Claude 4 Sonnet vs Claude Opus 4.1
API pricing, context window and capabilities for Claude 4 Sonnet and Claude Opus 4.1, side by side. Prices are the cheapest serving route per 1M tokens, verified against LiteLLM and OpenRouter.
Verdict
computed from the published numbersClaude 4 Sonnet wins on price. Claude Opus 4.1 wins on intelligence. Benchmark data is unavailable for one or both models.
Price
Claude 4 Sonnet
Coding
Not called
Intelligence
Claude Opus 4.1
Context window
Tied
Key takeaways
who wins on what, from the published numbersClaude 4 Sonnet wins
- Cheaper input ($3.00 vs $15.00 /1M)
- Cheaper output ($15.00 vs $75.00 /1M)
- Higher max output (200K vs 32K)
Claude Opus 4.1 wins
- More serving providers (4 vs 6)
- Has reasoning mode
Cheaper overall
Claude 4 Sonnet
$3.00 + $15.00 /1M
Larger context
Tied
More providers
Claude Opus 4.1
6 providers
Pricing & specs
cheapest serving route · per 1M tokens| Claude 4 Sonnet | Claude Opus 4.1 | |
|---|---|---|
| Input $/1M | $3.00 best | $15.00 |
| Output $/1M | $15.00 best | $75.00 |
| Context window | 200K | 200K |
| Max output | 200K best | 32K |
| Serving providers | 4 | 6 best |
| Released | n/a | 2025-08-05 |
Benchmarks
Artificial Analysis indices, side by side| Claude 4 Sonnet | Claude Opus 4.1 | |
|---|---|---|
| Intelligence | 25.5 | 28.2 best |
| Coding | 37.6 | Not available |
| GPQA Diamond | 68% | 81% best |
| Output speed | Not available | 34 t/s |
| Latency (TTFT) | Not available | 6.00s |
Cost calculator
choose a serving route for each sideInput tokens / month
Output tokens / month
Claude 4 Sonnet
via Replicate
$30
Claude Opus 4.1
via Anthropic
$150
Capabilities
feature support, side by side| Feature | Claude 4 Sonnet | Claude Opus 4.1 |
|---|---|---|
| Vision | ✓ | ✓ |
| Tool use | ✓ | ✓ |
| Reasoning | — | ✓ |
| Audio | — | — |
| Prompt caching | ✓ | ✓ |
| Structured output | ✓ | ✓ |
| Web search | — | — |
Related comparisons
Frequently asked questions
Which is cheaper, Claude 4 Sonnet or Claude Opus 4.1?
Claude 4 Sonnet is cheaper for input ($3.00 vs $15.00 per 1M tokens). Claude 4 Sonnet is cheaper for output ($15.00 vs $75.00 per 1M tokens).
What is the context window difference between Claude 4 Sonnet and Claude Opus 4.1?
Both Claude 4 Sonnet and Claude Opus 4.1 have about a 200K-token context window.
How do Claude 4 Sonnet and Claude Opus 4.1 compare on benchmarks?
On the tracked Artificial Analysis indices, Claude Opus 4.1 leads on intelligence.
Pricing verified against LiteLLM + OpenRouter + provider pages · refreshed daily
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