Claude 4 Opus vs o3
API pricing, context window and capabilities for Claude 4 Opus and o3, side by side. Prices are the cheapest serving route per 1M tokens, verified against LiteLLM and OpenRouter.
Verdict
computed from the published numberso3 wins on price and on intelligence. Benchmark data is unavailable for one or both models.
Price
o3
Coding
Not called
Intelligence
o3
Context window
Tied
Key takeaways
who wins on what, from the published numbersClaude 4 Opus wins
- Higher max output (200K vs 100K)
o3 wins
- Cheaper input ($5.00 vs $2.00 /1M)
- Cheaper output ($25.00 vs $8.00 /1M)
- Has web search
Cheaper overall
o3
$2.00 + $8.00 /1M
Larger context
Tied
More providers
Tied
Pricing & specs
cheapest serving route · per 1M tokens| Claude 4 Opus | o3 | |
|---|---|---|
| Input $/1M | $5.00 | $2.00 best |
| Output $/1M | $25.00 | $8.00 best |
| Context window | 200K | 200K |
| Max output | 200K best | 100K |
| Serving providers | 3 | 3 |
| Released | n/a | 2025-04-16 |
Benchmarks
Artificial Analysis indices, side by side| Claude 4 Opus | o3 | |
|---|---|---|
| Intelligence | 25.5 | 30.4 best |
| GPQA Diamond | 70% | 83% best |
| Output speed | Not available | 146 t/s |
| Latency (TTFT) | Not available | 5.11s |
Cost calculator
choose a serving route for each sideInput tokens / month
Output tokens / month
Claude 4 Opus
via Snowflake
$50
o3
via Azure
$18
Capabilities
feature support, side by side| Feature | Claude 4 Opus | o3 |
|---|---|---|
| Vision | ✓ | ✓ |
| Tool use | ✓ | ✓ |
| Reasoning | ✓ | ✓ |
| Audio | — | — |
| Prompt caching | ✓ | ✓ |
| Structured output | ✓ | ✓ |
| Web search | — | ✓ |
Related comparisons
Frequently asked questions
Which is cheaper, Claude 4 Opus or o3?
o3 is cheaper for input ($5.00 vs $2.00 per 1M tokens). o3 is cheaper for output ($25.00 vs $8.00 per 1M tokens).
What is the context window difference between Claude 4 Opus and o3?
Both Claude 4 Opus and o3 have about a 200K-token context window.
How do Claude 4 Opus and o3 compare on benchmarks?
On the tracked Artificial Analysis indices, o3 leads on intelligence.
Pricing verified against LiteLLM + OpenRouter + provider pages · refreshed daily
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