Claude Opus Latest vs Claude Sonnet 4 (2025-05-14)
API pricing, context window and capabilities for Claude Opus Latest and Claude Sonnet 4 (2025-05-14), side by side. Prices are the cheapest listed serving route per 1M tokens, from LiteLLM and OpenRouter.
Verdict
computed from the published numbersClaude Sonnet 4 (2025-05-14) wins on price. Benchmark data is unavailable for one or both models.
Price
Claude Sonnet 4 (2025-05-14)
Terminal-Bench
Not called
Intelligence
Not called
Context window
Tied
Key takeaways
who wins on what, from the published numbersClaude Opus Latest wins
- Higher max output (128K vs 64K)
- Has web search
Claude Sonnet 4 (2025-05-14) wins
- Cheaper input ($4.00 vs $3.00 /1M)
- Cheaper output ($20.00 vs $15.00 /1M)
- More serving providers (1 vs 3)
Cheaper overall
Claude Sonnet 4 (2025-05-14)
$3.00 + $15.00 /1M
Larger context
Tied
More providers
Claude Sonnet 4 (2025-05-14)
3 providers
Pricing & specs
cheapest listed route · per 1M tokensOn-demand listed rates, OpenRouter routed quotes and Vercel reseller quotes. Enterprise commitments can be materially lower. An OpenRouter routed quote is the price of whichever upstream provider OpenRouter prefers today, so it moves day to day.
| Claude Opus Latest | Claude Sonnet 4 (2025-05-14) | |
|---|---|---|
| Input $/1M | $4.00OpenRouter routed quote | $3.00via Anthropic best |
| Output $/1M | $20.00OpenRouter routed quote | $15.00via Anthropic best |
| Context window | 1M | 1M |
| Max output | 128K best | 64K |
| Serving providers | 1 | 3 best |
| Date | Released Jul 6, 2026 | Released May 22, 2025 |
Cost calculator
choose a serving route for each sideInput tokens / month
Output tokens / month
Claude Opus Latest
via OpenRouter
$40
Claude Sonnet 4 (2025-05-14)
via Anthropic
$30
Capabilities
feature support, side by side| Feature | Claude Opus Latest | Claude Sonnet 4 (2025-05-14) |
|---|---|---|
| Vision | ✓ | ✓ |
| Tool use | ✓ | ✓ |
| Reasoning | ✓ | ✓ |
| Audio | — | — |
| Prompt caching | ✓ | ✓ |
| Structured output | ✓ | ✓ |
| Web search | ✓ | — |
Related comparisons
Frequently asked questions
Which is cheaper, Claude Opus Latest or Claude Sonnet 4 (2025-05-14)?
Claude Sonnet 4 (2025-05-14) is cheaper for input ($4.00 vs $3.00 per 1M tokens) from Anthropic. Claude Sonnet 4 (2025-05-14) is cheaper for output ($20.00 vs $15.00 per 1M tokens) from Anthropic.
What is the context window difference between Claude Opus Latest and Claude Sonnet 4 (2025-05-14)?
Both Claude Opus Latest and Claude Sonnet 4 (2025-05-14) have about a 1M-token context window.
Listed prices from LiteLLM, OpenRouter and Vercel · last checked Sep 22, 2026
Every weekday
AI moves fast. Here's your debrief.
News, analysis, tools, and more.
For people who build with AI