Claude 4 Opus vs GPT 4.5 Preview
API pricing, context window and capabilities for Claude 4 Opus and GPT 4.5 Preview, side by side. Prices are the cheapest serving route per 1M tokens, verified against LiteLLM and OpenRouter.
Verdict
computed from the published numbersClaude 4 Opus wins on price, on intelligence and on context window. Benchmark data is unavailable for one or both models.
Price
Claude 4 Opus
Coding
Not called
Intelligence
Claude 4 Opus
Context window
Claude 4 Opus
Key takeaways
who wins on what, from the published numbersClaude 4 Opus wins
- Cheaper input ($5.00 vs $75.00 /1M)
- Cheaper output ($25.00 vs $150.00 /1M)
- Larger context window (200K vs 128K)
- Higher max output (200K vs 16K)
- More serving providers (3 vs 1)
- Has reasoning mode
GPT 4.5 Preview wins
No clear edge on the tracked metrics.
Cheaper overall
Claude 4 Opus
$5.00 + $25.00 /1M
Larger context
Claude 4 Opus
200K
More providers
Claude 4 Opus
3 providers
Pricing & specs
cheapest serving route · per 1M tokens| Claude 4 Opus | GPT 4.5 Preview | |
|---|---|---|
| Input $/1M | $5.00 best | $75.00 |
| Output $/1M | $25.00 best | $150.00 |
| Context window | 200K best | 128K |
| Max output | 200K best | 16K |
| Serving providers | 3 best | 1 |
| Released | n/a | n/a |
Benchmarks
Artificial Analysis indices, side by side| Claude 4 Opus | GPT 4.5 Preview | |
|---|---|---|
| Intelligence | 25.5 best | 13.6 |
| GPQA Diamond | 70% | Not available |
Cost calculator
choose a serving route for each sideInput tokens / month
Output tokens / month
Claude 4 Opus
via Snowflake
$50
GPT 4.5 Preview
via Azure
$525
Capabilities
feature support, side by side| Feature | Claude 4 Opus | GPT 4.5 Preview |
|---|---|---|
| Vision | ✓ | ✓ |
| Tool use | ✓ | ✓ |
| Reasoning | ✓ | — |
| Audio | — | — |
| Prompt caching | ✓ | ✓ |
| Structured output | ✓ | ✓ |
| Web search | — | — |
Related comparisons
Frequently asked questions
Which is cheaper, Claude 4 Opus or GPT 4.5 Preview?
Claude 4 Opus is cheaper for input ($5.00 vs $75.00 per 1M tokens). Claude 4 Opus is cheaper for output ($25.00 vs $150.00 per 1M tokens).
What is the context window difference between Claude 4 Opus and GPT 4.5 Preview?
Claude 4 Opus has a 200K-token context window and GPT 4.5 Preview has 128K tokens, so Claude 4 Opus can take a larger prompt.
How do Claude 4 Opus and GPT 4.5 Preview compare on benchmarks?
On the tracked Artificial Analysis indices, Claude 4 Opus leads on intelligence.
Pricing verified against LiteLLM + OpenRouter + provider pages · refreshed daily
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