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 listed serving route per 1M tokens, from 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
Terminal-Bench
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 listed route · per 1M tokensOn-demand listed rates, OpenRouter routed quotes and Vercel reseller quotes. Enterprise commitments can be materially lower.
| Claude 4 Opus | GPT 4.5 Preview | |
|---|---|---|
| Input $/1M | $5.00via Snowflake best | $75.00via Azure |
| Output $/1M | $25.00via Snowflake best | $150.00via Azure |
| Context window | 200K best | 128K |
| Max output | 200K best | 16K |
| Serving providers | 3 best | 1 |
| Date | First listed Jul 2025 | First listed Feb 2025 |
Benchmarks
Benchmark scores, side by side| Claude 4 Opus | GPT 4.5 Preview | |
|---|---|---|
| Intelligence | 16.6 best | 9.6 |
| 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) from Snowflake. Claude 4 Opus is cheaper for output ($25.00 vs $150.00 per 1M tokens) from Snowflake.
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 benchmarks, Claude 4 Opus leads on intelligence.
Listed prices from LiteLLM, OpenRouter and Vercel · last checked Oct 14, 2026
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