Claude 4 Opus vs o3
API pricing, context window and capabilities for Claude 4 Opus and o3, side by side. Prices are the cheapest listed serving route per 1M tokens, from 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
Terminal-Bench
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)
- More serving providers (3 vs 4)
- Has web search
Cheaper overall
o3
$2.00 + $8.00 /1M
Larger context
Tied
More providers
o3
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 4 Opus | o3 | |
|---|---|---|
| Input $/1M | $5.00via Snowflake | $2.00via OpenAI best |
| Output $/1M | $25.00via Snowflake | $8.00via OpenAI best |
| Context window | 200K | 200K |
| Max output | 200K best | 100K |
| Serving providers | 3 | 4 best |
| Date | First listed Jul 2025 | Released Apr 16, 2025 |
Benchmarks
Benchmark scores, side by side| Claude 4 Opus | o3 | |
|---|---|---|
| Intelligence | 16.6 | 20.2 best |
| GPQA Diamond | 70% | 83% best |
| Output speed | Not available | 121 t/s |
| Latency (TTFT) | Not available | 6.79s |
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) from OpenAI. o3 is cheaper for output ($25.00 vs $8.00 per 1M tokens) from OpenAI.
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 benchmarks, o3 leads on intelligence.
Listed prices from LiteLLM, OpenRouter and Vercel · last checked Oct 14, 2026
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