic: Claude Sonnet 4 | |
|---|---|---|
| Provider | Anthropic | Anthropic |
| Input price | $5/M | $3/M |
| Output price | $25/M | $15/M |
| Context window | 200K | 200K |
| Max output | 64K | 64K |
| Capabilities | Tool useVisionReasoning | Tool useVisionReasoning |
| Released | Nov 24, 2025 | May 22, 2025 |
Scoring breakdown
How each dimension compares
Price
Anthropic: Claude Sonnet 4 leadsAnthropic: Claude Opus 4.5
$25/M tokens
Anthropic: Claude Sonnet 4
$15/M tokens
Context Window
Anthropic: Claude Opus 4.5
200K tokens
Anthropic: Claude Sonnet 4
200K tokens
Capabilities
Anthropic: Claude Opus 4.5
3/4
Anthropic: Claude Sonnet 4
3/4
Max Output
Anthropic: Claude Opus 4.5
64K tokens
Anthropic: Claude Sonnet 4
64K tokens
Recency
Anthropic: Claude Opus 4.5
Nov 2025
Anthropic: Claude Sonnet 4
May 2025
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