Claude 3 Opus vs Claude 4 Sonnet
API pricing, context window and capabilities for Claude 3 Opus and Claude 4 Sonnet, side by side. Prices are the cheapest listed serving route per 1M tokens, from LiteLLM and OpenRouter.
Verdict
computed from the published numbersClaude 4 Sonnet wins on price and on intelligence. Benchmark data is unavailable for one or both models.
Price
Claude 4 Sonnet
Terminal-Bench
Not called
Intelligence
Claude 4 Sonnet
Context window
Tied
Key takeaways
who wins on what, from the published numbersClaude 3 Opus wins
No clear edge on the tracked metrics.
Claude 4 Sonnet wins
- Cheaper input ($15.00 vs $3.00 /1M)
- Cheaper output ($75.00 vs $15.00 /1M)
- Higher max output (4K vs 200K)
- More serving providers (2 vs 4)
- Supports prompt caching
Cheaper overall
Claude 4 Sonnet
$3.00 + $15.00 /1M
Larger context
Tied
More providers
Claude 4 Sonnet
4 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.
| Claude 3 Opus | Claude 4 Sonnet | |
|---|---|---|
| Input $/1M | $15.00via Vertex AI Anthropic Models | $3.00via Replicate best |
| Output $/1M | $75.00via Vertex AI Anthropic Models | $15.00via Replicate best |
| Context window | 200K | 200K |
| Max output | 4K | 200K best |
| Serving providers | 2 | 4 best |
| Date | Released Mar 4, 2024 | First listed Jul 2025 |
Benchmarks
Benchmark scores, side by side| Claude 3 Opus | Claude 4 Sonnet | |
|---|---|---|
| Intelligence | 8.7 | 16.6 best |
| Terminal-Bench | Not available | 36% |
| GPQA Diamond | 49% | 68% best |
Cost calculator
choose a serving route for each sideInput tokens / month
Output tokens / month
Claude 3 Opus
via Vertex AI Anthropic Models
$150
Claude 4 Sonnet
via Replicate
$30
Capabilities
feature support, side by side| Feature | Claude 3 Opus | Claude 4 Sonnet |
|---|---|---|
| Vision | ✓ | ✓ |
| Tool use | ✓ | ✓ |
| Reasoning | — | — |
| Audio | — | — |
| Prompt caching | — | ✓ |
| Structured output | ✓ | ✓ |
| Web search | — | — |
Related comparisons
Frequently asked questions
Which is cheaper, Claude 3 Opus or Claude 4 Sonnet?
Claude 4 Sonnet is cheaper for input ($15.00 vs $3.00 per 1M tokens) from Replicate. Claude 4 Sonnet is cheaper for output ($75.00 vs $15.00 per 1M tokens) from Replicate.
What is the context window difference between Claude 3 Opus and Claude 4 Sonnet?
Both Claude 3 Opus and Claude 4 Sonnet have about a 200K-token context window.
How do Claude 3 Opus and Claude 4 Sonnet compare on benchmarks?
On the tracked benchmarks, Claude 4 Sonnet leads on intelligence.
Listed prices from LiteLLM, OpenRouter and Vercel · last checked Oct 14, 2026
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